4Th Grade Science Test

Front 1

The surface of the earth is always changing - True or False

Back 1

True

Front 2

Most changes on the surface of the earth happens (slowly or rapidly) ?

Back 2

Slowly

Front 3

True or False - Volcanoes and earthquakes can push land upward.

Back 3

True

Front 4

True or False - Weathering occurs when wind, water or plants breakdown or change rocks.

Back 4

True

Front 5

True or False - As plant roots grow, they can break rock

Back 5

True

Front 6

Many landforms are a result of upward forces and forces that ____ ____ the earth's surface.

Back 6

Push upward

Front 7

The process of breaking down and changing rocks is called_____.

Back 7

Weathering

Front 8

Decayed plant and animal material is called______

Back 8

Humus

Front 9

Soil is made of weathered rock, _____, air, and humus.

Back 9

water

Front 10

Name 4 things that make up soil.

Back 10

1.weathered rock
2. water
3. air
4. humus

Front 11

Name the 3 sizes of weathered rock found in soil.

Back 11

1. sand
2. silt
3. clay

Front 12

Shapes of land, such as mountains and canyons are called _______.

Back 12

Land forms

Front 13

______ is the layer in which most plants grow.

Back 13

Topsoil

Front 14

______ is the layer that is mostly coarse, weathered rocks without humus.

Back 14

Subsoil

Front 15

______ is the solid, unweathered rock under the layers of soil.

Back 15

Bedrock

Front 16

______ is the layer that contains humus.

Back 16

Topsoil

Front 17

______ is the force that wears away the earth's surface.

Back 17

Weathering

Front 18

______ ______ happens when water seeps into holes and cracks in rocks and then freezes and expands, breaking up the rocks.

Back 18

Frost Action

Front 19

_____ happens as water or wind gradually wears away rock by FRICTION.

Back 19

Abrasion

Front 20

______ is the loose material at the surface of the earth.

Back 20

Soil

Front 21

The movement of wearthered material from one place to another is called______.

Back 21

Erosion

Front 22

Water and wind can easily erode ______ _____ , the layer of soil needed for many plants to grow.

Back 22

Top Soil

Front 23

An area of sediment formed at the mouth of a river is called a ______.

Back 23

Sediment

Front 24

A huge river of ice moving slowly downhill is called a _______.

Back 24

Glacier

Front 25

______ occurs when wind, water, or ice drop weathered material in a new location

Back 25

Deposition

Front 26

A sudden downhill movement of soil and rocks is called a _____.

Back 26

Landslide

Front 27

A sudden downhill movement of snow and ice is called an_____.

Back 27

Avalanche

Front 28

Small bits of weathered rock and other material are called_____.

Back 28

Sediment

Front 29

_____ can cause canyons and gorges.

Back 29

Water erosion

Front 30

______ can cause hills called moraines.

Back 30

Glaciers

Front 31

____can cause hills called dunes.

Back 31

Wind erosion

Front 32

_____ can cause valleys where ponds and lakes form.

Back 32

Glaciers

Front 33

True or False - Erosion can be caused by water, wind or ice.

Back 33

True

Front 34

Deposited sediment makes the mouth of a river deeper or shallower?

Back 34

Shallower

Front 35

Erosion can happen slowly or quickly?

Back 35

Slowly

Front 36

Gravity causes water to flow uphill or downhill?

Back 36

Downhill

Front 37

Glaciers can pick up ____ and ___.

Back 37

Sediment and Rocks

Front 38

What force affects erosion?

Back 38

Gravity