The breaking down of rocks and other materials on Earth's surface is called?
weathering
100
The kind of soil that is best for growing plants.
loam
100
When a material contains air spaces that allow water to seep through it is?
permeable
100
Ice wedging is a form of _________ weathering.
mechanical
100
The layer that is below the bottom layer is called the?
bedrock
200
The grinding away of rock by other rock particles carried by wind, water, ice, or gravity is known as?
abrasion
200
The loose, weathered material on Earth's surface is called?
soil
200
When rocks are physically broken up is a _________ weathering.
mechanical
200
Acid rain, oxygen, carbon dioxide, the action of water, and living organisms are all part of ________ weathering.
chemical
200
Decayed organic material is soil is called?
humus
300
The movement of rock particles by wind, water, ice, and gravity, is called.
erosion
300
The __ horizon cotains a crumbly, dark brown soil that is a mixture of humus, clay, and other minerals.
A
300
What gas causes rock-containing iron to oxidize?
carbon dioxide
300
The most important agent of chemical weathering is?
water
300
Soil that is made up of an equal amount of clay, sand, and silt.
loam
400
What 2 factors help determine the rate of weathering?
Climate and type of rock
400
What layer forms last and why?
The B horizon develops last as rainwater washes away clay and minerals from the A horizon to the B horizon.
400
While on a hike you notice a rock that is starting to break apart and has a red and brown color which is probably rust. What agent of chemical weathering caused this?
oxygen
400
At the beach you collect beach glass and this one special pieces of glass has been tumbled in the sand and now has no sharp edges. This an example of what kind of weathering and what is the type?
Mechanical weathering and abrasion
400
The loose layer of dead plant remains over the top soil.
litter
500
Name 2 things plant roots do.
Answers will vary
500
Name and describe the top layer of soil.
The top layer is the A horizon, which contains top soil a crumbly, dark brown soil that is a mixture of humus, clay and other minerals.
500
Explain the order in which the layers of soil form
Bedrock, C horizon, A horizon, B horizon
500
What is the difference between mechanical and chemical weathering?
In mechanical the rocks are physically broken down and in chemical the rock's chemical makeup in changed.
500
Name something a soil organism can do to help the soil.