How Do Rock Layers Change? Part 2

What does erosion mean?

• Melting of rocks

• Growth of plants

• Wearing away of rock by natural forces

• Freezing of water

What is a natural bridge?

• A wooden walkway

• A carved stone arch formed by erosion

• A bridge built by animals

• A tree branch

Which tool do scientists use to measure earthquakes?

• Microscope

• Ruler

• Seismometer

• Barometer

Where do most earthquakes occur?

• At the poles

• In deserts

• Around the Ring of Fire

• On mountains

What is one thing glaciers can do?

• Explode

• Leave behind rocks and debris

• Burn plants

• Melt metal

What does a canyon look like?

• A tall hill

• A flat desert

• A deep valley with steep sides

• A sandy beach

What can the presence of fossils in rocks tell us?

• The shape of the Earth

• The weight of the rock

• Information about ancient life

• How far the rock traveled

Which layer formed first in a rock model?

• The top layer

• The middle layer

• The bottom layer

• The last added one

What do you learn by observing rock layers?

• The smell of the rocks

• How heavy the rocks are

• How Earth's surface has changed

• Where the rocks came from

Which material makes up sediment?

• Magma

• Dust

• Bits of rock and minerals

• Metal