FOSS Earth History Investigations 5 & 6 Review

Front

What is pumice?

Back

Pumice is a type of volcanic rock that forms when lava cools quickly and traps gas bubbles, giving it a light, porous texture.

Front

What causes bubbles to form in pumice?

Back

The bubbles in pumice are caused by the release of dissolved gases found in lava during the cooling process.

Front

What is the asthenosphere?

Back

The asthenosphere is a heated, semisolid layer of the Earth's mantle that flows due to convection currents.

Front

What is the lithosphere?

Back

The lithosphere is the rigid outer layer of the Earth, consisting of the crust and the uppermost part of the mantle.

Front

What are tectonic plates?

Back

Tectonic plates are large sections of the Earth's lithosphere that move and interact with each other, causing geological activity such as earthquakes.

Front

Why does California experience constant earthquake tremors?

Back

California experiences constant earthquake tremors because it lies near the sliding edges of tectonic plates.

Front

True or False: Earthquakes occur every day but may not be felt by people.

Back

True.

Front

True or False: Earth's plates are in slow constant motion.

Back

True.

Front

What is the difference between the inner core and outer core of the Earth?

Back

The inner core is solid and composed mainly of iron and nickel, while the outer core is liquid and also made of iron and nickel.

Front

What is convection current?

Back

Convection currents are movements within a fluid (like the mantle) caused by the heat from below, which creates a cycle of rising and sinking material.