Homework sets and multiple choice exam practice problems to support the learning of a unit on Acids, Bases, and Salts. All questions (124 in all!) are editable and ANSWERS are provided for each!. Learners will answer questions about: • Acid-base definitions • Hydrogen ions and acidity • pH calculations • hydrogen ion and hdyroxide ion concentrations • acid and base strength • acid dissociation constant • neutralisation reactions • salts in solution • titration calculations This resource is meant to be used by teachers in the US.

Homework sets, a practice quiz and sample test questions to support the learning of a unit on Atomic Structure. • Includes 102 questions in all! • All questions are EDITABLE and include ANSWERS. This resource is meant to be used by teachers in the US.

Homework sets and multiple choice exam practice problems to support the learning of a unit on The Periodic Table. All questions (120 in all!) are editable and ANSWERS are provided for each!. Learners will answer questions about: • Groups and periods in the periodic table • Metals, nonmetals and semi-metals in the periodic table • Transition metals in the periodic table • Properties of metals, nonmetals, semi-metals and transition metals • Electron configuration • Energy levels, sub-levels and orbitals • Periodic table trends - atomic size • Periodic table trends - ionic size • Periodic table trends - electronegativity • Periodic table trends - ionization energy This resource is meant to be used by teachers in the US.

Homework sets, practice problems and multiple choice exam practice problems to support the learning of naming and writing chemical formulae for ionic compounds, molecular compounds, acids and bases. • More than 88 questions are included • All questions are editable • All ANSWERS are included This resource is meant to be used by teachers in the US.

Homework, practice problems and a multiple choice Exam practice to support the learning of a unit on Chemical Reactions. • 90 Questions in all • Questions are editable • ANSWERS are included for every problem. Learners will: • Write word equations • Write skeleton equations • Write balanced chemical equations • Classify chemical reactions • Use the activity series to predict single replacement reactions • Write balanced net ionic equations • Identify the precipitate in double replacement reactions This resource is meant for teachers in the US.

Homework sets, a worksheet and sample test questions to support the learning of chemical quantities, the mole, conversions between mass, volume and mole, percent composition and empirical formula. • 72 questions in all • All questions are editable • All ANSWERS are included This resource is meant to be used by teachers in the US.

Homework sets with ANSWERS and multiple choice exam practice problems to support the learning of Covalent Bonding. • Includes 87 questions in all • All questions are editable • All answers are included Topics covered in these questions include: • molecular compounds • covalent bonding • molecular shapes (VSEPR theory) • hybrid orbitals • polarity • and intermolecular forces. This resource is meant to be used by teachers in the US.

Homework sets with ANSWERS, a worksheet and plenty of sample test questions to support the learning of a unit on Ions, Ionic Bonding, Ionic Compounds and Metallic Bonding. • 87 editable questions in all • All ANSWERS are included This resource is meant to be used by teachers in the US.

Homework sets, a worksheet and sample test questions to support the learning of Gas Properties and the Gas Laws. 74 problems in all. Can be recycled year after year. All questions are EDITABLE and all ANSWERS are included. This resource is meant to be used by teachers in the US.

This 45-slide PowerPoint and accompanying Lesson Notes teaches the strength of acids and bases. Learners often have misconceptions related to 'concentration' and 'strength' in reference to acids and bases. One of the aims of this lesson is to correct this misconception. The other main aims are listed below. A worksheet (with answers) to practice pH and pKa calculations is also included. By the end of this lessons, students will: 1) discuss and share their initial conceptions of acid strength. 2) be able to define strong acids and weak acids 3) be able to relate the strength of an acid to the value of its acid dissociation constant, Ka 4) learn to calculate an acid dissociation constant 5) be able to differentiate between concentrated acid and strong acid 6) identify common strong and weak acids and bases in everyday life 7) Calculate the pH of strong acid solutions 8) Calculate the pH of weak acid solutions I hope you find this lesson useful. FREE BONUS w/purchase: To receive one of my new paid resources as a free gift, please visit my website. The link can be found at my Store (click on my username).

**This resource has been recommended by the TES Resource Team** Get your learners thinking about electricity and electric circuits. My most popular resource includes: • A lucid and logical 69-slide PowerPoint which includes many visual aids. The slides are thoughtfully animated (not over-animated) to allow opportunities for learners to participate and promote class discussions. • Seven pages of interactive notes (scaffolded notes). These notes fit perfectly with the presentation. I find this activity keeps lower-level students engaged during the lessons while allowing differentiation for higher achievers. • A crossword (with answers), some homework questions and a quiz. **Just print and go! Or customize to fit the needs of your class.** Learning objectives covered in this resources are listed below. • By the end of these lessons, pupils should know: 1. that electricity is a form of energy. 2. that current electricity can be produced from cells, batteries or the mains 3. that there are a range of appliances in the home, which use electricity. 4. that we can represent components by symbols. 5. that current electricity flows in conductors but not in insulators. 6. that a complete path is needed from one side of the battery to the other for electricity to flow. 7. how a switch works. 8. that there are two types of circuit, series and parallel. 9. that current is measured in Amps. 10. that current is measured using an ammeter. 11. how to connect and use an ammeter. 12. that in a series circuit, the current is the same all the way round the circuit. 13. that in a parallel circuit, the current is shared but not lost or used up. 14. that the current in a series circuit depends upon the number and type of components used. 15. that a battery is a store of electrical energy. 16. that voltage is a measure of the amount of energy or push given to the current. 17. that more cells in series equals more voltage. 18. that the effect of voltage upon current and bulb brightness. 19. that an electric current causes a wire to become hot. . 20. that the bigger the current, the higher the temperature of the wire. 21. that if too much current flows, the wire will melt. Hope you find it useful. Your feedback is much appreciated.

*UPDATED January 2017 - More support worksheets added* This resource includes a 56 slide PowerPoint presentation, four activity worksheets, a mind map, a short quiz and a 34-question unit test. Everything is ready to be used or easily edited to suit your learners. • Includes sound clips to bring the learning to life • Animations have been thoughtfully used to promote participation from lower achieving students and discussion from higher ability ones. • 26 learning outcomes listed below By the end of these lessons, pupils will: 1. recognise that sound is made by objects that vibrate 2. define that the frequency of vibration of the source is measured in Hertz (Hz) 3. discuss how sound is made in different musical instruments 4. know that a vibrating source causes the layers of air around it to move 5. discover that sound travels by compressing and expanding the surroundings 6. express that sound travels as a longitudinal wave 7. discover that sound travels best through solids and worst through gases because of the arrangement of the particles 8. explore the relative speed of sound in different mediums 9. explain that sound waves cannot travel through a vacuum because there are no molecules 10. know that sound waves detected by the ear cause the ear drum to vibrate 11. explore the structure of the ear 12. describe how sound is transmitted through the ear to the brain 13. know that different people have different ranges of hearing 14. know that the average human range of hearing is 20 to 20,000 Hz 15. define that loudness is measured in decibels (dB's) 16. discuss that 0 dB is the threshold of hearing and 130 dB's is the threshold of pain whilst 140 dB's causes damage 17. discuss that loud sounds can have permanent and temporary effect on the ear 18. discuss some common causes of ear damage 19. define that noise is unwanted sound 20. discover that a loud sound is produced by a large vibration and vice versa 21. discover that a high pitched sound is produced by a very frequent (quick) vibration and vice versa 22. know that an microphone can change sound to electricity and that this can then be displayed on an oscilloscope 23. know that the wave displayed on an oscilloscope is a transverse wave 24. demonstrate how to identify the amplitude, the wavelength and the frequency of a wave 25. recognise the link between the loudness of the sound and the amplitude of the wave 26. recognise the link between the pitch of the sound and the frequency/wavelength of the wave Cheers!