Question 1

Which of these is a good indicator of a chemical change?

Accepted Answer

All of the above

Answer

color change

Answer

Bubbling or effervescence

Answer

change in temperature

Question 2

Which of these indicates a physical change?

Accepted Answer

state or phase

Answer

gas forming

Answer

effervescence or bubbling

Answer

none of these

Question 3

What has a variable shape and a definite volume?

Accepted Answer

liquid

Answer

gas

Answer

solid

Answer

plasma

Question 4

Which of these is a chemical property?

Accepted Answer

reactivity and flammability

Answer

malleability

Answer

ductility

Answer

liquid to solid phase change

Question 5

Which of these is a mixture?

Accepted Answer

salad

Answer

table salt

Answer

water

Question 6

Which of these is a compound or new substance?

Accepted Answer

water

Answer

salad

Answer

hydrogen

Answer

carbon

Question 7

Which of these is a solution?

Accepted Answer

hot cocoa

Answer

water

Answer

carbon

Answer

oxygen

Question 8

What is the smallest unit of a compound?

Accepted Answer

molecule

Answer

solution

Answer

mixture

Answer

atom

Question 9

What type of property is density?

Accepted Answer

physical

Answer

D = m/v

Answer

chemical

Answer

phase

Question 10

What type of mixture is chocolate chip ice cream?

Accepted Answer

heterogeneous

Answer

homogeneous

Answer

saturated solution

Answer

ionic

Question 11

A compound can be defined as

Accepted Answer

substance composed of two or more elements chemically combined

Answer

substance composed of two or more elements physically combined

Answer

the smallest particle of an element

Answer

the same as mixtures

Question 12

The smallest particle of an element

Accepted Answer

atom

Answer

all of the above

Answer

molecule

Answer

mixture

Question 13

Which of the following is an example of a compound?

Accepted Answer

All of the above

Answer

NaCl--table salt

Answer

H20--water

Answer

CH4--methane

Question 14

In a mixture there is no chemical change because

Accepted Answer

the substances retain their separate identities or separate properties

Answer

the substances are both metals

Answer

none of the above

Answer

the substances bond and new material is formed

Question 15

What instrument do we use to calculate mass?

Accepted Answer

scale

Answer

meter stick

Answer

ruler

Answer

graduated cylinder

Question 16

Metals used to make wire have this physical property

Accepted Answer

ductility

Answer

none of the above

Answer

malleability

Answer

solubility

Question 17

Metals used to make electrical wiring have this physical property

Accepted Answer

conductivity

Answer

soluability

Answer

none of the above

Answer

malleability

Question 18

No definite shape and no definite volume describes...

Accepted Answer

gas

Answer

liquid

Answer

plasma

Answer

solid

Question 19

Cubic centimeters is a measure of...

Accepted Answer

volume

Answer

length

Answer

density

Answer

energy

Question 20

In order to find the density of irregularly shaped objects like jewelry, we would

Accepted Answer

use a graduated cylinder, water, and a scale

Answer

use a scale and a meter stick

Answer

use a graduated cylinder, water, scale and meter stick

Answer

all of these methods will give us the density

Question 21

Chemical or physical change? Boiling water

Accepted Answer

physical

Answer

chemical

Question 22

Chemical or physical change? Rusted tailpipe

Accepted Answer

chemical

Answer

physical

Question 23

Chemical or physical change? Bent fender

Accepted Answer

physical

Answer

chemical

Question 24

Chemical or physical change? Crushed can

Accepted Answer

physical

Answer

chemical

Question 25

Chemical or physical change? Melted can

Accepted Answer

physical

Answer

chemical

Question 26

Chemical or physical change? A baked chocolate cake

Accepted Answer

chemical

Answer

physical

Question 27

Chemical or physical change? Burning paper

Accepted Answer

Chemical

Answer

physical

Question 28

Chemical or physical change? Folding paper

Accepted Answer

physical

Answer

chemical

Question 29

The part of a solution that is mostly liquid and has something dissolved in it.

Accepted Answer

solvent

Answer

solute

Answer

substance

Answer

solution

Question 30

These are found in the nucleus of an atom and are positively charged.

Accepted Answer

proton

Answer

ion

Answer

electron

Answer

neutron

Question 31

Which state of matter has strong particle attraction?

Accepted Answer

solid

Answer

liquid

Answer

plasma

Answer

gas

Question 32

Which of the following is the best example of a pure substance?

Accepted Answer

gold

Answer

milk

Answer

peanuts

Answer

air

Question 33

Iron fillings are thrown into a pile of sand. What is the BEST way to separate this mixture?

Accepted Answer

Use a magnet to pick up the iron fillings.

Answer

Sift through the sand for all the iron.

Answer

Use a magnet to pick up the sand.

Question 34

Air is an example of a

Accepted Answer

mixture

Answer

compound

Answer

pure substance

Answer

solution

Question 35

Which is the best evidence for a chemical reaction?

Accepted Answer

color change

Answer

cutting metal

Answer

change of state

Answer

melting

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