Earth Science Review

The layer of soil underneath topsoil is called-

• loam

• humus

• clay

• subsoil

Sedimentary rock forms in layers. Which layer most likely has the oldest fossils?

• Layer 6

• Layer 5

• Layer 3

• Layer 1

What causes rock to stick together and become solid rock?

• Fossils

• Soil Texture

• Pressure

• Humus

Which layer of soil usually contains humus?

• Topsoil

• Subsoil

• Weathered Rock

• Bedrock

Humus is made of-

• Weathered rock

• Fossils of ancient organisms

• Decaying plants and animals

• Minerals

Soil rich in nutrients is called-

• Humus

• Bedrock

• Clay

• Loam

Sedimentary rock is best defined as

• Rock that forms when sediments are pressed together

• A material made up of tiny pieces of weathered rock

• The remains of a plant or animal that lived long ago

• Decaying pant and animal material

Which answer best defines fossil?

• Rock formed when sediments are pressed together.

• A material made up of tiny pieces of weathered rock.

• The remains of a plant or animal that lived long ago.

• Material made up of very small grains of minerals.

Soil texture is best defined as-

• The size of soil particles

• Decaying plant and animal material in the soil

• The color of soil particles

• Soil rich in nutrients that is good for plant growth

Scientists find this fossil in an area. What can they conclude about the fossil?

• The fossil is the oldest fossil in the area.

• Reptiles turned into fish over millions of years.

• The main predators of the fish when it was alive were sharks.

• The area where the fossil was found used to be under water.