Rocks get worn away by weathering and sand can get eroded away
100
What are the layers of the Earth?
Crust, Mantle, Outer Core, Inner core
100
Why are rivers and harbors dredged?
To help boats pass through
100
What is the movement of rock pieces, or sediments from place to place?
What is erosion?
200
Why are most caves made of limestone?
Acid rain dissolves limestone easily
200
____ happen mostly in the Ring of Fire
What is volcanoes
200
When are reservoirs formed?
When water collects behind a dam
200
True or false? The earth's outer layer is a topographic map.
What is False?
300
Name 3 examples of deposition.
Possible answers: waves dropping sand on a beach, deltas forming at the mouth of a river, and layers of sediment forming at the bottom of the ocean.
ANSWERS MAY VARY
300
What do seismographs measure?
What is seismic waves
300
What is the purpose of a seawall?
To receive ocean waves, especially at high tide
300
What is the breaking down of rocks into pieces of measurement?
What is Weathering?
400
How does a delta form?
When a river meets an ocean and speeds up, causing sediment to drop out and form a delta
400
How are fold mountains formed?
What is when two plates collide and force layers of rock into folds?
400
Name 3 causes of beach erosion.
What is dredging, jetties, and dams?
400
What is the Crust?
What is the outermost layer of earth?
500
What are the 3 agents of erosion?
What is wind, water, and ice
500
After a volcano explodes, what does it form?
What is a bowl shaped mouth called a crater?
500
What are 3 ways to protect our beaches?
What is beach nourishment, seawalls, and leaving beaches free from development?
500
What is contour lines?
What are lines on a topographic map that indicate areas with the same elevation of height above sea level?