Earth layers

Why did scientists reject Wegener's continental drift hypothesis? A. He could not explain how the continents moved. B. The climates of the continents have remained the same. C. Fossil evidence showed the continents were never joined. D. The geology of the continents didn't support his hypothesis.

A. He could not explain how the continents moved.

The Crust of the Earth is often referred to as the A. Lithosphere B. Asthenosphere C. Mantle D. Core

A. Lithosphere

How do Earth's crust and mantle differ? A. The crust is much thinner and less dense than the mantle. B. The crust is much thinner and denser than the mantle. C. The mantle is much thicker and less dense than the crust. D. The mantle is much thinner and denser than the crust.

A. The crust is much thinner and less dense than the mantle.

Workers break up and remove rock as they build a road. They are making a small change to Earth's A. crust. B. outer core. C. mantle. D. inner core.

A. crust

The layer that makes up the greatest amount of the Earth's mass is the A. inner core. B. crust. C. mantle. D. outer core.

A. inner core.

Which of the following is also known as a spreading center?A. Transform boundary B. Divergent boundary C. Convergent boundary D. Convection boundary

B. Divergent boundary

Why do most earthquakes occur at tectonic plate boundaries? A. There is little or no movement of rock in these areas. B. Large amounts of stress build up as plates move. C. Very little stress builds up along tectonic plate boundaries. D. Most faults occur in the middle of the tectonic plates.

B. Large amounts of stress build up as plates move.

A tectonic plate is a slab of Earth's A. crust and lower mantle. B. crust and uppermost mantle. C. uppermost mantle and core. D. lower mantle and core.

B. crust and uppermost mantle.

Scientists believe that the outer core is A. rocky. B. solid. C. liquid. D. frozen.

B. solid.

Why is the inner core of the earth solid? A. The temperature of the core is not hot enough to melt. B. The core is made of iron and nickel. C. The inner core has an enormous amount of pressure on it. D. The inner core is a rock.

C. The inner core has an enormous amount of pressure on it.

Tectonic plates that slide above or below each other are known as a A. transform boundary. B. divergent boundary. C. convergent boundary. D. convection boundary.

C. convergent boundary.

At transform boundaries, two plates A. pull away from each other. B. push against each other. C. scrape past each other. D. do not move in any direction.

C. scrape past each other.

What are Earth's layers from the center to the surface? A. inner core, outer core, crust, mantle B. crust, mantle, outer core, inner core C. crust, outer core, mantle, inner core D. inner core, outer core, mantle, crust

D. inner core, outer core, mantle, crust