Weathering, erosion, soils and fossils review
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WEATHERING, EROSION, SOILS AND FOSSILS REVIEW
description
Weathering, erosion, soils and fossils review. The unweathered rock that lies below the lowest layer of soil Depostion Bedrock delta. The decayed remains of plants and animals a. delta b. soil c. humus. A large mass of deposited sediments at the mouth of a river Deposition Topsoil - PowerPoint PPT Presentation
Transcript of Weathering, erosion, soils and fossils review
WEATHERING, EROSION,
SOILS AND FO
SSILS
REVIEW
The unweathered rock that lies below the lowest layer of soil
a. Depostion
b. Bedrock
c. delta
The decayed remains of plants and animals
a. delta
b. soil
c. humus
A large mass of deposited sediments at the mouth of a river
a. Deposition
b. Topsoil
c. erosion
A scientist who studies fossils and organisms that lived long ago
a. Paleontologist
b. geologist
c. physician
The loose material that covers most of the earth’s surface
a. soil
b. fossil
c. weathering
The movement of weathered rock from one place to another
a. Glacier
b. Eroision
c. topsoil
The layer of soil just below the uppermost layer of soil
a. Subsoil
b. Topsoil
c. bedrock
The uppermost layer of soil. This contains the most hummus.
a. topsoil
b. Subsoil
c. bedrock
A large mass of slow moving ice that flows down a slope
a. Bedrock
b. Fossil
c. glacier
The slow breaking or wearing away of rock into smaller pieces
a. Fossil
b. Weathering
c. bedrock
Name 4 things that cause weathering.
Remember that soil is made up of bits of rock, (sand), minerals, and materials of once living things.
Humus is made up of dead plants and animals. This is the fertile stuff that helps plants grow. It is dark brown in color.
There are 4 types of soil.
• Clay
• Sand
• Silt
• Loam
Clay is made up of small particles that pack tightly together. When wet it is sticky and smooth.
Sand is made up of coarse particles or grains. It is very gritty and water flows through easily.
Silt is soft and smooth. It is made up of smaller particles of sand.
Loam is sticky and smooth. The darker the color the more humus it contains. It is a type of dirt that farmers use to grow crops.
What are fossils?
• Fossils are found in rocks.• They help us learn about the past.• They give us clues about the
environment of that time period.
• There are different types of fossils.• Molds, casts, petrified fossils, amber
Molds
Casts
Petrified fossils form when an organism dies and it gradually disappears.
Amber is a tree resin.
