P2.1 Foods and fuels Flashcards
What is energy measured in?
Energy is measured in Joules (J) , Kilojoules (kJ) (and Kilowatt hours).
How many joules are in 1 kilojoule?
1 Kilojoule (kJ) = 1000 Joules (J)
What is a fuel?
A fuel is any compound which has stored energy. Food is an edible fuel.
Give an example of a store of energy.
Stores of energy ( chemical ) includes e.g coal, chocolate, oil, wood and other fuels.
What do you need to burn foods and fuels?
You need oxygen to burn both foods and fuels.
Why is there an energy cost to everything that you do?
There is an energy cost to everything that you do because you need energy to keep your body warm, to breathe, to move and to talk.
Why do children need extra energy?
Children need extra energy because children are still growing. While you are growing you need energy for your bones, muscles and brain to grow.
Why do sportsmen need a lot more energy than an average person?
Sportsmen need a lot more energy because they are always so active; you need a lot of energy to do a lot of activities. If they don’t eat enough, they can feel tired.
Why should an adult just take in the energy they need for the activities that they do?
An adult should just take in the energy they need for the activities that they do because the excess energy they take in will be stored as fat to use in the future and they will gain weight.
What is the name of the process of burning fuel?
The name of the process of burning fuel is known as combustion.
What does your body need energy for when you are asleep? Give 1 detail.
Your body needs energy when you are sleeping for keeping warm or for breathing.
What is energy?
Energy is associated with changes in temperature or with work.
What do your daily energy requirements depend on?
Your daily energy requirements depend on your age, weight, sex and how active you are.
Where can you find the energy associated with food?
You can find energy associated food on a food label.
What do food labels tell you?
Food labels tell you how much energy is in the store associated with food (also the nutritional values stored).
