Gr 4 Energy term 3 Flashcards
What does the amount of energy that we need to live depend on
Your age
How active you are
How healthy you are
Your gender
Where do people get their energy from
Food
The sun is a ….
Ball of burning gas
What is the energy from the sun in the form of
Heat and light
What do plants need to grow and make food
Water
Soil
Sunlight
What is the process called that plants absorb energy from the sun
Photosynthesis
How does photosynthesis work
Plants take in the light energy from the sun through their leaves. This helps them to grow and store food.
What is energy transfer
Energy from the sun is absorbed into grass and plants. Animals such as cows eat grass, the energy from the sun is now in the cow. We drink milk and then the energy is passed onto the person
Energy transfer timeline
Sun —- energy—- grass—- energy—- animal —- energy —- human
Energy/food chain
Sun Grass Grasshopper Rat Snake Eagle
Why do we need energy
Everything needs energy, nothing can happen without energy
How does energy in food help us
Energy in food gives us energy to move
How does energy in wood help us
Energy from the sun is stored in wood in trees, when we burn wood it give us heat and light energy
How does energy in coal help us
Coal gives us heat and light
How does energy in oil help us
Used for petrol, diesel, paraffin and candle wax
How does energy in natural gas help us
Used to make heat and light
What is input energy
Input energy is the energy that makes machines and appliances work for us. If it is plugged into the wall an appliance uses electricity as an input source.
What is output energy
Output energy is the work that appliances and machines do that help us
Name 5 sources of energy
Electricity Gas Batteries Petrol Diesel
Name 4 different output energies
Heat
Light
Movement
Sound
What is the output energy of musical instruments
Sound
How can input energy be put into a musical instrument
Plucking
Beating
Blowing
Shaking
How does energy affect volume
Loud sounds use a lot of energy
Soft sounds make small vibrations that only use a little energy
What is pitch
How high or low a sound is
