Unit 2

What effects on the environment will change erosion?

• planting trees
• removing trees
• planting crops
• all of the above

What are the processes that change Earth's surface?

• Weathering and erosion
• soil
• canyons
• conservation

What type of weathering occurs at a slower rate?

• chemical
• physical/mechanical

What type of erosion occurs a slower rate?

• wind
• water
• gravity
• glaciers

What processes form canyons

• weathering
• erosion
• scientists
• both weathering and erosion

What processes form arches?

• water
• wind
• neither
• both

If the Earth is so old, then why is it that Scientists cannot find rocks that are as old as the Earth?

• They were taken away by aliens
• They were eroded away
• They were broken by cavemen
• They were broken apart by trees

Why is plowing important for farming?

• it helps the crops
• it helps prevent erosion
• it helps the soil
• it helps the farmer

The process that breaks down rocks through chemical changes is?

• chemical weathering
• mechanical weathering
• erosion
• wind

The process that physically breaks rocks into smaller pieces is?

• mechanical weathering
• chemical weathering
• erosion
• water