Energy and Change
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What does a carnivore eat?
Meat
What does a herbivore eat?
Vegetation
What does an omnivore eat?
Meat and vegetation
Where do humans get energy?
From food
Where do plants get water and other nutrients from?
From the soil
Describe the energy chain
Plants use light energy to make food. They store food in their bodies. Animals and people eat the plants. Carnivores eat other animals.
Describe the energy chain that involves grass, the grasshopper, the snake, the hawk and decomposers.
The grasshopper eats grass. The snake eats the grasshopper, and is eaten by the hawk. When the hawk dies, its body is consumed by decomposers.
Name two kinds of decomposer.
Bacteria and fungi
Why are decomposers important?
They break down dead material.
What is energy?
The ability to do work
What do we need energy for?
Everything
Where does energy come from?
The sun and the food we eat
Classify each of these as producers, consumers and decomposers: apple tree mushroom dragonfly daffodil cougar snake hawk carrot bamboo bacteria pigeon catfish
apple tree - producer mushroom - decomposer dragonfly - consumer daffodil - producer cougar - consumer snake - consumer hawk - consumer carrot - producer bamboo - producer bacteria - decomposer pigeon - consumer catfish - consumer
Name four kinds of energy
Sound, light, heat and movement
How are coal, natural gas and oil produced?
When animals and trees die, they get buried, and turn into fossil fuels.
What are petrol and diesel made from?
Oil
What energy transfer takes place when we burn wood?
Stored energy in the wood is turned into heat and light
What kinds of energy do we get from: the sun food petrol batteries wind electricity
the sun - heat and light food - movement petrol - movement batteries - movement, heat, light, sound wind - movement electricity - movement, heat, light, sound
What are renewable resources?
Resources that can be re-used - like wind, water, the sun
What are non-renewable resources?
Things that are gone for ever when they are used - fossil fuels
What is a system?
Two or more parts that work together to make things happen.
What is the input energy of a kettle?
Electricity
What are the input energy and output energy of a truck?
Diesel and movement
What is solar energy? How is it turned into electricity?
A solar panel absorbs sunlight and traps it as heat, which is then turned into electricity.