Earth Changes Review

Front

What is erosion?

Back

Erosion is the process by which soil and rock are removed from the Earth's surface by natural forces such as wind or water.

Front

What causes soil to become loose?

Back

Soil can become loose due to factors like heavy rainfall, lack of vegetation, and erosion.

Front

What is a fossil?

Back

A fossil is the preserved remains or traces of a once-living organism, often found in sedimentary rock.

Front

What does it mean when we say the environment changed from sea to land?

Back

It means that an area that was once covered by water became dry land over time.

Front

How do rivers shape canyons?

Back

Rivers shape canyons by eroding the rock and soil along their banks, making the canyon wider and deeper.

Front

What is the significance of the fossil record?

Back

The fossil record provides evidence of how life has changed over time and helps scientists understand the history of the Earth.

Front

What can we learn from the layers of rock?

Back

The layers of rock can tell us about the different environments that existed at various times in Earth's history.

Front

What is a trilobite?

Back

A trilobite is an extinct marine arthropod that lived millions of years ago and is often found as a fossil.

Front

Why do some fossils appear in deeper rock layers?

Back

Fossils in deeper rock layers are usually older because sediment builds up over time, burying older layers beneath newer ones.

Front

What role do plants play in preventing erosion?

Back

Plants help prevent erosion by holding the soil in place with their roots and reducing the impact of rain on the soil.