6th Grade Science Unit 4: Lithosphere Review

What are the contents of Earth's outer layer?

• a.) gases and water

• b.) the mantle and landmassess

• c.) the atmosphere and the oceans

• d.) continental crust and oceanic crust

What evidence provides the most information to geologists concerning the structure of the Earth's interior?

• fossil remains found in caves

• observations of other planets

• rock samples and seismic waves

• temperature measurements in deep mines

Which explanation provides the best scientific reason for the ordered arrangement of Earth’s layers?

• The densest elements sink toward the center of Earth, while the least dense elements rise toward the surface of Earth.

• Iron is magnetic, so the iron in the core binds together and is unable to move to other layers of Earth.

• The core is the oldest material on Earth, and newer material is always found on top of older material.

• Some layers of Earth are solid, while others are liquid; therefore, they do not mix or move easily.

What is the effect of Earth’s core?

• creation of volcanic lava

• creation of a magnetic field

• production of liquids beneath the surface

• production of oxygen and rock to form the mantle

What are the pieces of the lithosphere called that move around on top of the asthenosphere?

• tectonic plates

• mesosphere

• continents

• crust

What causes the movement of the mantle inside Earth?

• convection currents

• magnetic fields

• Coriolis effect

• jet stream

Scientists analyzed a layer of Earth and determined it was solid, magnetic, and very hot. Which layer of Earth did the scientists MOST LIKELY analyze?

• the crust

• the mantle

• the outer core

• the inner core

Which BEST supports the choice from Part A?

• A. The crust is closest to the surface, which means it is the hottest.

• B. The mantle contains minerals, which means it is solid.

• C. The outer core is liquid metal, which means it is very hot.

• D. The inner core is solid metal, which means it has magnetic properties.

Which occurs as one goes deeper into Earth’s interior?

• Density, temperature, and pressure increase.

• Density, temperature, and pressure decrease.

• Density decreases and temperature and pressure increase.

• Density and temperature decrease and pressure increases.

Which of the following has the greatest direct influence on movement of the lithosphere?

• the Sun

• the Moon

• Earth’s core

• Earth’s mantle