BJU Science 4 Chapter 9 Review
Terms in this set (40)
The movement of weathered material from one place to another
an area of sediment formed at the mouth of a river
happens when wind, water, or ice drop weathered material in a new location
small bits of weathered rock and other material
can cause canyons and gorges
can cause hills called dunes
water, wind, and ice
Erosion can be caused by
Deposited sediment makes the mouth of a river _______
Erosion can happen slowly or ________
a huge sheet of ice that stays frozen all year
the rapid downhill movement of a large amount of soil and rocks
a sudden downhill movement of a large amount of snow and ice
____________ can pick up sediment and rocks as they move.
Glaciers can cause hills called
Glaciers can cause ________ where ponds and lakes form
Landslides and avalanche are 2 kinds of sudden erosion caused by ________.
removing plants, paved areas
What are 2 things people can do that cause erosion?
Removing plants can ________ the amount of topsoil that erodes.
_______ areas can cause water to run off into soil that causes the soil to erode.
the layer of soil needed for many plants to grow
the process of breaking down and changing rocks that wears away the surface of the earth
The surface of the earth is always _______.
decayed plant & animal material
weathered rock, air, & humus
Soil is made up of these 3 things
sand, silt, & clay
The 3 sizes of weathered rock found in soil
Shapes of the land such as mountains and canyons
the layer that is mostly coarse, weathered rocks without humus
the solid, unweathered rock under the layers of soil
the wearing away of rock by water or wind caused by friction
loose material on the surface of the earth
Many landforms are a result of the _________ forces that wear away the earth's surface
Earthquakes and _______ can push land upward.
Most changes on the surface of the earth happen ________.
As plants grow, they can break _______.
Weathering occurs when wind, water or plants _______________ or change rocks.
1. form ponds or lakes
2. forms small hills
3. smooths and polishes rocks
4. carries rock and sediment
How can a glacier change the surface of the earth?
Gravity is a force that
layer of soil that contains humus
3 things that cause rocks to weather
process of water in and around rocks and soil freezing and expanding, breaking up the rocks