Reading

How do plants contribute to the ecosystem?

• By providing shelter for all animals

• By moving water from the soil to the atmosphere

• By producing oxygen and food through the process of photosynthesis

• By consuming carbon dioxide from the atmosphere

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What is the water cycle?

• The process by which water moves from the ocean to the land and back again

• The cycle of water being used and reused in a household

• The process by which water evaporates, condenses, and precipitates, cycling through the Earth's system

• The seasonal cycle of rain and drought

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What role do decomposers play in an ecosystem?

• They produce oxygen through photosynthesis

• They consume living plants and animals

• They break down dead material and recycle nutrients back into the soil

• They pollinate flowers

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What is the main source of energy for the Earth's weather system?

• The Moon

• The Earth's core

• The Sun

• Wind turbines

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Choose all the different forms of energy.

• thermal energy

• chemical energy

• light energy

• electrical energy

• food energy

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Which form of energy does a solar panel use?

• thermal energy from a volcano

• light energy from the sun

• sound energy from a bomb

• chemical energy from eating food

What evidence in the pictures tells us the lights are not broken?

• the car moved

• the car light is still on

• the lights came back on later

• a man fixed the lights

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What does it mean to convert energy?

• to change one form of energy to another form

• to use up the power

• to plug something in

• to turn it off

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LED lights are more efficient because they don't give off as much ________.

• light

• sound

• electricity

• thermal energy

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What is a system?

• some things

• machines

• electricity

• parts that work together

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