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 lava called when it is still inside the volcano?
Magma
Is a landslide caused by fast changes or slow changes?
Landslides are caused by both. A volcano or earthquake (fast changes) can cause landslides. Landslides can also be caused by humans chopping down too many trees over time (slow process) that hold the soil in place with their roots. They can also be caused by trees and plants dying from drought (slow change) on a steep hillside.
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 causes earthquakes?
When the tectonic plates under the earth's crust shift, it shakes the ground above it, causing an earthquake.
Explain why drought is so damaging to Earth.
Drought starves plants and trees of water. We lose their root systems to hold soil in place. Droughts are forest fire hazards. Forest fires wipe out all of the protective plants and trees. We lose their protection of the soil and we lose valuable oxygen.
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 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.
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.
How is a volcano a destructive process?
The lava burns everything in its path, destroying anything it comes in contact with.
What is the definition of weathering?
Weathering is the breaking down of rocks into smaller and smaller pieces by wind, water, or glaciers. Weathered land forms do not get carried away. They remain in the same 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
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.
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 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.
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.
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 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.
A river that was straight and is now curvy is an example of what kind of change? (Fast or Slow)
Slow change. The water follows cracks and folds in the land as it flows downhill. On its way down, the water shapes the landscape by wearing away rock and carving out a network of valleys. Since things like falling branches and storms can block one side of the river more than the other, rushing water will be blocked on one side more than the other. This is why rivers start to curve.