Energy Flashcards
What is Energy?
A quantity that can be stored/transferred ; a way of calculating which processes are possible.
Name three fuels
coal,oil, and wood
Why does our body need eneergy while we sleep?
The body needs energy to breathe and to move while we sleep.
How many joules are there is 200 kJ.
200,000
Why do children need more energy than adults?
They need more energy so that their bones can grow and their brain can grow.
How many joules are there in 1 kJ?
1000
What are the different types of energy?
Chemical, GPE,elastic, kinetic,electric, thermal, heat,nuclear
Write down two sources of chemical energy.
Foods & fuels
What forces act on a pendulum?
GPE & Kinetic energy
What forces act on a ball getting thrown up and down.
GPE & Kinetic energy
What do the symbols represent in energy transfer diagrams?
The circles show energy transfer while the squares show the energy stores.
What does energy dissipated mean?
When energy is not useful it gets dissipated in the form of thermal energy.
What is an energy transfer diagram?
An energy transfer diagram shows the energy changes in a process or device.
What is GPE?
GPE is the energy that something has because of its position.
What is kinetic energy?
Kinetic energy is the energy that something has because of its motion.
