Embedded Files
https://drive.google.com/drive/folders/1eeKcN5UloBf5sAwHXf-O8ZTamBblHcWx?usp=drive_link
Go to the google drive link above. There is Chp 10 and Chp 11.
For Chp 11, create your own new google doc and then copy the questions over. You can then work in groups to come up with the answers. DO NOT USE YOUR OWN WORDS/ CHATGPT. Use the answers from the textbook, that is the SAFEST.
For Chp 10, you can either use your old doc, and add in my questions, or do a new doc. if you have questions on top of mine, do generate the answers for them too if you have time. Can't go wrong learning more right?
10.3 How does the transfer of heat energy occur?
1. Define conduction. [1m]
2. State 1 example of a good conductor of heat. [1m]
3. State 1 example of a poor conductor of heat. [1m]
4. Explain why solids are better conductors of heat than fluids. [2m]
5. Define convection. [1m]
6. Using arrows, draw the convection currents set up in the following boxes. [2m]
7. Define radiation. [1m]
8. Define greenhouse effect. [1m]
9. Explain how the greenhouse effect arises. [2m]
10. State 1 example of how greenhouse gases are produced. [1m]
11. State 1 effect of global warming.
12. State 1 effect of melting polar ice caps.
10.4 What affects the rate at which heat energy is transferred?
1. Using a diagram, describe an experiment to show that different materials conduct heat at different rates. [3m] Explain how the result of the experiment informs you of which material is a better conductor. [1m]
2. Using a diagram, describe an experiment to show that water is a poor conductor of heat. [3m]
3. State how temperature affects the rate of radiation. [1m]
4. State how surface area affects the rate of radiation. [1m]
5. State how texture and colour of surfaces affect the rate of radiation. [2m]
6. Using a diagram, describe an experiment to show that black surfaces are better absorbers of radiation than white surfaces. [3m]
10.5 How can we harness the transfer of heat energy to improve our daily lives?
1. Explain why the base of a frying pan is made from metal. [1m]
2. Explain why the handle of a frying pan is made from wood. [1m]
3. Explain how woollen clothing keeps us warm. [2m]
4. State how double-glazed windows are used to reduce heat loss through the windows. [1m]
5. Explain why air conditioners are usually placed at the top of a room. [3m]
6. Explain why heaters are usually placed at the bottom of a room. [3m]
7. Explain why the heating element of a kettle is usually placed at the bottom. [3m]
8. Explain the formation of a sea breeze in the day. [3m]
9. Explain the formation of a land breeze at night. [3m]
10. Explain why people generally wear lighter colours in tropical countries.
11. Explain why the cooling fins of a refrigerator are painted black. [1m]
12. Explain why kettles and pots are usually polished. [2m]
13. State what type of surfaces emergency blankets have and explain why. [3m]
14. State why the plates inside a solar collector are usually painted black. [1m]
15. State 5 designs of a vacuum flask that reduces heat loss. [5m]
16. State 3 ways people living in igloos can do to keep themselves warm. [3m]
17. Explain why an igloo has only one small entrance. [1m]
11.1 How do we identify a chemical change?
- Define ‘chemical change’
- Give 2 examples of a chemical change
- Define ‘physical change’
- Give 2 examples of a physical change
- State 2 differences between a chemical change and a physical change.
- (SKILL) Write a word equation given reactants and products
E.g. Upon heating strongly, mercury oxide breaks down to give mercury and oxygen gas.
Word equation:
- (SKILL) Write a word equation involving acid reactions (need to know how to obtain name of salt)
E.g. Hydrochloric acid reacts with aluminium oxide.
Word equation:
E.g. Sulfuric acid reacts with magnesium
Word equation:
E.g. Nitric acid reacts with sodium carbonate
Word equation:
- State what is meant by conservation of atoms during a chemical reaction.
- Represent the following chemical reactions using the circle diagrams(?).
E.g. Methane + oxygen → Carbon dioxide + water
E.g. Hydrogen + oxygen → water
E.g. Carbon + oxygen → carbon dioxide
11.2 What are the different types of chemical changes?
1. Define ‘combustion’ [1m]
2. Give an example of combustion. [1m] State its word equation. [1m]
3. Define ‘thermal decomposition’. [1m]
4. Give an example of thermal decomposition. [1m] State its word equation. [1m]
5. Give 2 examples of oxidation. [2m]
6. What substance can undergo rusting? [1m]
7. State the 3 reactions of acids. Identify the reaction which is known as neutralisation.
8. Describe how to test for hydrogen gas.
9. Describe how to test for carbon dioxide gas.
10. State the action of acidic/neutral/alkaline solutions on red and blue litmus papers.
11. State the colours of universal indicator at different pH values.
12. Give an example of a substance at each pH (e.g. milk’s pH = 6.5).
13. State the 2 real-life applications of neutralisation.
11.3 How do chemical changes occur?
1. State the 5 methods that can cause chemical changes to occur.
e.g. Mixing
2. State 1 example of a chemical change that happens due to each method in question 1.
e.g. Acid reacts with metals due to mixing
3. State the colour of the compounds formed when copper oxidises. [1m]
4. Describe how a silver core is coated with gold during electroplating [2m]
11.4 How does the knowledge of chemical reactions help us in our daily lives?
1. What is the chemical change during respiration [1m]
2. Define the term ‘decay’/ ‘decomposition’ [1m]
3. Why is the decay of food undesirable?
4. State 1 method to slow down decomposition of food.
5. State 4 methods to prevent rusting. [1m]
6. What does it mean to galvanise an iron rod.
7. State the sources and effects of the following air pollutants.
8. State what happens to oceans when large amounts of carbon dioxide is released into the atmosphere.
9. State 1 problem ocean acidification causes to marine life.
10. State 1 solution to tackle the effects of ocean acidification.
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