Unit 3 Test

When Earth's plates meet at plate boundaries and interact, they move in three different ways. Some plates slip past another but might get stuck. If they get stuck and release suddenly, they may cause...

• earthquakes
• volcanoes
• seafloor spreading
• subduction

The Hawaiian Islands are in the middle of a tectonic plate, far away from a plate boundary. The Hawaiian islands are made up of many volcanic islands. These volcanic islands are a direct result of the tectonic plate...

• being forced under another tectonic plate at a subduction zone
• colliding with another tectonic plate and being forced upward
• applying great pressure on the crust causing constant earthquakes
• moving over a hot spot where magma breaks through the crust

Friction is the process that prevents tectonic plates from ______________ past one another continuously and can cause buildup of stress in a fault like the San Andreas.

• subducting
• colliding
• slipping
• pulling

An earth science student watched a lava lamp and it reminded them about the convection currents they learned about in class. How do these convection currents drive the motion of Earth's plates?

• Ocean water rises as it warms and falls as it cools to move the plates.
• Hot melted rock rises and cooler rock sinks in the mantle, forming currents that move the plates.
• Melted rock rises and falls, the currents move the mantle while the crust remains in place.
• The crust moves in a current to drive the motion of the water in the oceans.

Which of the following provided evidence for Wegener's hypothesis?

• differences in sea-level heights
• earth's internal pressure changes
• fossil records
• magnetic polarity

Rift valleys can be found at ___ plate boundaries.

• convergent
• divergent
• transform
• passive

Active continental margins where an oceanic plate sinks into the mantle are called ___ zones.

• divergent
• transform
• terrigenous
• subduction

Which of Earth's layers contains a region where rock is soft and can flow very slowly because of heat inside the planet?

• crust
• lithosphere
• mantle
• outer core
• inner core

Which of Earth's layers would be most affected by the formation of a mountain chain?

• outer core
• lithosphere
• mantle
• inner core

Into which of Earth’s spheres would you classify mountains such as the Rocky Mountain range?

• atmosphere
• biosphere
• geosphere
• hydrosphere