Practice calculating magnification, image size and real size with these tiered questions. Answers included. If you could spare 5 minutes, please review this resource, to help my online presence grow! :)

Students will research and fill in 2 worksheets on organisms that went extinct in Qatar.

Students will create a lab report on the osmosis potato practical.

Students can practise calculating surface area to volume ratios. Answers are provided.

26 mark quiz on cells and microscopes. Includes questions about: Calculating total magnification. Taking a measurement to calculate the actual size of a specimen. Animal cells, plant cells, prokaryotic cells. Light and electron microscopes. Mark scheme included.

This PowerPoint resource provides an engaging and comprehensive lesson on the factors influencing variation within species, focusing on genetic inheritance and environmental effects. Designed for high school biology classes, this lesson incorporates real-world examples and data analysis to deepen understanding. Key learning objectives: Defining variation and categorizing human traits as inherited, environmental, or a combination of both. Exploring examples of variation within a species, such as hair color, height, and weight. Interpreting data from twin studies to differentiate the influences of genetics and the environment. Understanding the challenges scientists face when studying identical twins and long-term human development. Resource features: The lesson begins with a starter activity prompting students to list differences between individuals, such as eye color and body weight, to activate prior knowledge about variation. Key concepts include: Inherited Characteristics: Traits passed from parents to offspring through genes, such as blood type and natural hair color. Environmental Characteristics: Traits influenced by external factors, such as scars and spoken language. Combination of Factors: Characteristics affected by both genetics and the environment, such as height or intelligence. Students engage with practical activities, such as sorting traits into categories and analyzing case studies involving identical twins raised together versus apart. The lesson highlights real-world challenges in conducting twin studies, including ethical concerns, rare case availability, and the extended timescales required for observation. Interactive tasks include data interpretation, answering reflective questions, and completing gap-fill exercises about twin studies. Students also explore the implications of these studies for understanding human development. File details: This editable ‘.pptx’ file aligns with biology curricula and supports classroom discussions and independent analysis. It features clear visuals, real-world examples, and guided activities, making it an essential resource for teaching variation and its causes.

This PowerPoint resource provides a comprehensive lesson on genetic inheritance, focusing on inherited disorders and how to use Punnett squares to predict the likelihood of offspring inheriting specific traits. Designed for middle and high school biology classes, this lesson blends theoretical knowledge with practical skills in genetics. Key learning objectives: Understanding what inherited disorders are and identifying examples, such as cystic fibrosis and polydactyly. Using Punnett squares to model genetic crosses and predict probabilities of inherited traits. Explaining the role of dominant and recessive alleles in the inheritance of genetic disorders. Applying probability and genetic theory to analyze real-world examples of inheritance. Resource features: The lesson begins with a starter activity to activate prior knowledge, including questions on genotypes, phenotypes, and the definitions of alleles, dominant, and recessive traits. Students are introduced to inherited disorders such as: Cystic Fibrosis: A recessive disorder requiring two copies of the recessive allele for expression. Polydactyly: A dominant disorder requiring only one copy of the dominant allele for expression. Key activities include: Drawing Punnett squares to predict offspring genotypes and phenotypes for various genetic crosses. Exploring the probabilities of inheriting disorders when both parents are carriers or have specific genotypes. Practicing with non-disorder-related traits, such as fur color in mice and earlobe attachment in humans, to reinforce the use of Punnett squares. The lesson also encourages critical thinking with real-world applications, such as evaluating ethical considerations in genetic counseling and understanding the implications of carrier screening. File details: This editable ‘.pptx’ file aligns with biology curricula and supports both classroom instruction and independent learning. It features clear visuals, guided examples, and interactive activities, making it an essential resource for teaching inherited disorders and genetic inheritance.

This PowerPoint resource provides an engaging and detailed lesson on genetic inheritance, the role of chromosomes in determining gender, and using genetic cross diagrams to predict offspring characteristics. It is tailored for high school biology classes focused on genetics and heredity. Key learning objectives: Understanding that females have XX chromosomes and males have XY chromosomes, and how these determine gender. Using Punnett squares to demonstrate the inheritance of sex chromosomes and predict the probability of being born male or female. Defining and applying key genetics terms, including allele, dominant, recessive, genotype, phenotype, heterozygous, and homozygous. Resource features: The lesson begins with a starter activity prompting students to recall foundational concepts, such as where DNA is found, the purpose of meiosis, and the advantages of sexual reproduction. Key learning points include: Gender Determination: A detailed explanation of how the sex chromosomes are passed from parents to offspring and their role in determining gender. Genetic Cross Diagrams: Step-by-step guidance on completing Punnett squares to model inheritance patterns, with real-world examples like hair length in dogs and human eye color. Alleles and Traits: Introducing dominant and recessive alleles with clear examples, showing how combinations influence genotype and phenotype. Interactive tasks include: Completing and interpreting genetic cross diagrams to predict offspring outcomes. Analyzing case studies to determine genotypes and phenotypes for specific traits. Exploring the ratio and probability of male versus female offspring and discussing how this impacts population dynamics. File details: This editable ‘.pptx’ file aligns with biology curricula and supports both classroom instruction and independent study. It includes clear visuals, practical examples, and guided activities, making it an essential resource for teaching inheritance, genetic crosses, and gender determination.

This PowerPoint resource provides an engaging lesson designed to teach students about reflex actions, their importance in the human body, and the stages of a reflex arc. It is tailored for high school biology classes focusing on the nervous system and homeostasis. Key learning objectives: Describing the stages involved in a reflex action, from stimulus detection to the final response. Identifying the roles of stimuli, receptors, coordination centers, and effectors in reflex actions. Understanding how reflexes enable rapid, involuntary responses to protect the body from harm. Resource features: The lesson begins with a starter activity reviewing homeostasis and examples of reflexes, prompting students to think about the internal conditions maintained by the body and why they need to stay constant. Key topics include: Stimuli and Receptors: Students learn about stimuli as changes in the environment and receptors as specialized cells that detect stimuli (e.g., light, sound, or temperature) and generate electrical impulses. Coordination Centers and Effectors: The roles of the brain, spinal cord, and other organs as coordination centers are explained, along with how effectors (muscles and glands) respond to signals. Reflex Arc: The sequence of events in a reflex arc is broken down into clear steps, using examples like touching a hot object. Students identify and arrange the stages of a reflex arc in the correct order, reinforcing their understanding. Interactive tasks include gap-fill exercises, labeling diagrams of reflex arcs, and answering reflective questions about the role of reflex actions in daily life. File details: This editable ‘.pptx’ file aligns with biology curricula and supports theoretical and practical learning. It includes clear visuals, practical examples, and interactive activities, making it an essential resource for teaching reflex actions and their role in the nervous system.

This PowerPoint resource introduces students to the foundational concepts of homeostasis, its importance, and how it is maintained in the human body. Designed for high school biology classes, this lesson emphasizes the role of the nervous system, hormones, and reflexes in maintaining internal conditions. Key learning objectives: Defining homeostasis as the maintenance of a constant internal environment in the body. Identifying internal conditions that need regulation, such as temperature, water content, and blood sugar levels, and understanding why these are vital for survival. Explaining how homeostasis is controlled through the nervous system and hormones, including reflex actions as rapid, involuntary responses. Resource features: The lesson begins with a thought-provoking starter activity prompting students to consider how the body responds to external and internal changes. Core concepts are introduced with clear visuals and real-world examples, such as: Why Homeostasis is Important: Exploring how deviations in temperature or blood sugar affect enzyme function and cellular processes. Control Mechanisms: Understanding how coordination and control systems like the central nervous system (CNS) and hormones maintain internal balance. Reflex Actions: Highlighting their role in protecting the body from harm, using relatable scenarios like touching a hot surface or shivering in cold temperatures. Interactive activities include identifying voluntary and involuntary actions, completing gap-fill exercises to reinforce definitions, and answering review questions on homeostasis and its control mechanisms. Students also explore real-life applications, such as the significance of insulin in regulating blood sugar. File details: This editable ‘.pptx’ file aligns with biology curricula and supports both theoretical learning and classroom discussion. It includes structured explanations, practical examples, and interactive activities, making it an essential resource for understanding homeostasis and its principles.

This PowerPoint resource provides an engaging lesson designed to teach students the principles of osmosis, its definition, and its role in biological systems. It is ideal for middle and high school biology classes focusing on cellular processes and water movement. Key learning objectives: Defining osmosis as the diffusion of water from a dilute solution to a concentrated solution through a partially-permeable membrane. Predicting whether water will enter or leave cells by osmosis based on the concentration of solutions. Understanding the effects of osmosis on animal and plant cells, including bursting, shrinking, turgidity, and plasmolysis. Resource features: The lesson begins with a starter activity revisiting diffusion, the substances involved in respiration, and adaptations of the small intestine and lungs for diffusion. These concepts provide a strong foundation for understanding osmosis. Key topics include: Osmosis Definition: Students explore how water moves across cell membranes, with diagrams illustrating dilute and concentrated solutions. Effects on Animal Cells: Examples show how cells can swell and burst or shrink depending on the surrounding solution’s concentration. Effects on Plant Cells: Discussions on turgid and flaccid cells explain how water movement affects plant rigidity, leading to wilting or plasmolysis. Practical Investigation: Students predict and observe water movement using visking tubing filled with sugar solutions, modeling osmotic effects. Interactive tasks involve diagram completion, labeling plant and animal cell structures, and predicting osmosis outcomes in given scenarios. Students also analyze the importance of osmosis in processes like desalination and plant water support. File details: This editable ‘.pptx’ file aligns with biology curricula and supports both classroom instruction and independent learning. It includes clear visuals, practical activities, and guided questions, making it an essential resource for teaching osmosis and its applications.

This PowerPoint resource provides a comprehensive lesson on the internal structure of a leaf, the specialized functions of plant tissues, and how these adaptations facilitate photosynthesis. It is designed for middle and high school biology classes, offering both theoretical insights and practical applications. Key learning objectives: Identifying and labeling the cellular structures of a leaf, including stomata, mesophyll, and vascular bundles. Explaining how different plant tissues, such as epidermal tissue, palisade mesophyll, and spongy mesophyll, are adapted for photosynthesis and gas exchange. Understanding the role of xylem and phloem in the transport of water, minerals, and glucose within the plant. Resource features: The lesson begins with a starter activity prompting students to recall basic leaf adaptations and processes like diffusion. Key topics include: Leaf Structure and Function: Detailed explanations of tissues such as the waxy cuticle (waterproofing), guard cells (stomatal regulation), and mesophyll layers (photosynthesis and gas diffusion). Vascular Bundles: The role of xylem and phloem in transporting water, minerals, and glucose. Gas Exchange: How stomata and air spaces facilitate carbon dioxide entry and oxygen exit for photosynthesis. Interactive activities include: Labeling diagrams of leaf cross-sections with missing terms. Answering reflective questions on the functions of specific tissues, such as palisade mesophyll and guard cells. Completing tables to match plant tissues with their adaptations and roles. The lesson culminates in practice questions, where students describe the collaborative functions of leaf tissues in photosynthesis, emphasizing their structural and functional relationships. File details: This editable ‘.pptx’ file aligns with biology curricula and supports classroom instruction and independent study. It includes clear visuals, structured explanations, and practical activities, making it an essential resource for teaching leaf anatomy and plant tissue adaptations.

This PowerPoint resource provides a detailed lesson on the process of photosynthesis, its importance for life on Earth, and how plants adapt to optimize this process. Designed for middle and high school biology classes, it incorporates theoretical knowledge, practical examples, and review activities. Key learning objectives: Defining photosynthesis as the process by which plants and algae make their own food, using light energy to convert carbon dioxide and water into glucose and oxygen. Writing the word and symbol equations for photosynthesis. Explaining how the reactants (carbon dioxide, water) are transported to the leaf and how the products (oxygen, glucose) are distributed or removed. Resource features: The lesson begins with a starter activity exploring basic plant biology, such as whether plants are living organisms and the gases involved in photosynthesis. Key concepts are introduced with clear explanations and diagrams. What is Photosynthesis? A chemical process in chloroplasts where sunlight is captured to produce glucose and oxygen, with energy stored in glucose. Reactants and Products: Carbon dioxide enters through the stomata by diffusion. Water is absorbed by root hair cells and transported via xylem. Oxygen and water vapor exit through stomata. Glucose is transported by phloem and stored as starch. Interactive tasks include annotating diagrams to show reactant entry and product exit, filling in practice questions, and labeling chemical formulas. The resource also covers the importance of photosynthesis in maintaining atmospheric oxygen and carbon dioxide levels. File details: This editable ‘.pptx’ file aligns with biology curricula and supports classroom instruction or independent study. It features clear visuals, practical exercises, and guided explanations, making it an essential tool for teaching the foundations of photosynthesis.

This PowerPoint resource provides a detailed lesson on the roles of stomata and guard cells, their structure and function, and how they contribute to a leaf’s adaptations for photosynthesis. It is designed for middle and high school biology classes focused on plant biology and photosynthesis. Key learning objectives: Identifying and labeling stomata and guard cells in a diagram. Describing the roles of stomata and guard cells, including how they open and close to regulate gas exchange. Observing stomata and guard cells under a microscope using a hands-on method. Understanding the general adaptations of a leaf for efficient photosynthesis. Resource features: The lesson begins with a starter activity prompting students to recall key concepts related to photosynthesis, including its reactants, products, and overall importance. Core topics are presented with clear explanations and visuals, including: Stomata and Guard Cells: Definitions of stomata as pores on the surface of leaves and guard cells as the structures controlling their opening and closing. Students explore the mechanism of water intake and loss in guard cells, leading to stomatal movement. Gas Exchange: Understanding how carbon dioxide, oxygen, and water vapor move through stomata to facilitate photosynthesis and transpiration. Microscope Activity: A step-by-step guide for observing stomata on a leaf using clear nail varnish and cellotape to prepare slides for analysis under a microscope. The lesson also highlights key leaf adaptations for photosynthesis, such as a large surface area, chlorophyll for light absorption, thin structure for short diffusion distances, and veins for water and glucose transport. Interactive activities include labeling diagrams, matching adaptations to functions, and answering review questions on stomatal function and leaf structure. File details: This editable ‘.pptx’ file aligns with biology curricula and supports both theoretical and practical learning. It includes structured guidance, practical investigations, and interactive tasks, making it an essential resource for teaching stomata and their role in photosynthesis.

This PowerPoint resource provides a comprehensive and interactive lesson exploring the relationship between lifestyle choices, health, and disease. Designed for middle and high school biology or health education classes, it emphasizes the importance of a balanced diet, regular exercise, and maintaining a healthy body weight. Key learning objectives: Defining obesity and understanding its measurement using Body Mass Index (BMI). Analyzing the relationship between obesity and health problems, including type 2 diabetes, cardiovascular disease, and high blood pressure. Exploring the benefits of regular exercise and balanced nutrition in preventing and managing obesity-related diseases. Evaluating data to establish causal links between lifestyle choices and health outcomes. Resource features: The lesson begins with a starter activity encouraging students to address common misconceptions about obesity, exercise, and diet through true/false questions. Key topics include: What is Obesity? Defining obesity as a condition of excess body fat, with BMI used as a measurement tool. Worked examples guide students in calculating BMI and interpreting its implications. Health Risks of Obesity: Exploring how obesity contributes to type 2 diabetes, coronary heart disease, and other health issues. Visual aids and data graphs help students understand trends in obesity and related diseases. Benefits of Exercise: Highlighting how regular physical activity improves heart health, increases metabolic rates, and reduces the risk of chronic diseases. Preventative Measures: Practical strategies for reducing obesity rates, including balanced diets, increased physical activity, and public health initiatives. Interactive tasks include: Calculating BMI from provided data and determining health implications. Interpreting graphs showing the relationship between BMI and type 2 diabetes. Reflective questions prompting students to link lifestyle choices with health outcomes and propose preventative solutions. File details: This editable ‘.pptx’ file aligns with health education and biology curricula and supports both classroom instruction and independent study. It includes real-world data, structured explanations, and practical activities, making it an essential resource for teaching the links between obesity, diet, and exercise.

This PowerPoint resource provides a comprehensive introduction to microorganisms that cause diseases, their modes of transmission, and strategies for preventing infection. It is designed for middle and high school biology or health education classes focused on microbiology and public health. Key learning objectives: Defining pathogens and identifying the four types that cause diseases: bacteria, viruses, protists, and fungi. Explaining how bacteria and viruses cause illness through toxins and cell damage, respectively. Describing modes of pathogen transmission: air, direct contact, and contaminated food or water. Proposing methods to prevent the spread of pathogens, such as hygiene, vaccination, and vector control. Resource features: The lesson begins with a starter activity challenging students to evaluate common statements about microorganisms, stimulating critical thinking about microbes and pathogens. Key topics are introduced with clear definitions and examples: What are Pathogens? Microorganisms that cause diseases, including bacteria (e.g., cholera), viruses (e.g., influenza), fungi (e.g., athlete’s foot), and protists (e.g., malaria). How Pathogens Spread: Detailed explanations of transmission methods, such as airborne droplets, direct contact with contaminated surfaces, and ingesting contaminated food or water. Preventing Infection: Strategies like hygiene (e.g., handwashing, disinfectants), isolating infected individuals, vaccination, and vector control (e.g., mosquito eradication). Interactive tasks include: Completing tables to compare pathogen types and their effects. Watching a video to answer questions on pathogen behavior and transmission. Filling in a mind-map detailing ways to prevent the spread of pathogens. Answering review questions that consolidate knowledge of transmission and prevention methods. File details: This editable ‘.pptx’ file aligns with science curricula and supports both theoretical learning and public health awareness. It includes real-world examples, structured explanations, and interactive activities, making it an essential resource for teaching the biology of pathogens and disease prevention.

This PowerPoint resource provides a comprehensive lesson on the short-term and long-term effects of alcohol consumption, its impact on the body and brain, and the dangers of drinking alcohol during pregnancy. Designed for middle and high school science or health education classes, it focuses on understanding the risks and promoting informed decision-making. Key learning objectives: Describing the short-term effects of alcohol, such as impaired judgment, reaction time, and muscle control. Understanding the long-term consequences of excessive alcohol consumption, including liver cirrhosis, liver cancer, and brain damage. Exploring the impact of alcohol on unborn babies and the risks of fetal alcohol syndrome (FAS). Resource features: The lesson begins with a starter activity featuring true/false statements to assess students’ preconceptions about alcohol, such as its addictive properties and its effects on the nervous system. Key topics are introduced with clear explanations and engaging visuals: What is Alcohol? Students learn that alcohol contains ethanol, a depressant that slows down the nervous system and affects brain function. Short-Term Effects: Includes sleepiness, impaired judgment, blurred vision, and decreased reaction times. Long-Term Effects: Discusses conditions like liver cirrhosis, liver cancer, and irreversible brain damage in chronic drinkers. Alcohol and Pregnancy: Explains how alcohol passes through the placenta to the fetus, increasing the risk of miscarriage, stillbirth, and FAS, which can lead to developmental delays and physical deformities. Interactive tasks include filling in missing words, completing a mind map on alcohol’s effects, and designing a poster to raise awareness about the dangers of drinking alcohol during pregnancy. Students also answer reflection questions to reinforce learning. File details: This editable ‘.pptx’ file aligns with health education and science curricula. It features structured explanations, real-world examples, and interactive activities, making it an essential resource for teaching about alcohol and its impacts on health.

This PowerPoint resource provides an engaging and detailed introduction to the concepts of health, disease, and the factors affecting well-being. It is designed for middle and high school biology classes and integrates theoretical knowledge with interactive activities to explore communicable and non-communicable diseases. Key learning objectives: Defining health as a state of physical and mental well-being. Distinguishing between communicable (infectious) diseases caused by pathogens and non-communicable diseases influenced by lifestyle, genetics, and environment. Exploring how diseases interact, such as immune system defects increasing vulnerability to infections or viruses triggering cancer. Identifying factors influencing health, including diet, stress, access to healthcare, and living conditions. Resource features: The lesson begins with a starter activity prompting students to list diseases and categorize them as communicable or non-communicable. Key concepts are introduced with clear definitions and relatable examples: Communicable Diseases: Examples include measles, malaria, and HIV, caused by harmful microbes that can spread between individuals. Non-Communicable Diseases: Examples include asthma, diabetes, and heart disease, often influenced by lifestyle and genetics. Disease Interactions: Students analyze scenarios where diseases exacerbate each other, such as immune system defects leading to more severe infections or viruses triggering cancer development. Interactive tasks include: Completing a mind map on the causes of ill health. Sorting diseases into communicable and non-communicable categories. Matching activities linking diseases to their causes and effects. Reflective questions exploring the relationships between health factors, diseases, and their broader impacts. The lesson emphasizes the holistic view of health, integrating physical, mental, and social well-being, and encourages critical thinking about public health strategies. File details: This editable ‘.pptx’ file aligns with biology curricula and supports both classroom instruction and independent study. It includes structured explanations, real-world examples, and interactive tasks, making it an essential resource for teaching health and disease.

This PowerPoint resource provides an engaging and comprehensive lesson introducing the structure, function, and importance of the human digestive system. It is designed for middle school biology or science classes, combining clear explanations with interactive activities to make learning accessible and enjoyable. Key learning objectives: Defining digestion as the breakdown of large, insoluble food molecules into smaller, soluble molecules for absorption into the bloodstream. Identifying and labeling the main parts of the digestive system, including the mouth, oesophagus, stomach, small intestine, large intestine, liver, gallbladder, and pancreas. Explaining the role of mechanical and chemical digestion in breaking down food, emphasizing enzymes and their functions. Resource features: The lesson begins with a starter activity designed to activate prior knowledge, asking students to recall nutrients and food tests (e.g., iodine for starch, Benedict’s solution for sugars). Key topics are introduced with visuals and detailed explanations: Mouth: Demonstrates mechanical digestion (chewing) and the action of salivary enzymes. Oesophagus: Explains peristalsis as the wave-like muscle contractions that move food. Stomach: Covers muscular churning, enzyme action, and the role of hydrochloric acid in killing bacteria. Small Intestine: Focuses on enzyme production and nutrient absorption through villi. Large Intestine: Highlights water absorption and the formation of faeces. Liver and Gallbladder: Explains bile production, its role in fat emulsification, and storage. Pancreas: Discusses its role in secreting digestive enzymes into the small intestine. Interactive activities include: Labeling diagrams of the digestive system. Answering reflective questions about the functions of each organ. Completing flow diagrams that trace the path of food through the digestive system. The plenary consolidates learning with review questions about the digestive system’s structure and function. File details: This editable ‘.pptx’ file aligns with middle school biology curricula. It includes structured content, clear visuals, and practical activities, making it an essential resource for teaching the digestive system and its role in human health.

This PowerPoint resource provides a comprehensive lesson on the harmful effects of smoking, the substances in tobacco smoke, and the impact of smoking on health, including its effects on unborn babies. It is designed for middle and high school science or health education classes focusing on lifestyle choices and their implications. Key learning objectives: Identifying the harmful substances in cigarette smoke, such as tar, nicotine, and carbon monoxide, and their effects on the body. Understanding how smoking damages the lungs, circulatory system, and other organs, leading to diseases like cancer, chronic obstructive pulmonary disease (COPD), and heart disease. Explaining the specific risks of smoking during pregnancy, including its effects on fetal development and the risks of miscarriage, premature birth, and stillbirth. Resource features: The lesson begins with a starter activity to dispel misconceptions about smoking through true/false questions, such as whether smoking causes lung cancer or if nicotine is addictive. Key topics are introduced with clear explanations and data: Harmful Substances in Tobacco Smoke: Tar: Contains carcinogens that cause lung cancer and mutations in respiratory cells. Nicotine: Highly addictive, increases heart rate, and raises blood pressure. Carbon Monoxide: Reduces the oxygen-carrying capacity of blood, leading to shortness of breath and fatigue. Diseases Linked to Smoking: Discusses how smoking contributes to lung cancer, heart disease, and strokes, supported by data and visuals. Smoking and Pregnancy: Explains how carbon monoxide deprives the fetus of oxygen, leading to complications like low birth weight, developmental issues, and stillbirths. Interactive tasks include: Analyzing the role of smoking in causing diseases like COPD and cancer. Filling in missing words about the effects of smoking. Completing diagrams of the respiratory system to show how smoking damages alveoli and reduces lung capacity. The lesson concludes with reflective questions and activities to consolidate learning, such as designing awareness posters about the risks of smoking. File details: This editable ‘.pptx’ file aligns with health education and science curricula. It includes clear visuals, real-world examples, and interactive activities, making it an essential resource for teaching the dangers of smoking and promoting healthy lifestyle choices.