Layers of the Earth

P-waves

• will NOT travel through liquids
• bend or refract as they travel through different densities
• are known as secondary waves

S-waves

• will NOT travel through liquids
• bend or refract as they travel through different densities
• are known as primary waves

What is the lithosphere composed of?

• crust and upper mantle
• core and upper mantle
• mantle
• oceanic and continental crust

Temperature __________ as you move towards the core

• stays the same
• increases
• decreases

Which layer is liquid iron and responsible for generating Earth's magnetic field?

• Crust
• Mantle
• Inner Core
• Outer Core

This layer is located under the lithosphere, contains convection currents, and it can flow like toothpaste.

• Lithosphere
• Asthenosphere
• Mesosphere

What is the most common rock type in the mantle?

• peridotite
• granite
• basalt
• quartzite

Geologist use seismic waves to help explain the structure of Earth. What type of waves do they analyze?

• P waves
• Surface waves
• S waves
• Both A and C

What evidence do scientist use to explain Earth's interior?

• Comets, Asteroids, Rocks
• Meteorites, Seismic Waves, Magnetic Field
• Meteorites, Asteroids, Dwarf Planets
• Meteorites, Meteoroids, Meteors

What is the composition of Earth's mantle?

• O, Si
• O, Si, Fe, Mg
• O, Si, Al, Ni
• Fe, Ni