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Earth's Changing Surface - Test Prep
Terms in this set (36)
What land form do erupting volcanoes and up lift create?
The Earth's crust is made up of what seven major parts that "float" on the mantle and crash into each other. What are these parts called?
plates or tectonic plates
What causes volcanoes to erupt?
pressure, trapped gases, and molten rock
What is the theory called that explains continental drifting?
Where are the oldest rocks in the Grand Canyon found - top or bottom?
What natural forces created the Grand Canyon?
uplift, weathering, and erosion
What sign tells scientists that a volcano is about to erupt?
increasing vibrations in the Earth
Earthquakes can be caused by what?
plates sticking then suddenly moving, or faults suddenly slipping
Tectonic plates are always on the move. (True or False)
What does a seismograph measure?
vibrations in the Earth
How much will Mount Timpanogos change in your lifetime?
Erosion causes quick changes to Earth's surface. (True or False)
A volcanic eruption causes a quick change to Earth's surface. (True or False)
What is it called when sand is dropped from wind or water that is slowing down?
What is the very middle of the Earth called?
What is the surface layer of the Earth called?
What is the layer of Earth called that is made up of liquid iron and nickel and gives Earth its magnetic field?
Which layer of the Earth is the thinnest?
What is the layer of Earth made up of molten rock just below the crust called?
What layer of the Earth is the hottest of all the layers and is made up of solid iron and nickel?
Imagine an Earth with no weathering or erosion. What would it look like?
round and smooth; no mountains, valleys, or land forms
What natural force would cause a valley shaped like a V?
What natural force would cause a valley shaped like a U?
If you moved away and came back in 50 years, how much would American Fork Canyon have changed?
(Huge Changes, Just a Little, or Not At All)
Just a Little
Which of nature's forces causes the most erosion?
(wind, water, sand, ice)
What does MYA mean in terms of geological time?
Millions of Years
How long does it take glaciers to carve out a valley?
A. 10 years
B. 100 years
C. 1,000s of years
D. 2 days
1,000s of years
What natural forces create land forms we call arches?
sand, wind, and water
What happens when water gets into cracks and freezes?
When rivers enter an ocean, the current slows down and sand is dropped. What is this process called?
What causes uplift?
pressure from under the crust pushing up
What does uplift create
hills and mountains
What does a seismograph measure?
A. Earth's soil types
B. A graph of the Earth's landforms
C. vibrations on the Earth's surface
What is weathering?
A. movement of broken down rocks
B. breaking down of rocks
C. clouds, sunshine, rain, and snow
In terms of geology, what is deposition?
A. putting money into the bank
B. depositing clothing for needy people
C. the position of volcanoes
D. dropping down of sand when wind or water slow down
What is a geologic "fault"?
A. a break or fracture in the earth's crust
B. who's to blame for earthquakes
D. deposition of sand
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