What process works with weathering to change the Earth's surface?

• erosion

• solar flares

• gravity

• change of seasons

What does elevation describe?

• how much erosion has occurred

• how deep an ocean is

• how far above sea level a land formation or location is

• how many square miles a country has

What is one effect of deforestation?

• Landslides and erosion occur on deforested lands.

• The atmosphere is enriched with more oxygen.

• Forests can be fully restored within just a few years.

• Natural habitats for animals can be easily found elsewhere.

Why are cities often warmer than areas in the countryside?

• Cities have more parks.

• Cities have more lights.

• Cities consume more water.

• Cities have more metal, asphalt, and concrete surfaces.

How long doe it take tectonic plates to move enough to create landforms?

• plate movement does not create landforms

• hundreds of years

• plates move abruptly and quickly to create landforms

• millions of years

What force has caused the fastest change in Earth's environment in the last 50 years?

• volcanic eruptions

• human actions

• weathering

• erosion

Why do high mountain climates have variable conditions?

• The sun's rays are less direct in high mountain climates.

• One side of the mountain is always shielded from the sun and winds.

• The atmosphere cools with increasing elevation.

• The atmosphere warms with increasing elevation.

What percentage of the Earth's water is saltwater?

• 97%

• 45%

• 70%

• 85%

Which natural force has caused the Appalachian Mountains to become rounded and crumbled after millions of years?

• gravity

• weathering

• Earth's rotation

• lightning strikes

What causes earthquakes and volcanoes?

• the Earth's tilt

• plate movement

• the moon's pull on the Earth

• solar flares