Question 1

Water, gold, or another material that has a uniform composition can be classified as a(n) ....

Accepted Answer

pure substance

Answer

heterogeneous mixture

Answer

homogeneous mixture

Answer

colloid

Question 2

A material that does not have a uniform composition is a(n)...

Accepted Answer

mixture

Answer

pure substance

Answer

compound

Answer

element

Question 3

A material that is made up of more than one element in a uniform composition is a(n)...

Accepted Answer

compound

Answer

homogeneous mixture

Answer

heterogeneous mixture

Answer

element

Question 4

A material that is made up of only one type of atom is a(n)....

Accepted Answer

element

Answer

heterogeneous mixture

Answer

homogeneous mixture

Answer

compound

Question 5

An example of a homogeneous mixture is....

Accepted Answer

sugar dissolved in water

Answer

chicken noodle soup

Answer

salt and pepper

Answer

sand and gravel

Question 6

An example of a heterogeneous mixture is....

Accepted Answer

chicken noodle soup

Answer

tap water

Answer

distilled water

Answer

air

Question 7

An example of an element is...

Accepted Answer

carbon (C)

Answer

ethanol (CH3OH)

Answer

water (H2O)

Answer

methane (CH4)

Question 8

An example of a compound is...

Accepted Answer

water (H2O)

Answer

fluorine (F)

Answer

oxygen (O)

Answer

carbon (C)

Question 9

In a physical change....

Accepted Answer

a material changes form, but its chemical formula does not change

Answer

a material burns

Answer

a material changes into a new chemical

Answer

a material participates in a chemical reaction

Question 10

In a chemical change....

Accepted Answer

a material changes into a new chemical

Answer

two materials are stuck together

Answer

a material changes form, but its chemical formula does not change

Answer

a material breaks into smaller pieces

Question 11

Which is a chemical change?

Accepted Answer

burning paper

Answer

crumpling paper

Answer

gluing paper to another paper

Answer

tearing paper

Question 12

Which is a physical change?

Accepted Answer

boiling water (water liquid turning to water gas)

Answer

turning water into hydrogen and oxygen

Answer

iron rusting to make iron oxide

Question 13

Using a funnel and filter paper to separate a solid from a solution is...

Accepted Answer

filtration

Answer

evaporation

Answer

distillation

Answer

dessication

Question 14

What method could you use to separate salt from salt water?

Accepted Answer

evaporation

Answer

a sieve

Answer

filtration

Answer

dessication

Question 15

If you want to separate salt from salt water, can you collect both the salt and the water?

Accepted Answer

yes- but only if you use distillation

Answer

yes- if you evaporate the water

Answer

no

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