Earth Fast Change
Slow change
People can change earth
Combined
100
What happens when the volcano erupts?
1. Nothing
2. The lava flows, and it happens very slowly
3. The lava flows, and it happens very quickly
3. The lava flows, and it happens very quickly
100
What is weathering?
Breaking up a rock
100
What is a dike?
A long wall built to hold back ocean water. People build things to make dry land out of land that used to be underwater.
100
What is this called?
A dam
200
What is the hole on the top of the mountain called?
Crater
200
What is erosion?
When soil, sand, and small rocks are removed because of rain and water.
200
What is a levee? 
A short wall along a river. People build them to hold back rising water levels. Also, people build it to protect farms and cities.
300
What happens when there is an earthquake? Tell me three things.
1. The ground shakes
2. Buildings might fall down
3. Roads will break
300
What is deposition?
Wind and water move sand, soil, and small rocks and leave them in a new place.
300
What is a windbreak?
A row of objects that blocks the wind. They can be made into trees, bushes, or fences
300
What are fast changes and slow changes?
Fast:
Slow:
Fast: Volcano, earthquake, flood, landslide
Slow: Weathering, erosion, deposition
400
What happens when there is a flood?
Because of the flood ________ happens to the hills and mountains.
1. A large amount of water quickly covers the land
2. Landslide
400
Jihoo was playing at the beach. A wave comes and sweeps the sand away. What is this incident called?
1. Deposition
2. Erosion
3. Weathering
2. Erosion
400
What would people want to build to hold back ocean water?
Dikes
400
People cut down trees to build houses and make tunnels. What does this cause?
People making changes to land is a main cause of _______.
Erosion
500
What are the quick changes to Earth?
Why are they called quick changes?
Volcano, earthquake, flood
When it happens, the Earth's surface's looks changes quickly
500
What is a way weathering leads to erosion?
It breaks down rocks that can be removed by wind and water.
500
A gardener wants to protect the soil in her garden. Strong winds blow across the land and carry away the topsoil. Heavy rain also washes soil downhill.
What could the gardener do to stop the soil from blowing away?
Build a windbreak.
500
To slow down the effects, what can we do?
Stop cutting trees
Plant trees on the hillside