Earth's Changing Surface Grade 6 Test Practice

Flood water pounding against a canyon wall and wearing it down

• Weathering
• Erosion
• Deposition

Glaciers dropping rock and sand to form moraines (deposition of debris)

• Weathering
• Erosion
• Deposition

Which causes chemical weathering?

• acids and oxygen
• water, wind and gravity
• abrasion
• root and ice wedging

Eroded materials are called _______________________.

• constructive

• chemical weathering

• sediments

This is an example of _____________________________.

• physical weathering

• chemical weathering

What are glaciers?

• They are winding rivers that carry sediment to a delta

• They are waves that constantly crash against the shoreline.

• are huge masses of ice that move slowly over land.

• They are sand dunes that form from wind depositing sediments.

When water freezes in cracks in rocks, it expands causing the rock to break. This is known as...

• ice breaking

• frost wedging

• ice melting

• ice cutting

The deposition of sediment at the mouth of a river is a constructive force known as a...

• Delta

• Shore

• Beach

• Pond

Which of the following increases as depth increases into the Earth? (choose all that apply)

• time

• Pressure

• temperature

• density

Which layer is plastic and has the consistency of silly putty allowing movement?

• asthenosphere
• lithosphere
• mesosphere
• crust