24.3-7th grade

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1.
5 points
When air moves, it picks up loose material and _________ it to other places.
2.
5 points
Wind erodes Earth's surface by ___________ and abrasion.
3.
5 points
The _________, coarser material is left behind.
4.
5 points
Abrasion is similar to _____________.
5.
5 points
__________ acts like a sandblasting machine, bouncing and blowing sand grains along.
6.
5 points
These sand grains strike against __________ and break off small fragments.
7.
5 points
These areas have fewer _________ to hold the sediment in place.
8.
5 points
However, ___________ do occur.
9.
5 points
Most sandstorms occur in deserts, but they can occur in other ______ regions.
10.
5 points
Silt and _______ particles are small and stick together.
11.
5 points
Where the land is ________, dust storms can cover hundreds of kilometers.
12.
5 points
In the 1930's, silt and dust picked up in _________ fell in New England and in the North Atlantic Ocean.
13.
5 points
Therefore, one of the best ways to slow or stop wind erosion is to plant ________________.
14.
5 points
People in many countries plant vegetation to reduce wind _______.
15.
5 points
Tree belts also trap snow and hold it on __________.
16.
5 points
Along many seacoasts and deserts, vegetation is ________ to reduce erosion.
17.
5 points
Grass ____ are shallow and slender with many fibers.
18.
5 points
These wind deposits of fine-grained sediments known as ________.
19.
5 points
The wind sweeps ___________ or over the obstacle.
20.
5 points
A __________ is a mound of sediments drifted by the wind.
21.
5 points
_________ are common in desert regions.
22.
5 points
A sand dune has _____ sides.
23.
5 points
The side facing the wind has a __________ slope.
24.
5 points
The open side of a _________ dune faces the direction that the wind is blowing.
25.
5 points
When dunes and loess form, the _________ changes.