| In your jotter write the DATE in the margin. Now add a TITLE for your homework. Your title should be the name of the Homework: Chemical Changes Homework Week 6 |
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| Question 1. | |
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| Question 2. | |
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| Question 3. | |
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| Question 4. | |
| A pupil reacted 3g of calcium carbonate with 50 cm3 of dilute hydrochloric acid at room temperature.
Suggest 2 ways in which the pupil could increase the rate of reaction. |
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| Question 5. | |
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| Sajeed investigated the energy content of foods. He set up six experiments. In each experiment, he burned the food and timed how long it took for the water temperature to rise by 25 ºC. Which two experiments should Sajeed compare to find out whether peanuts or biscuits have more energy? | |
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| A | A & C |
| B | A & D |
| C | F & C |
| D | F & D |
