Unit Two Retest

Question 0

The physical properties of compounds do NOT include…

Answer 0

Reaction to light

Question 1

If a spoonful of salt is mixed in a glass of water, what is the water called?

Answer 1

Solute

Question 2

During which change is state so atoms or molecules become more ordered?

Answer 2

Condensation

Question 3

Which of the following is not a reason that compounds are considered pure substances

Answer 3

They can be separated by physical methods

Question 4

Which if the following is considered a mixture??

Answer 4

Natural gas

Question 5

The flammability of a substance is…

Answer 5

A chemical propriety

Question 6

In which classification of matter are components chemically combined?

Answer 6

Compound

Question 7

Two identical ships are in port. Ship a is sitting lower in the water that ship b. ship a has not been unloaded, but ship b has been unloaded. Why does ship a sit lower in the water?

Answer 7

Ship a has more volume

Question 8

A liter of gasoline will boil at…

Answer 8

The same temperature as a milliliter of gasoline.

Question 9

How does a physical change differ from a chemical change?

Answer 9

A physical change is reversible

Question 10

Which of the following is not the result of a chemical change?

Answer 10

Soured milk

Question 11

How is a compound different from a mixture?

Answer 11

Each substance in a compound loses it’s characteristic properties

Question 12

Higher temperatures…

Answer 12

Particles in an object move faster

Question 13

Which of the following best describes chicken noodle soup

Answer 13

Mixture

Question 14

Rusting is an example of?

Answer 14

Chemical change

Question 15

Which of the following is a chemical property of matter?

Answer 15

Solubility

Question 16

In order for carbon dioxide gas into the enter from dry ice ice must…

Answer 16

Gain energy

Question 17

Which of the following events is not a common sign that a chemical change has taken place?

Answer 17

Change in state

Question 18

What is a pure substance that is made up of two or more elements that are chemically combined called?

Answer 18

Compound

Question 19

Melton a crayon is an example of?

Answer 19

Physical change

Question 20

Which of the following statements describes a chemical change?

Answer 20

A gas is given off when a liquid freezes

Question 21

What kind of changes

Substances are always physical changes?

Answer 21

Changes do state from solid to liquid to has and back

Question 22

Dew collecting on a spider web in the early morning is an example of…

Answer 22

Condensation

Question 23

What is the force that holds atoms together called?

Answer 23

Chemical bond

Question 24

Which if the following is NOT an example of a physical change?

Answer 24

The explosion of fireworks

Question 25

Which one is NOT an example of chemical reaction

Answer 25

Ice melting

Question 26

Which of the following statements does NOT describe a physical property of a piece of chalk?

Answer 26

Chalk will bubble in vinegar

Question 27

What is the best way to tell of a chemical change has taken place?

Answer 27

The matter changes color

Question 28

Most of the earths atmosphere is composed of

Answer 28

Nitrogen

Question 29

Which of the following statements best describes the particles of a liquid

Answer 29

The particles are close together but moving past each other

Question 30

Boiling points in freezing point for examples of?

Answer 30

Physical properties

Question 31

In a solid the particles...

Answer 31

Vibrate in place

Question 32

Which of the following occurs when a liquid becomes a gas?

Answer 32

The particles break away from eachother

Question 33

A gas...

Answer 33

Has fast moving particles

Question 34

What occurs when water freezes?

Answer 34

Physical change

Question 35

The melting point of salt is the same as it's?

Answer 35

Freezing point

Question 36

The reverse of condensation is?

Answer 36

Evaporation

Question 37

When elements form mixtures, the elements

Answer 37

Keep their original properties

Question 38

Which is fine is not a sign of chemical reaction

Answer 38

Energy change

Question 39

The change from a solid directly to a gas is called?

Answer 39

Sublimation

Question 40

Which of the following sentences describes elements?

Answer 40

Elements have unique sets of properties

Question 41

How do the particles of water that evaporate from an open container differ from the particles that mean

Answer 41

The evaporated particles have more speed and higher energy

Question 42

Which of the following statements is not true of atoms and molecules

Answer 42

They never bump into each other

Question 43

What is the second most abundant had in the earths atmosphere?

Answer 43

Oxygen

Question 44

Souring milk is an example of?

Answer 44

Chemical change

Question 45

When two or more elements join together chemically...

Answer 45

A compound is formed