Lapisan Bumi

What are the Earth's three main layers?

• core, mantle, surface

• inner core, outer core, mantle

• upper mantle, lower mantle, crust

• core, mantle, crust

What do earthquakes have in common with other waves?

• They bend when they travel through different materials

• They travel at the same speed as light waves

• They carry the same amount of energy as sound waves

• They have the same wavelength as radio waves

Where is Earth the thickest?

• water

• land

• at the poles

• at the equator

What word best characterizes the lower mantle?

• cool

• lukewarm

• molten

• scalding

How deep would you have to drill to reach the center of the Earth?

• about 60,000 kilometers

• about 6000 kilometers

• about 600 kilometers

• about 60 kilometers

What effect does spinning of the Earth's core have?

• It creates gravity

• It creates mass

• It creates the earth's magnetic field

• It creates matter

Which of the following statements about the Earth's inner core is true?

• Its made mostly of nickel

• Its made mostly of magnesium

• Its made mostly of cadmium

• Its made mostly of iron

What is the only entirely liquid layer of the Earth?

• the outer core

• the lower mantle

• the inner core

• the upper mantle

Which of the following statements is an opinion of the mantle?

• Its the most important layer

• Heat churns through it

• It contains iron, silicon, magnesium and oxygen

• It makes up a bulk of the Earth's mass

The inner core is solid

• nickel

• iron

• magnesium

• gold