science - plate tectonics

Define strain. List and describe the 2 types of strain.

Answer explanation

Strain is the change in the shape of rock caused by stress.

Elastic strain- does NOT permanently change the shape of rock.

Plastic strain - does permanently change the shape of rock.

Complete the sentence using a word from the word bank: crust, mantle, lithosphere, asthenosphere, outer core, inner core, convection. The ____is a dense ball of solid iron crystals.

Tags

NGSS.MS-PS1-1

Complete the sentence using a word from the word bank: crust, mantle, lithosphere, asthenosphere, outer core, inner core, convection. The thick middle layer in the solid part of Earth is called the _______.

Complete the sentence using a word from the word bank: crust, mantle, lithosphere, asthenosphere, outer core, inner core, convection. The ______ is the brittle, rocky outer layer of Earth.

Complete the sentence using a word from the word bank: crust, mantle, lithosphere, asthenosphere, outer core, inner core, convection. The uppermost mantle and crust are grouped into a rigid layer known as the _______.

Complete the sentence using a word from the word bank: crust, mantle, lithosphere, asthenosphere, outer core, inner core, convection. The Earth's _______is a hot, liquid layer made of iron.

Complete the sentence using a word from the word bank: crust, mantle, lithosphere, asthenosphere, outer core, inner core, convection. The _____ is a plastic layer within the mantle.

What does the theory of plate tectonics state?

Answer explanation

Earth’s surface is made of rigid slabs of rock, or plates that move with respect to each other.

Tags

NGSS.MS-ESS2-3

What is responsible for plate motion? Describe HOW this phenomenon works. Answer in complete sentences.

Answer explanation

Plate motion is caused by CONVECTION CURRENTS in the asthenosphere.

These currents are created by hot, less dense mantle material that RISES toward the crust. It transfers thermal energy, cools and becomes more dense, and FALLS back toward the core. .

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-3

The 3 forces of plate motion are: basal drag, ridge push and slab pull. Describe each.

Answer explanation

Basal Drag - convection currents in the asthenosphere drag the lithosphere similar to a conveyor belt. (Think at grocery store…the belt with groceries keeps moving to the “bag” at the end.

Ridge Push - rising mantle material at mid-ocean RIDGE causes plates to move from one another (think “they move because of a PUSH”

Slab Pull - as a SLAB sinks into the mantle, it PULLS the rest of the plate down with it

Tags

NGSS.MS-ESS2-3