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The Grand Canyon is a result of two forces. What are they?
weathering and erosion
so scientists can warn people to evacuate the area
The ground may collapse
earthquakes and volcanoes
over 5,000 years
A medium hill with a flat top and steep sides
Ice freezes in the rock at night, cracking them
volcanoes
Why would it be helpful to the general public for scientists to predict earthquakes?
weathering and erosion
so scientists can warn people to evacuate the area
The ground may collapse
earthquakes and volcanoes
over 5,000 years
A medium hill with a flat top and steep sides
Ice freezes in the rock at night, cracking them
volcanoes
Which best completes this chart? 1. Uplift 2. Earthquakes 3.
weathering and erosion
so scientists can warn people to evacuate the area
The ground may collapse
earthquakes and volcanoes
over 5,000 years
A medium hill with a flat top and steep sides
Ice freezes in the rock at night, cracking them
volcanoes
What is a mesa?
weathering and erosion
so scientists can warn people to evacuate the area
The ground may collapse
earthquakes and volcanoes
over 5,000 years
A medium hill with a flat top and steep sides
Ice freezes in the rock at night, cracking them
volcanoes
A seismograph is a device used to measure wave movement through Earth's curst. What can it help predict?
weathering and erosion
so scientists can warn people to evacuate the area
The ground may collapse
earthquakes and volcanoes
over 5,000 years
A medium hill with a flat top and steep sides
Ice freezes in the rock at night, cracking them
volcanoes
How long has it taken the Grand Canyon to form?
weathering and erosion
so scientists can warn people to evacuate the area
The ground may collapse
earthquakes and volcanoes
over 5,000 years
A medium hill with a flat top and steep sides
Ice freezes in the rock at night, cracking them
volcanoes
Underground salt deposits can be dissoved by ground water and carried away. What may happen next?
weathering and erosion
so scientists can warn people to evacuate the area
The ground may collapse
earthquakes and volcanoes
over 5,000 years
A medium hill with a flat top and steep sides
Ice freezes in the rock at night, cracking them
volcanoes
In the spring, rocks often fall onto mountan roads. Why?
weathering and erosion
so scientists can warn people to evacuate the area
The ground may collapse
earthquakes and volcanoes
over 5,000 years
A medium hill with a flat top and steep sides
Ice freezes in the rock at night, cracking them
volcanoes
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