Show:
Rocks
Forms of Land
Erosion
Minerals
Soil
100
A ___ is nonliving, solid matter from the earth.
mineral
100
A mountain is one kind of ___.
landform
100
The moving of weathered rocks and soil is called ___.
erosion
100
A ___ rock is a rock with different layers of sand, dirt, or soil pressed together.
sedimentary
100
Years of weathering of rocks in minerals and the ___ of dead plants and animals form soil.
decaying
200
The breaking and changing of rocks is called ___.
weathering
200
When windblown sand piles up, a ___ is formed.
dune
200
In some places, such as at the mouth of a river, materials moved by erosion help build new ___.
land
200
When igneous and sedimentary rocks are pressured and heated from deep in the earth they turn into ___ rocks.
metamorphic
200
Soil is inportant because plants and animals depend on soil for ___.
nutrients
300
The movement of rocks along a fault may cause an ___.
earthquake
300
A mountain formed by hardened lava is a ___.
volcano
300
Erosion often causes poblems, especially for ___.
farmers
300
Some ___ rocks are made from magma that cools below the earth's surface.
igneous
300
Soil is inportant because it hold ___ that plant need.
water
400
A ___ is a crack in the earth's crust along which rocks move.
fault
400
How is a volcano formed?
Hardend lava stacks up to build a mountain.
400
Years of ___ and ___ can really change what an area looks like!
weathering erosion
400
Minerals have ___ properties such as luster, hardness and color.
physical
400
Soils are different because they form from different kinds of ___ and ___.
rocks minerals
500
The breaking and changing of rocks is called ___.
weathering
500
___ also change the shape of land.
earthquakes
500
___ erosion is especially noticeable in a desert
Wind
500
A ___ is the hardest mineral.
diamond
500
___ does not soak into clay quickly, but clay can hold a lot of ___.
water water