Amplify Science - U3Ch4 Test - 4th Grade

Front

What is erosion?

Back

Erosion is the process by which natural forces like water, wind, or ice wear away rocks and soil.

Front

What force of nature is primarily responsible for eroding canyons?

Back

Water is the primary force of nature that erodes canyons.

Front

Which canyon is deeper, Desert Rocks Canyon or Keller's Canyon?

Back

Desert Rocks Canyon is deeper than Keller's Canyon.

Front

What happens to rocks in a river over time?

Back

Rocks in a river can be eroded and worn down by the flowing water.

Front

How do rivers that flow for a longer time affect erosion?

Back

Rivers that flow for a longer time erode more rock compared to those that flow for a shorter time.

Front

What is the BIG question we were trying to answer in this chapter?

Back

The BIG question was: Why did more rock layers get exposed in Desert Rocks Canyon than in Keller’s Canyon?

Front

What is the role of wind in erosion?

Back

Wind can erode rocks and soil, but it is less effective than water in forming canyons.

Front

What is a canyon?

Back

A canyon is a deep valley with steep sides, often carved by the erosion of a river.

Front

Why do some canyons have exposed layers of rock?

Back

Canyons have exposed layers of rock due to erosion that removes the top layers, revealing the layers underneath.

Front

What is the difference between fast and slow rivers in terms of erosion?

Back

Fast rivers erode more rock than slow rivers because they have more energy to move sediment.