Rewis Chapter 3 Part 3

Front 1

A ___ is a slid substance found naturally in the earth's surface.

Back 1

mineral

Front 2

Concentrated areas of specific minerals are called ___.

Back 2

veins

Front 3

Veins of minerals are often found near ____ ____.

Back 3

volcanic areas

Front 4

____ is material with usable amounts of metal in them.

Back 4

ores

Front 5

______is the process of separating metal in the ore from the other materials.

Back 5

smelting

Front 6

Steps to smelting:
1)
2)
3)

Back 6

1)crush and heat the ore until it is liquid
2)the nonmetal part will float to the top of the liquid
3)the metal will sink to the bottom.

Front 7

________ is the nonmetal part of ore.

Back 7

dross

Front 8

Some metals are called ___ because of their rarity.

Back 8

precious

Front 9

___ is a soft and malleable (shapeable) metal often used in jewelry.

Back 9

gold

Front 10

______ is a metal often mixed with other metals and is used in photographic film processing.

Back 10

silver

Front 11

____ is an red-orange metal often used in wiring.

Back 11

copper

Front 12

____ is a very strong and durable metal used to make tools and buildings.

Back 12

iron

Front 13

_____ is a very practical metal that is strong and lightweight and is the most abundant metal in the earth's crust.

Back 13

alumium

Front 14

What is one way we can preserve the metals on earth?

Back 14

recycling the metals

Front 15

____ is a renewable resource that can be fertile if we take care of it.

Back 15

soil

Front 16

What are some ways we can converse our soil.
1)
2)
3)
4)

Back 16

1)fallowing
2)fertilize the soil
3)contour plowing
4)ground cover

Front 17

_____ means to let a field rest by not planting anything that year.

Back 17

fallowing

Front 18

_____ is the adding of organic material and minerals back into the soil

Back 18

fertilizing

Front 19

_____ is a low growing crop planted in a unused field to keep the topsoil from blowing away.

Back 19

ground cover

Front 20

__ ___ is the plowing of a hill around the hill instead of up and down the hill to slow the flow of water erosion.

Back 20

contour plowing

Front 21

___ of the Earth's surface is water.

Back 21

3/4

Front 22

All the Earth's water found in lakes, oceans, streams, rivers, soil and air are called the ___.

Back 22

hydrosphere

Front 23

The path of water from the air to the land and back is called the __ ___.

Back 23

water cycle

Front 24

___ contain most of the Earth's water.

Back 24

oceans

Front 25

_____ is the salt in the water.

Back 25

saline

Front 26

_____ is the process of removing the salt out of ocean water.

Back 26

desalination

Front 27

___ play a key role in the carbon dioxide -oxygen cycle of the Earth.

Back 27

ocean

Front 28

_____ a small plant in the ocean produce over 50% of the oxygen for the Earth.

Back 28

phytoplankton

Front 29

Name three ways the ocean helps us:
1 2 3

Back 29

1)provides water
2)provides oxygen
3)provides winds to keep temperatures mild

Front 30

The majority of liquid, fresh water is found _____.

Back 30

underground

Front 31

___ ____ is water that seeps into the ground from rain.

Back 31

ground water

Front 32

____ are layers of sand, gravel or bedrock that hold and move ground water.

Back 32

aquifer

Front 33

Water becomes a part of the atmosphere through _____

Back 33

evaporation

Front 34

_____ is the water vapor in the air.

Back 34

humidity

Front 35

___% of the fresh water is found in the Antarctica.

Back 35

70%

Front 36

___ ___ is a huge piece of ice on level ground.

Back 36

ice sheets

Front 37

The ice sheet covering the Antarctica is _____ deep.

Back 37

3 miles

Front 38

An ice sheet that moves over water is called a ___ __

Back 38

ice shelf

Front 39

The most famous ice shelf is the ___ ___ ___

Back 39

Ross Ice Shelf

Front 40

When ice shelves break off and float by themselves, it is called an ___.

Back 40

iceberg

Front 41

__ ____ is sea water that freezes.

Back 41

sea ice

Front 42

Ways we can conserve our resources:
1
2
3

Back 42

1)reduce the amount of resources we use
2)reuse material we have
3)recycle material