Energy In Food Flashcards
1
Q
Where do we get energy?
A
In the food we eat
2
Q
How many joules are in a kilojoule?
A
1000 joules = 1 kilojoule (kj)
3
Q
How many kilojoules does one gram of protein give us?
A
17 kilojoules
4
Q
How many kilojoules does one gram of fat give us?
A
38 kilojoules
5
Q
How many kilojoules does one gram of carbohydrate give us?
A
17 kilojoules
6
Q
Why do we need energy?
A
- for our heart to pump blood around the body
- for our brain to think and learn
- for our muscles to move
7
Q
What is the equation we can use to work out the energy in 1g of food?
A
rise in temperature x volume of water x 4.2 KJ
