Earth Changes
Earth Changes 2
Volcanoes
Earthquakes
Earthquakes 2
100
The movement of sediment (sand, rocks, and soil) from one place to another
What is erosion?
100
The physical breaking up of the Earth's surface into smaller pieces of rock or sand
What is weathering?
100
An instrument used to measure earthquakes and volcanoes
What is a seismograph?
100
A crack in the Earth's crust where earthquakes have occurred and are likely to occur again
What is a fault?
100
A numerical scale used to express the strength of an earthquake
What is the Richter Scale?
200
In the spring, rocks often fall onto mountain roads. Why? A. The rocks have grown during the winter B. Ice freezes in the rock at night, cracking them C. The days are longer with more light D. The snow is no longer holding them
B. Ice freezes in the rock at night, cracking them.
200
Part of Earth's surface is pushed up above the surrounding land by great forces of heat and pressure within the Earth A. Deposition B. Uplift C. Fault D. Geological
What is uplift?
200
An area in the world where many volcanoes are located
What is the Ring of Fire
200
The most powerful shockwaves from an earthquake
Secondary waves or S-waves
200
Scientist who studied earthquakes
What is a seismologist?
300
A butte is a small hill with a flat top and curved sides. What two sources are likely to have made this landform? A. Earthquakes and Volcanoes B. Weathering and Wind Erosion C. Water Erosion and Uplift D. Glaciers and Ice
B. Weathering and Wind Erosion
300
How long does it take for a glacier to carve a valley? A. less than a year B. 10 to 20 years C. 100 years D. Thousands of years
D. Thousands of years
300
The term for lava before it has exited the volcano
What is magma?
300
The point on the Earth's surface directly above the focus. The first place on the surface to feel the effects of an earthquake.
What is the epicenter?
300
A large wave caused by an underwater earthquake
What is a tsunami?
400
Imagine a small hill. In 100 years, how will this hill change? A. It will change very little B. It will be half its size C. It will be gone D. A hole will form in the ground
A. It will change very little
400
How long did it take for the Grand Canyon to form? A. 100 years B. 1000 years C. 2000 years D. Over 5000 years
D. Over 5000 years
400
Name at least two kinds of volcanoes
Cinder cone, composite, shield, lava dome, etc
400
Rocks that move in opposite horizontal directions (a ____ _____ fault)
What is a strike-slip fault?
400
The point in the Earth where seismic waves originate
What is the focus?
500
What causes earthquakes, volcanoes, and uplift of Earth's surface? A. The pull of gravity from the moon and sun B. Movement of the Earth's crust C. New rocks forming on Earth's surface D. Objects from space that strike Earth's surface
B. Movement of Earth's crust
500
The super continent that existed before our seven continents were formed
What is Pangaea?
500
Name two famous volcanic eruptions
.
500
City in California which had major earthquakes in 1906 and 1989
What is San Francisco?
500
The name of a large fault in California
What is the San Andreas Fault?
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