Dws Unit E Chapter 1

Front 1

_____ is anything that has mass and takes up space.

Back 1

matter

Front 2

______ is a set of characteristics an object displays.

Back 2

properties

Front 3

Give examples of physical properties: 1 2 3

Back 3

1.color 2. taste 3. hardness

Front 4

__ ___ are characteristics of a substance that can be observed or measured.

Back 4

Physical properties

Front 5

____,_____, and _____ are all examples of measurements.

Back 5

Length, width and weight

Front 6

____ is the amount of matter in an object.

Back 6

Mass

Front 7

_____ is a measure of the pull of gravity on an object.

Back 7

Weight

Front 8

(True/False)The mass of an object will always be the same.

Back 8

True

Front 9

(True/False) The weight of an object will always be the same.

Back 9

False

Front 10

Your weight on the moon would be _____ of what is it on Earth.

Back 10

1/6

Front 11

What measure is best in determining the amount of matter an object has?

Back 11

mass

Front 12

What instrument do we use to measure mass?

Back 12

a balance

Front 13

What instrument do we use to measure weight?

Back 13

spring scale

Front 14

How are mass and weight the same?

Back 14

They both measure the matter of an object.

Front 15

____ is the amount of space that an object takes up.

Back 15

volume

Front 16

The volume of a liquid can be measured using a ___ ___.

Back 16

graduated cylinder

Front 17

Name two ways volume can be calculated:
1
2

Back 17

1)using the formula LxWxH
2)liquid displacement

Front 18

____ is the concentration of matter in an object.

Back 18

density

Front 19

What is the formula for density?

Back 19

Density - mass/volume

Front 20

True/False. Pure substances always have the same density when measured under the same conditions.

Back 20

True

Front 21

Why is density used to identify pure substances?

Back 21

Because pure substances always have the same density.

Front 22

If you have a substance with a mass of 76.5 grams and a volume of 15cm, what will the density of the substance be?

Back 22

5.1 g/cm

Front 23

A ____ is a combination of two or more different kinds of matter, each of which keeps it own physical properties.

Back 23

mixture

Front 24

Give an example of a mixture.

Back 24

sugar and iron fillings

Front 25

A _____ is a type of mixture in which particles of the two substances are evenly mixed.

Back 25

solution

Front 26

The ______ of substances is their ability to be dissolved.

Back 26

solubility

Front 27

______ is a solution of zinc and copper. (solid mixture)

Back 27

Brass

Front 28

___ is an example of a mixture of gases.

Back 28

air

Front 29

What state of matter has a definite shape and volume?

Back 29

solid

Front 30

What state of matter has a definite volume, but not a definite shape?

Back 30

liquid

Front 31

What state of matter does not have a definite volume or shape?

Back 31

gas

Front 32

What are the three states of matter?

Back 32

solid, liquid and gas

Front 33

Molecules in a _______ do not move, but rather, vibrate.

Back 33

solid

Front 34

Molecules in a _____move slowly.

Back 34

liquid

Front 35

Molecules in a ____ move the fastest.

Back 35

gas

Front 36

A ____ has the greatest density, a _____ has the least amount of density.

Back 36

solid

gas

Front 37

If the molecules in a gas are placed under pressure, the molecules will begin to stay closer together. If the pressure is great enough, the gas will turn into a ___.

Back 37

liquid

Front 38

Explain how evaporation works with the states of matter.

Back 38

When heat is added to a liquid, the molecules of the liquid begin to move faster and further apart, cause the liquid to turn to a gas.

Front 39

_____ is a change in state from a solid to a liquid.

Back 39

melting

Front 40

____ changes a substance from a liquid to a gas.

Back 40

boiling

Front 41

_____ changes a substance from a liquid to a solid.

Back 41

freezing

Front 42

________ occurs when particles escape from a nonboiling liquid and become a gas.

Back 42

evaporation

Front 43

______ changes a substance from a gas to a liquid.

Back 43

condensation

Front 44

______ is a change in state from a solid to a gas.

Back 44

sublimation

Front 45

True/False.
Changes in state do not change a substance.

Back 45

True

Front 46

Changes in state occur when ____ is added or removed.

Back 46

heat

Front 47

When heat is added to a substance, the particles ___ energy.

Back 47

gain

Front 48

When heat is removed from a substance, the particles __ energy.

Back 48

lose

Front 49

Changes in which no new substances are formed are __ ___.

Back 49

physical changes

Front 50

Changes in which one or more new substances are formed are called ___ ____.

Back 50

chemical changes

Front 51

_____ is one kind of chemical reaction.

Back 51

Burning

Front 52

The starting substances of a chemical reaction are called ____.

Back 52

reactants

Front 53

The new substance formed in a chemical reaction is called the ____.

Back 53

product

Front 54

_____,______, ______ or (sometimes)_______ are all clues that a chemical reaction has taken place.

Back 54

Light, heat, gas or (sometimes) color

Front 55

Sodium combines with ____ to form salt.

Back 55

chlorine

Front 56

What is the difference between physical change and chemical reaction?

Back 56

A physical change does not produce a new substance, and a chemical reaction does.

Front 57

_______ cannot always be used to identify a chemical reaction.

Back 57

color

Front 58

____ is the ability to burn.

Back 58

Combustibility

Front 59

_____ tests are often used to identify substances.

Back 59

Flame

Front 60

________ are dyes that react chemically with acids and bases.

Back 60

Indicators

Front 61

What type of chemical and physical properties can help predict the nature of a substance?
1
2
3

Back 61

1)combustibility
2)pH indicators
3)separation of mixtures

Front 62

An ___ is a combination of a metal and other substances.

Back 62

ore

Front 63

The process of _______ recovers vapors and condense them into a liquid.

Back 63

distillation

Front 64

Name three ways mixtures can be separated:
1
2
3

Back 64

1)water or magnet
2)spinning at high speeds
3)boiling

Front 65

What is the Law of Conservation?

Back 65

Matter is neither created nor destroyed during a physical change or chemical reaction.

Front 66

____ ____, a French scientist, was among the first scientists to carefully measure chemical reactions.

Back 66

Antoine Lavoisier