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Photosynthesis and Plant Nutrition -Edexcel IGCSE Biology
Topics
Understanding the process of photosynthesis and understand its importance in conversion of light energy to chemical energy
Knowing the word equation and the balanced chemical symbol equation for photosynthesis
Understanding how varying carbon dioxide concentration, light intensity and temperature affects the rate of photosynthesis
Describing the structure of the leaf and explain how it is adapted for photosynthesis
Understanding that plants require mineral ions for growth and that magnesium ions are needed for chlorophyll and nitrate ions are needed for amino acids
Practical Tasks
Investigating photosynthesis, showing:
the evolution of oxygen from a water plant
the production of starch
the requirements of light, carbon dioxide and chlorophyll
Maths Skills
Calculating percentage changes
Drawing graphs using SLAPUK
Practical skills in this topic
Making accurate predictions of experimental outcomes
Identify and explain the variables in an experiment
Understanding the difference between biotic and abiotic variables
Explaining how to increase the accuracy and precision of an experiment
Calculation 2 - Edexcel IGCSE Chemistry
Complete lessons and workbook
Content
Understand how the formulae of simple compounds can be btained experimentally, including metal oxides, water and alts containing water of crystallisation
Know what is meant by the terms empirical and molecular ormula
Calculate empirical and molecular formulae from xperimental data
Calculate reacting masses using experimental data and hemical equations
Calculate percentage yield
Describe the formation of carbon dioxide from the thermal ecomposition of metal carbonates, including copper (II) arbonate
Understand how to carry out calculations involving gas olumes and the molar volume of a gas (24 dm3 and 24,000 m3 at room temperature and pressure (rtp))
Testing for Ions - Edexcel IGCSE Chemistry
Content
Understanding the general rules for predicting the solubility of salts
in water:
all common sodium, potassium and ammonium salts are
soluble
all nitrates are soluble
3.common chlorides are soluble, except silver chloride
common sulfates are soluble, except those of barium and
calcium
5.common carbonates are insoluble, except those of sodium,
potassium and ammonium
Describing simple tests for the cations (positive ions): Cu2+, Fe2+ , Fe3+ and NH4+ using sodium hydroxide solution
Describe simple tests for the anions (negative ions): Cl-, Br- and I-, using dilute nitric acid and silver nitrate solution
SO42-, using dilute hydrochloric acid and barium chloride
solution
CO32-, using dilute hydrochloric acid and identifying the carbon
dioxide evolved
Writing word and symbol (full and ionic) equations for these tests