Problem:OPTIONS:
- The moon
- Roads
- Crops
- The sky
- homes
- biome
- soils
- Harvesting Machines

Fact 1: Uneven heating of the Earth 's surface cause wind. Fact 2: Wind can damage crops. Given the two facts above, what is something uneven heating of the Earth's Surface can damage?
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A: Crops

Problem:OPTIONS:
- direct energy
- Metling snow
- run a car
- produce electricity
- kinetic energy
- chop trees
- lift heavy objects
- enormous damage to homes

Fact 1: Wind is used for producing electricity. Fact 2: Wind Turbines Wind turbines are windmills that generate electricity. Given the two facts above, turbines are used to what?
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A: produce electricity

Problem:OPTIONS:
- h2o
- dams
- oxygen
- clouds
- carbon
- rain
- lake
- H20

Fact 1: Cycles of freezing and thawing water cause ice wedging. Fact 2: Water is made up of H2O molecules. Given the two facts above, what freezes and thaws to cause ice wedging?
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A: h2o

Problem:OPTIONS:
- Operating a factory
- Driving a car
- Riding a bike
- food and shelter
- hydrate their cells
- lowered energy cost
- Burning a fire
- peachleaf willow

Fact 1: Riding a bike does not cause pollution. Fact 2: Pollution is anything that spoils the environment. Given the two facts above, what does not spoil the environment?
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A:
Riding a bike