Energy In Food

Question 1

What is the formula to find out how much energy is in food?

Answer 1

Energy in 1g of food = rise in temperature x volume of water x 4.2

Question 2

If the rise in temperature was 50c and the volume of water was 100cm, how much energy would there be?

Answer 2

50c x 100cm3 x 4.2
=21 000 joules
=21kj

Question 3

Write a sentence to describe the pattern between the amount of energy and the amount of fat.

Answer 3

When there is a lot of fat there is a lot of energy but when there is little fat there is not much energy

Question 4

“1 g of protein provides us with _____ Kilojoules (kJ)
1 g of fat provides us with ____ Kilojoules (kJ)
1 g of carbohydrate provides us with ______ kJ

Answer 4

17
38
17

Question 5

Which of the following foods has the most amount of energy per gram?

Carbohydrates
Fat
Protein
Fibre

Answer 5

Fat

Question 6

How many joules are in one kilojoule?

Answer 6

1000

Question 7

Repeating experiments improves what?

Answer 7

Reliability