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Assessment
What primarily causes temperature variations on Earth?
The tilt of Earth's axis
The distance of Earth from the sun
Ocean currents
Volcanic eruptions
Which phenomenon is a significant contributor to urban temperature variations?
Heat islands
Cloud cover
Equatorial winds
Tectonic plate movement
What role do greenhouse gases play in temperature variations?
They trap heat in the atmosphere
They cool the Earth's surface
They increase sunlight penetration
They create cloud cover
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