Flashcards in Energy and Change Deck (39)
What does a carnivore eat?
What does a herbivore eat?
What does an omnivore eat?
Meat and vegetation
Where do humans get energy?
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?
Where does energy come from?
The sun and the food we eat
Classify each of these as producers, consumers and decomposers:
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?
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 - 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?
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.
How is water energy used?
Moving water turns a wheel, which can be used to drive a pump or a grinder, or to generate electricity.
How is wind energy used?
In sails or windmills, to propel craft, or generate electricity
Give an example of movement energy being turned into sound.
What are the input and output energy of a ceiling fan?
Electricity is input, and movement is output
How are sounds made? Give examples.
Something vibrates. The surface of a drum, a guitar string, or vocal cords