Energy

Question 1

What do we need energy for

Answer 1

Heart to pump blood around the body
Our brain to think and learn
Our muscles to move

Question 2

Where to we get energy from

Answer 2

The food we eat

Question 3

What dog food energy used to be measured in and what is it measured in now

Answer 3

Kilocalories and is now measured in joules

Question 4

1000 joules =

Answer 4

1 kilojoule

Question 5

Protein=

Answer 5

17kj

Question 6

Fat=

Answer 6

38kj

Question 7

Carbohydrates =

Answer 7

17kj

Question 8

How to we find the nerdy content of a food

Answer 8

We can burn them and use the heat released to warm known mass of water. The temperature increase of the food can help us calculate the energy content. 

Question 9

How do we calculate energy in 1g of food

Answer 9

Rise in temperature x volume of liquid x 4.2

Question 10

What factors can cause amount of energy needed to vary

Answer 10

Gender
Age
Amount of daily activity

Question 11

On average the energy a
Man=
Woman=

Answer 11

=10,470 kj
=8370 kj

Question 12

What equipment do need you need to do the energy experiment

Answer 12

Thermistor that goes in boiling tube with known water mas
Mesh to fold crisp
Stand and clamps to hold everything
Bunsen burner to burn crisp

Question 13

Why might energy calculated be slightly off

Answer 13

Some of the heat burned will gone into the boiling tube or the surrounding atmosphere