Science unit 8

Question 1

Weathering

Answer 1

The breaking down of rocks on Earth surface into smaller pieces

Question 2

Erosion

Answer 2

The process of moving sediment from one place to another

Question 3

Deposition

Answer 3

The dropping or settling of eroded materials

Question 4

Sediment

Answer 4

Sand, bits, or settling of eroded materials

Question 5

Delta

Answer 5

Landform created by the long-term depostion of sediment

Question 6

Landform

Answer 6

A natural land shape or feature

Question 7

Sand dune

Answer 7

a mound or ridge of sand or other loose sediment formed by wind

Question 8

Causes of Weathering

Answer 8

Gravity, Flowing water, rain, floods, waves, tree roots, chemicals in rain (pollution), sand blowing, animals digging, and ice wedging

Question 9

crust

Answer 9

the thin outer layer of Earth, including dry land and the ocean floor

Question 10

mantle

Answer 10

the think layer of earth beneath the crust

Question 11

core

Answer 11

the layer of earth extending from earth’s center to the bottom of the mantle. Its mostly metallic iron and nickel

Question 12

Plate tectonics

Answer 12

the theory that Earth’s crust is divided into plates that are always moving

Question 13

fault

Answer 13

a break in earth’s crust where rock on one side moves in redation to rock on the side

Question 14

earthquake

Answer 14

a shaking of Earth’s surface that can cause land to rise and fall

Question 15

epicenter

Answer 15

the point on earth’s sorface directly above the focus of an earthquake

Question 16

volcano

Answer 16

a place where hot gases, smoke, and melted rock come out of the ground onto earth’s surface