Questions on Energy Sources
Q8. Peter burns a piece of crispbread to find out how much energy is stored in it. Energy from the burning crispbread raises the temperature of the water in the test-tube.
(a) Describe one way Peter has arranged the apparatus so that he is working safely.
2 marks
(b) Peter wants to find out if potato crisps contain as much energy as crispbread. He does the experiment again using a piece of potato crisp. Suggest two things he must do to make the experiment a fair test.
1 mark
The table shows some of the nutritional information from a packet of crispbread and a packet of potato crisps.
(c) Peter burns 1.0 g of potato crisp instead of 1.0 g of crispbread in a similar experiment. What result will he get when he burns the potato crisp?
A |
The change in the temperature of the water will be greater. |
B |
The change in the temperature of the water will be the same. |
C |
The change in the temperature of the water will be smaller. |
D |
There will be no change in the temperature of the water. |
1 mark
(d)
(i) Fibre contains energy. Explain why this energy can not be used by the human body.
1 mark
(ii) Use the table in part (b) to give two reasons for choosing crispbread rather than potato crisps as part of a balanced diet.
2 marks
(e) Crispbread does not contain vitamin C. Which of the foods in the list below is the best source of vitamin C?
1 mark
Maximum 8 marks
About this site
