Earth Science John

Question 1

Crust

Answer 1

Earth’s outermost and thinnest layer

Question 2

Mantle

Answer 2

layer that makes up most of Earth’s material.

Question 3

Core

Answer 3

Very center of the Earth and is made mostly of iron. Very hot.

Question 4

Seismograph

Answer 4

an instrument that calculates vibrations from an earthquake

Question 5

Continental Crust

Answer 5

makes up all the lands and is thickest in mountain areas.

Question 6

Oceanic crust

Answer 6

lies beneath the ocean floor. Made of a different kind of rock that is dark green or black.

Question 7

Lithosphere

Answer 7

top part of mantle and crust above it. Most of the lithosphere is under the ocens

Question 8

Inner core is

Answer 8

solid

Question 9

Outer core is

Answer 9

liquid

Question 10

How do scientists learn about the mantle and core?

Answer 10

They study materials pushed up through the crust, the measure vibrations from earthquakes and they perform experiments in labs.

Question 11

Faults

Answer 11

cracks in Earth’s crust where the surrounding rock has moved or shifted.

Question 12

Plates

Answer 12

A section of lithosphere. They are large and may include ocean and continent.

Question 13

Plate boundaries

Answer 13

The edges of the plates.

Question 14

Converging boundary

Answer 14

Two plates collide or hit each other

Question 15

Spreading plate boundary

Answer 15

Form when plates move apart from each other. One is under the Atlantic ocean.

Question 16

Sliding plate boundary

Answer 16

two plates move past each other in opposite directions. One is in California.

Question 17

Epicenter

Answer 17

The place on Earth’s surface above a focus.

Question 18

Focus

Answer 18

Place where a plate starts to slip.

Question 19

Tsunamis

Answer 19

Earthquakes under the ocean cause big waves called a tsunamis.