A
Is a volcanic eruption a fast of slow change?
Fast. The lava instantly changes everything it touches.
Is an earthquake a fast or slow change?
Fast. An earthquake instantly changes the land above and around it.
Is erosion a fast or slow change?
Slow. It takes many years (sometimes thousands of years!) for erosion to change the earth.
What is the definition of weathering?
It is the breaking down of rocks into smaller and smaller pieces by wind, water, or glaciers.
Name ONE type of fast land change.
Tornadoes, avalanches, mudslides, floods, tsunamis, etc.
Name a large body of ice that moves very slowly.
A glacier
Name ONE fast land change that has not been mentioned before.
Tornadoes, avalanches, landslides, mudslides, floods, tsunamis, etc.
What is lava called when it is still inside the volcano?
Magma
Name ONE kind of slow land change.
Possible responses:
Mountain height being worn down from weathering and erosion.
Fantastic boulder formations due to wind weathering and erosion.
Riverbanks being changed due to weathering and deposition.
What can be formed by a large river running across the earth's surface for thousands of years?
A canyon.
Name the starting point of rivers.
The start of all rivers is called the source.
When water gets into cracks in the ground, erosion can cause the water to wear away at the land underground. Over a long period of time, what will form underground?
A cave and/or an underground canyon
What is the definition of erosion?
What is the difference between erosion and weathering?
Erosion is the wearing down of landforms by wind, water, ice, and gravity. Erosion moves sediment from one place to another.
Weathering is the same thing except the landform is not carried away. It stays in the same place.
What causes earthquakes?
When the tectonic plates under the earth's crust shift, it shakes the ground above it, causing an earthquake.
Name at least two other natural disasters that can be caused by an earthquake.
Landslides, mudslides, volcanic eruptions, tsunamis, avalanches
How can humans and animals create both fast and slow changes to the earth?
We can create fast changes by constructing buildings, cutting down trees, making roads, etc. We can create slow changes with things like pollution, recycling, endangering animals, protecting animals, etc.
Earthquakes can be very destructive, but they can also be constructive. Constructive means "building" or "making". How are earthquakes constructive?
Sometimes earthquakes can create new landforms such as mountains.
What is deposition?
Deposition is when sediment is deposited or "dropped" in a new location. The root word, "Deposit" is in the word, Deposition.
How is a volcano a constructive process?
The lava can harden to make a new landform, like an island. Also, the soil left behind after a volcano is very rich and good for planting in.
How are humans and animals destructive to the earth?
Think of the negatives things done that cause harm to landforms.
Cutting down forests, destroying habitats, water and land pollution, plastic and waste dumped into oceans
How is an earthquake a destructive process?
It shakes the earth, cracking open the ground, causing buildings to fall, destroying roads, breaking trees, etc.
How is a volcano a destructive process?
The lava burns everything in its path, destroying anything it comes in contact with.
How is erosion a destructive process?
Erosion is when things are broken into smaller pieces and taken away little by little from water, wind, or ice. Erosion wears rocks into smaller rocks bit by bit through water, wind, and ice (glaciers), the earth's crust, and other landforms. Think of Erosion ~ Erase.Erosion is a slow change. Examples: Running rivers, desert plateaus, cliffs by the ocean or sea.
What is the channel of a river?
What is the course of a river?
The channel is the body of water that makes up the entire river.
The course is the direction of a river.
Give 1 example of a fast land change and describe it.
Give 1 example of a slow land change and describe it.
Fast Changes: Tornadoes, avalanches, mudslides, floods, tsunamis, etc.
Slow Changes: Changing river banks, Deltas, Desert Plateaus, Cliffs, Sand Dunes, and Big Boulders by the Ocean or Sea.
What is a landform that is surrounded by water on 3-sides? Can you name one?
What is a landform that is entirely surrounded by water? Can you name one?
Peninsula. - Florida, Italy
Island - Hawaii, Fiji
How are rushing rivers constructive? Name an example.
Rivers carry sediment to the mouth where they often build DELTAs. Rivers can build a left or right bank through deposition. This means they carry sediment from one place and deposit or "drop" it in a different place.
How can landslides be prevented? Give at least ONE example of something that reduces landslide risk.
Planting trees and plants with very extensive roots to hold soil in place.
Use huge wire netting on steep mountain slopes and hillsides to hold dirt and rocks in place.
Build high and strong barriers and walls that block dirt and rocks at the bottom of landslide-prone areas.