Earth Science

The crust of the Earth is covered by about ________ water in the hydrosphere.

• 50%

• 60%

• 70%

• 80%

Tags

NGSS.MS-ESS2-4

Which of the following layers of the Earth is unique among the terrestrial planets?

• core

• crust

• mantle

• hydrosphere

If we know that the Earth's average density is more dense than the rock in the crust, what can we assume about the Earth's interior?

• that Earth's least dense material must be beneath the surface

• that Earth's most dense material must be the seafloor and the continents

• that Earth's most dense material must be beneath the surface

• that Earth's most dense material must be water

Tags

NGSS.MS-ESS3-1

From the center outward, the correct order of the Earth's layers is:

• solid rock core, liquid metal mantle, solid rock crust.

• liquid iron inner core, solid nickel outer core, rocky mantle, silicate crust.

• solid metallic inner core, molten metal outer core, silicate mantle and crust.

• molten metal hydrosphere, molten rock lithosphere, solid silicate crust.

From the Earth's center outward, the correct order of layers is:

• core, magnetosphere, mantle, crust, hydrosphere, atmosphere.

• core, crust, mantle, hydrosphere, atmosphere, magnetosphere.

• core, mantle, crust, hydrosphere, atmosphere, magnetosphere.

• core, hydrosphere, mantle, crust, atmosphere, magnetosphere.

What gas is the primary constituent of our atmosphere?

• hydrogen

• carbon dioxide

• nitrogen

• oxygen

The critical part of the atmosphere for protecting life on the ground from excessive ultraviolet radiation is the:

• troposphere

• ozone layer

• stratosphere

• ionosphere

What layer of the atmosphere do we live in?

• troposphere

• mesosphere

• stratosphere

• ionosphere

Above about 100 km, the high-energy portion of the Sun's radiation spectrum breaks down molecules into ionized atoms. What is this part of Earth's atmosphere called?

• the stratosphere

• the mesosphere

• the troposphere

• the ionosphere

What is the main anthropogenic (human-caused) source of the "hole" in the ozone layer?

• carbon dioxide

• CFCs

• water vapor

• giant laser beams (pew-pew!)

Tags

NGSS.MS-ESS3-4