Earth Structure

Which layer of Earth contains convection currents?

• crust

• mantle

• outer core

• inner core

Scientists learned about the layers of Earth by studying:

• volcanoes

• earthquakes

• hurricanes

• Earth's rotation

Which layer of Earth is the hottest?

• crust

• mantle

• outer core

• inner core

The solid rock portion of Earth's surface is known as the:

• lithosphere

• hydrosphere

• atmosphere

All of the oceans, lakes, and rivers on Earth are part of the:

• lithosphere

• hydrosphere

• atmosphere

The atmosphere is made up of:

• gases in the air

• liquid water

• solid rock

Which of the following has a greater density?

• oceanic crust

• continental crust

Which of the following are dangers of a volcano? There may be more than one correct answer.

• lava that can destroy habitats and kill living things

• ash that can cover the surrounding area and be inhaled by animals

• a cloud of smoke that blocks out sunlight, which kills plant life

Which of the following are geologic events that can be caused by tectonic plate activity? Select all answers that are correct.

• hurricane

• tsunami

• earthquake

• volcano

• mountain

Earthquakes are more likely to happen:

• along tectonic plate boundaries

• in the middle of continents

• in the Southern Hemisphere

• where there are no faults in Earth's crust