6th grade Unit 2 CDA Inside the Earth Review Answers

Both the temperature and pressure increases As you move from the mantle to the core, how would you describe the temperature and pressure? Both the temperature and pressure increases

Describe a landform that is shaped by volcanic activity. An island grows larger when liquid rock flow from the Earth’s mantle and cools on the surface.

Describe the crust density compared to the mantle’s density. Since the crust lies on the mantle then the crust should be less dense than the mantle.

The crust is a thin hard layer consisting of various minerals. Describe the crust. The crust is a thin hard layer consisting of various minerals.

How can volcanic activity shape the lithosphere? It can shape the lithosphere by rising mountains and adding rock from cooling magma.

At one time Alaska was much warmer than it is now. If you found a fossil of a tropical plant today in Alaska, what would this tell you about the climate of Alaska? At one time Alaska was much warmer than it is now.

If you found two fossils in different layers of a soil bank, one at the top and one at the bottom, what could you determine? It would tell you that the fossils found on the bottom layer are older than the fossils on the top layer.

List the interior layers of the Earth. Mantel, outer core, inner core

What causes earthquakes? Earthquakes occur when two tectonic plates slip past each other.

What could cause a change in measurable snowfall or colder temperatures in the summer? Atmospheric dust from an eruption caused a decrease in the amount of solar energy that reaches the Earth.

What did Wegener hypothesize about fossils? At one time identical fossils located directly opposite each other on separated continents had to be connected.

What do fossils tell us about the Earth’s past? That the Earth has experienced change in both climate and surface features over time.

What does the movement of the tectonic plates cause? Changes in the shape of land surfaces

What happens when an oceanic plate converges with a continental plate? The more dense plate will sub duct under the other.

What happens/likely to occur when plates diverge? Mid-ocean ridges and rift valleys form

What is responsible for the lithosphere being able to move? The movement of hot materials in the mantle cause the lithosphere to move.

What layer of the Earth is the greatest in thickness? The mantle

What makes up the lithosphere? The upper mantle and crust

What was produced by an earthquake that caused a tsunami? It could produce a gigantic wave followed by a series of other large waves to appear along a coastline.

Why would it be possible to find a fossil on top of a mountain? The mountain was raised up after the fish died.