Other Chapters' Lyrics:
Earth Science 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 -:- Life Science 1 - 2 - 3 - 3b - 4 - 4b - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 -:- Physical Science 3
Earth Science 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 -:- Life Science 1 - 2 - 3 - 3b - 4 - 4b - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 -:- Physical Science 3
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Earth Science Chapter 10
Main points:
·
Weathering breaks down rocks
and erosion gets rid of soil.
·
Soil is important because it
holds water and prevents floods. It
nourishes plants. It’s a home to many
animal species.
·
Farmers use topsoil. Soil can come from the layer of rock at the
bottom, called bedrock.
Chapter
Summary:
·
Weathering is the breakdown of
rock into smaller and smaller pieces.
·
Mechanical weathering is the
breakdown of rock by physical means, such as by ice, wind, water, gravity,
plants, and animals.
·
When water seeps into a crack
in a rock and freezes later, the expanding ice breaks the rock.
·
Wind and water can weather
rocks through abrasion, which is the action of surfaces grinding against each
other.
·
Both plant roots and animals
dig into soil to cause erosion.
·
Chemical weathering breaks
rocks and minerals into new substances.
This can be caused by water, acid precipitation, or air.
·
Oxidation is the reaction of an
element with oxygen to form an oxide.
Rust is the most familiar result of oxidation.
·
Oxidation occurs more quickly
in warm, humid climates. This means your
bike will rust faster in
·
Bedrock is the layer of rock
beneath the loose soil.
·
The top layer of soil is called
topsoil. This layer has the most organic
nutrients which is good for plant growth.
·
Cover crops are planted between
harvests to reduce soil erosion and to replace nutrients into the soil. Soybeans and clover are common for this.
·
Farmers plant different things, a practice called crop rotation, to keep
soils nutrient-rich.