Dynamic Earth

Which of the following is evidence that supports the idea of uniformitarianism?

• Flooding causes higher than normal erosion rates during wet years.

• Rates of soil erosion are much lower during droughts that last several years.

• Rates of soil erosion are much approximately the same over a period of many years.

• Flash floods cause erosion by washing away the top layer of soil in wet years.

What factor(s) change a mountain's shape from jagged and high to round and lower over long periods of time?

• deposition

• weather and erosion

• movement of continents

• collisions between continental plantes

What is a convection current?

• the transfer of energy by direct contact.

• the transfer of energy by the movement of matter

• the transfer of energy through a solid, such as Earth's crust

• the transfer of energy from a region of lower temperature to a region of higher temperature.

Which of the following occurs because of convection current?

• Tectonic plates on the crust move.

• Pressure in the crust increases.

• The mantle increases in size.

• Pressure in the crust decreases.

This principle states that younger rocks lie above older rocks if the layers have not been disturbed.

• Index Fossils

• Compaction & Cementation

• The Law of Superposition

• The Law of Crosscutting Relationship

The processes involved in the rock cycle include all of the following except:

• Condensation

• Erosion

• Weathering

• Compaction

True or False: Fossils found in the same layer of rock are from the same time period.

• True

• False

What happens to magma that is heated by the core?

• It rises.

• It sinks.

• Plate Tectonics

• It becomes part of the inner core.

When matter loses energy (gets cooler), how does that affect density?

• The matter becomes less dense.

• The matter becomes more dense.

• Density isn't affected.

Look at the image. The two continental plates are colliding. Why is the Indian Plate moving under the Eurasian Plate?

• It's larger.

• It's molten.

• It's more dense.

• It's less dense.