Earth Layers and Rock Cycle

Earth is composed of three layers: the core, the mantle and the crust.  How are these three layers identified?

• By Their plate tectonics

• By their structural features

• By their physical properties

• By there chemical composition

What layer of the Earth has convection currents?

• Crust

• Lithosphere

• Core

• Mantle

The ​ ​ (a)   is the densest compositional layer and makes up one-third of Earth’s mass.

• core

• Crust

• Mesosphere

• Lithosphere

• Mantle

Which type of rock belongs in B?

• Igneous rock

• Sedimentary rock

• Metamorphic rock

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-1

Which statement best describes the Law of Superposition?

• Each sedimentary layer of rock represents 1,000 years of Earth’s age, much like the rings of a tree.

• In undisturbed layers of sedimentary rock, the upper rock layers are older than the lower rock layers.

• In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.

• Rocks that form near volcanoes are older than surrounding rock.

Tags

NGSS.MS-ESS1-4

Which layer of the Earth is composed mostly of molten rock and is located directly below the crust?

• Lithosphere

• Asthenosphere

• Mantle

• Outer Core

Which is a process that allows scientists to compare rock layers with others in a sequence to determine their age?

• radiometric dating

• absolute dating

• relative dating

Tags

NGSS.MS-ESS1-4

What are rocks that are brought to earth’s surface from the mantle called?

• obsidians

• felsoliths

• xenoliths

Tags

NGSS.MS-ESS2-1

What are rock strata?

• Rock strata are layers of volcanic ash that solidify quickly.

• Rock strata are layers of ice formed due to extreme cold temperatures.

• Rock strata are layers of metal deposits found deep underground.

• Rock strata are layers of rock that are formed over time due to sedimentation, compaction, and cementation.

Tags

NGSS.MS-ESS1-4

What are rocks that are brought to earth’s surface from the mantle called?

• obsidians

• felsoliths

• xenoliths

Tags

NGSS.MS-ESS2-1