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Unit 2 Review

Total questions: 79

Worksheet time: 44mins

Name
Class
Date
1.

Which of the following is the correct units for density?

a)

grams (g)

b)

Newtons (N)

c)

cm3

d)

g/cm3

2.

What is the density of an object if it has a mass of 6g and a volume of 3cm3? (Hint: Density = mass/volume)

a)

6 g/cm3

b)

3 g/cm3

c)

2 g/cm3

d)

1/3 g/cm3

3.

You calculated the density of an unknown substance to be 7.8g/cm3. According to the chart, which of the substances doe you most likely have?

a)

Zinc

b)

Copper

c)

Tin

d)

Iron

4.

What is the density of an object with a mass of 3g and a volume of 1cm3? (Hint: Density = mass / volume)

a)

1/3 g/cm3

b)

3 g/cm

c)

3 g/cm3

5.

You calculated the density of an unknown substance to be 5.7g/cm3. According to the chart, which of the substances do you most likely have?

a)

Aluminum

b)

Iron

c)

Tin

d)

Zinc

6.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
7.
Why do some substances float on water?
a)
they are warmer than water
b)
they are cooler than water
c)
they are more dense than water
d)
they are less dense than water
8.

Which is an example of a heterogeneous mixture?

a)

sugar water

b)

brass

c)

table salt

d)

salad

9.

A pure substance that cannot be broken down into any other substances

a)

atom

b)

element

c)

compound

d)

mixture

10.

Smallest and basic particle of a pure substance

a)

element

b)

atom

c)

compound

d)

mixture

11.

A pure substance made of two or more elements chemically combined in a set ratio

a)

element

b)

atom

c)

compound

d)

mixture

12.

A combination of two or more substances that are not chemically combined

a)

element

b)

atom

c)

compound

d)

mixture

13.

A mixture in which different materials can be easily distinguished

a)

heterogeneous mixture

b)

homogeneous mixture

c)

chemical formula

d)

molecule

14.

Shows the elements in the compound and the ratio of atoms

a)

heterogenous mixture

b)

homogenous mixture

c)

chemical formula

d)

molecule

15.

A group of atoms bonded together

a)

chemical formula

b)

chemical bond

c)

molecule

d)

solution

16.

A mixture that forms when one substance dissolves another

a)

molecule

b)

solution

c)

pure substance

d)

compound

17.

Matter that always has exactly the same composition

a)

molecule

b)

solution

c)

pure substance

d)

Chemistry

18.

The study of the properties of matter and how matter changes

a)

Changeology

b)

Chemistry

c)

Mastery

d)

Biology

19.

What is CO2 an example of?

a)

Element

b)

Compound

c)

Atom

d)

Mixture

20.

Lemonade consists of several substances that are NOT chemically combined, so lemonade is classified as

a)

pure substance

b)

a compound

c)

a mixture

d)

an element

21.

What are examples of chemical formulas?

a)

H2O

b)

C12H22O11

c)

Salad

d)

Milk

e)

Lemonade

22.

CO2, NaCl, and HCl may all be classified as

a)

compounds and pure substances.

b)

elements and pure substances.

c)

elements and molecules.

d)

elements and compounds.

23.

The chemical formula of glucose is C6H12O6, so it is classified as a(n)

a)

element.

b)

mixture.

c)

solution.

d)

pure substance.

24.

One difference between mixtures and pure substances is that

a)

mixtures can be physically separated.

b)

mixtures are made of one type of atom.

c)

pure substances have no chemical bonds.

d)

pure substances can be physically separated.

25.

Suppose you have a container filled with iron and sand. You can separate the iron from the sand if you ____________ so this is a _________.

a)

use a magnet; mixture

b)

melt the sand; mixture

c)

add baking soda; chemical compound

d)

dissolve the sand in water; solution

26.

In the classification of matter, how would we classify air?

a)

pure mixture

b)

pure substance

c)

homogeneous mixture

d)

heterogeneous mixture

27.

The table lists the chemical formulas or symbols of a few common substances. Which two substances are compounds?

a)

aluminum and iron

b)

iron and sodium chloride

c)

carbon dioxide and aluminum

d)

sodium chloride and carbon dioxide

28.

Ms. Roberts asked Tim to put the label "compound" on the correct jar in the picture. Which of the four substances is a compound?

a)

chlorine

b)

nitrogen

c)

sodium

d)

water

29.

Water, H2O, is made up of different elements, hydrogen and oxygen. Is this type of combination a mixture or a pure substance?

a)

Because water is composed of two separate elements, it is a mixture.

b)

Because water can be heated and fairly easily turned to steam, it is a mixture.

c)

Because water is composed of elements found in the periodic table, it is a pure substance.

d)

Because water molecules all have a consistent ratio of hydrogen to oxygen, it is a pure substance.

30.

What is a force of attraction between two atoms?

a)

mixture

b)

compound

c)

chemical bonding

d)

chemical property

31.

Which is an example of a heterogeneous mixture?

a)

sugar water

b)

brass

c)

table salt

d)

salad

32.

A pure substance that cannot be broken down into any other substances

a)

atom

b)

element

c)

compound

d)

mixture

33.

Smallest and basic particle of a pure substance

a)

element

b)

atom

c)

compound

d)

mixture

34.

A pure substance made of two or more elements chemically combined in a set ratio

a)

element

b)

atom

c)

compound

d)

mixture

35.

A combination of two or more substances that are not chemically combined

a)

element

b)

atom

c)

compound

d)

mixture

36.

A mixture in which different materials can be easily distinguished

a)

heterogeneous mixture

b)

homogeneous mixture

c)

chemical formula

d)

molecule

37.

Shows the elements in the compound and the ratio of atoms

a)

heterogenous mixture

b)

homogenous mixture

c)

chemical formula

d)

molecule

38.

A group of atoms bonded together

a)

chemical formula

b)

chemical bond

c)

molecule

d)

solution

39.

A mixture that forms when one substance dissolves another

a)

molecule

b)

solution

c)

pure substance

d)

compound

40.

Matter that always has exactly the same composition

a)

molecule

b)

solution

c)

pure substance

d)

Chemistry

41.

The study of the properties of matter and how matter changes

a)

Changeology

b)

Chemistry

c)

Mastery

d)

Biology

42.

What is CO2 an example of?

a)

Element

b)

Compound

c)

Atom

d)

Mixture

43.

Lemonade consists of several substances that are NOT chemically combined, so lemonade is classified as

a)

pure substance

b)

a compound

c)

a mixture

d)

an element

44.

What are examples of chemical formulas?

a)

H2O

b)

C12H22O11

c)

Salad

d)

Milk

e)

Lemonade

45.

CO2, NaCl, and HCl may all be classified as

a)

compounds and pure substances.

b)

elements and pure substances.

c)

elements and molecules.

d)

elements and compounds.

46.

The chemical formula of glucose is C6H12O6, so it is classified as a(n)

a)

element.

b)

mixture.

c)

solution.

d)

pure substance.

47.

One difference between mixtures and pure substances is that

a)

mixtures can be physically separated.

b)

mixtures are made of one type of atom.

c)

pure substances have no chemical bonds.

d)

pure substances can be physically separated.

48.

Suppose you have a container filled with iron and sand. You can separate the iron from the sand if you ____________ so this is a _________.

a)

use a magnet; mixture

b)

melt the sand; mixture

c)

add baking soda; chemical compound

d)

dissolve the sand in water; solution

49.

In the classification of matter, how would we classify air?

a)

pure mixture

b)

pure substance

c)

homogeneous mixture

d)

heterogeneous mixture

50.

The table lists the chemical formulas or symbols of a few common substances. Which two substances are compounds?

a)

aluminum and iron

b)

iron and sodium chloride

c)

carbon dioxide and aluminum

d)

sodium chloride and carbon dioxide

51.

Ms. Roberts asked Tim to put the label "compound" on the correct jar in the picture. Which of the four substances is a compound?

a)

chlorine

b)

nitrogen

c)

sodium

d)

water

52.

Water, H2O, is made up of different elements, hydrogen and oxygen. Is this type of combination a mixture or a pure substance?

a)

Because water is composed of two separate elements, it is a mixture.

b)

Because water can be heated and fairly easily turned to steam, it is a mixture.

c)

Because water is composed of elements found in the periodic table, it is a pure substance.

d)

Because water molecules all have a consistent ratio of hydrogen to oxygen, it is a pure substance.

53.

What is a force of attraction between two atoms?

a)

mixture

b)

compound

c)

chemical bonding

d)

chemical property

54.
Physical or Chemical change?
rain evaporates on the sidewalk
a)
Physical 
b)
Chemical
55.
Physical or Chemical change?
electricity separates water into Hydrogen and Oxygen
a)
Physical 
b)
Chemical
56.
Physical or Chemical change?
recycling used aluminum cans to make new aluminum cans
a)
Physical 
b)
Chemical
57.
Physical or Chemical change?
glucose dissolves in water
a)
Physical 
b)
Chemical
58.
Physical or Chemical change?
aluminum combining with oxygen to from aluminum oxide
a)
Physical 
b)
Chemical
59.
Physical or Chemical change?
a nail rusting
a)
Physical 
b)
Chemical
60.

What is the change of state from a liquid to a gas called?

a)

Vaporization

b)

Freezing

c)

Sublimation

d)

Deposition

61.

What is the change of state from a gas to a liquid called?

a)

Deposition

b)

Condensation

c)

Melting

d)

Evaporation

62.

What is the change of state of a solid directly to a gas called?

a)

Vaporization

b)

Sublimation

c)

Freezing

d)

Condensation

63.

What is the change of state from a liquid to a solid called?

a)

Freezing

b)

Boiling

c)

Melting

d)

Vaporization

64.

Which phase has the lowest kinetic energy?

a)

Solid

b)

Liquid

c)

Gas

65.

Which phase has a fixed volume and a fixed shape?

a)

Solid

b)

Liquid

c)

Gas

66.

Which phase does NOT have a fixed volume or shape

a)

Soild

b)

Liquid

c)

Gas

67.

What state of matter does this picture represent?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

68.

Which state of matter does this picture represent?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

69.

What state of matter does this picture represent?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

70.

Which phase change is happening in this picture?

a)

Boiling

b)

Sublimation

c)

Freezing

d)

Melting

71.

When a solid is melting the particles are... Pick all that apply

a)

Getting closer together

b)

 Getting farther apart

c)

Moving faster

d)

Moving slower 

72.

A puddle shrinks as the water becomes gas. This is an example of what?

a)

Evaporation

b)

Freezing

c)

Melting

d)

Condensation

73.

What is NOT true about solids.

a)

Solids have a fixed volume

b)

Solids have a fixed shape

c)

Solids have the lowest kinetic energy

d)

Solid particles can move past each other

74.

Which is true about gases?

a)

Gas particles have the lowest kinetic energy

b)

Gas particles have a fixed volume

c)

Gases take the shape of their container.

d)

Gases have a high density.

75.

Which state of matter has the highest kinetic energy

a)

Solid

b)

Liquid

c)

Gas

76.

Freezing and Melting happen at the same temperature

a)

True

b)

False

77.

The drops of water that appear on the outside of a cold glass of water on a hot day are an example of what?

a)

Boiling

b)

Condensation

c)

Melting

d)

Sublimation

78.

Heating a gas causes the particles to...

a)

Go faster

b)

Go slower

c)

Remain at the same speed

d)

Condense into a liquid

79.

What is the change of state from a solid to a liquid called?

a)

Boiling

b)

Sublimation

c)

Freezing

d)

Melting

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