6.E.2 NCFE Review: Structure of Earth

What process is responsible for the Atlantic Ocean becoming wider by a few centimeters each year?

• one plate moving under the other plate

• two plates meeting at a transform boundary

• seafloor spreading along the Mid-Atlantic Ridge

• the edges of the continents are subsiding

Which choice describes Earth’s crust?

• a thick layer of rock floating on liquid metal

• a group of continents floating on a large ocean

• a warm layer of rock floating on a cold layer of rock

• a thin layer of rock floating on a solid but fluid-like layer

Which most likely causes seafloor spreading?

• earthquakes

• divergent boundaries

• convergent boundaries

• transform fault boundaries

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Which type of environment would contain nutrient-rich soil?

• an environment with a low population of producers

• an environment with a wet climate and many plants

• an environment with a high population of consumers

• an environment with a dry climate and few plants

Tags

NGSS.MS-LS1-5

Which best describes the density of Earth’s layers?

• The crust is the most dense because it is the top layer.

• The mantle is the most dense because it is the thickest layer.

• The outer core is the most dense because it is the only liquid layer.

• The inner core is the most dense because it is under the most pressure.

Which best describes Earth’s crust?

• It is the thickest layer of Earth.

• It is composed of several continental plates.

• It contains layers of stationary rock.

• It is more dense than the other layers of Earth.

Tags

NGSS.MS-ESS2-3

Which statement best explains the role of environmental conditions in the formation of soil?

• Areas near fresh or salt water produce wet, sandy soil.

• Areas with high temperatures produce soil at a faster rate.

• The rocks and climate of an area determine the type of soil.

• The number of organisms living in the soil determine its type.

Tags

NGSS.MS-LS1-5

At the mid-ocean ridge, new oceanic crust is continually being produced. How does Earth’s size change as the new crust is produced?

• Earth’s size is growing larger because new crust is being added next to old crust.

• Earth’s size is growing smaller because the new crust pushes the continents closer together.

• Earth’s size is unchanged because as new crust is produced, earthquakes occur breaking up the old crust.

• Earth’s size is unchanged because as new crust is produced, old crust is forced down to the mantle where it melts.

Tags

NGSS.MS-ESS2-2

Which best compares Earth’s crust and mantle?

• The crust is thicker and less dense than the mantle.

• The crust is thinner and less dense than the mantle.

• The crust is thicker and more dense than the mantle.

• The crust is thinner and more dense than the mantle.

This map shows the boundaries of Earth’s major tectonic plates. Which numbered area on the map represents the African Plate?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-ESS2-3