Environmental Science Dynamic Earth

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.

True or False: Because we rarely witness dramatic changes to the Earth, we can conclude that the Earth is not changing very much.

• 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.

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.

Volcanoes most commonly form…

• near tectonic plate boundaries.
• in Earth's polar regions.
• along Earth's equator.
• in the middle of tectonic plates.

Where are most ocean trenches located?

• at the boundary between two plates
• at the center of oceanic plates
• at the center of continental plates
• beneath very wide mountain ranges

How might two lithospheric plates interact with each other?

I. They can collide with each other.

II. One plate may slide under another plate.

III. They can slide past each other.

• I, II, and III

• I and III only

• II only

• II and III only

Earth's lithospheric plates

• are constantly in motion.
• do not move.
• move only once.
• move only up and down.

Which of the following is true about the lithospheric plates?

• they constantly move
• they move annually
• they move occasionally
• they never move