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Unit 1-2 Test Review

Total questions: 50

Worksheet time: 3hrs 30mins

Name
Class
Date
1.

What is a control group?

a)

Something that changes

b)

A separate group, without the independent variable, used to compare

c)

A separate group, with the independent variable. Is tested.

2.

A variable is

a)

something that changes

b)

something that stays the same

3.

A constant is

a)

something that changes

b)

something that stays the same

4.

The dependent variable...

a)

is tested in the experiment " I change"

b)

is what is measured "Data"

5.

The independent variable

a)

is tested in the experiment " I change"

b)

is what is measured "Data"

6.

A scientist is testing the effect of insecticide on plant growth. The independent variable is -

a)

insecticide

b)

plant growth

c)

type of plant

d)

a plant that does not receive the insecticide

7.

A scientist is testing the effect of insecticide on plant growth. The dependent variable is -

a)

insecticide

b)

plant growth

c)

type of plant

d)

a plant that does not receive the insecticide

8.

A scientist is testing the effect of insecticide on plant growth. The control (group) is -

a)

insecticide

b)

plant growth

c)

type of plant

d)

a plant that does not receive the insecticide

9.

A scientist is testing the effect of insecticide on plant growth. A constant would be -

a)

insecticide

b)

plant growth

c)

type of plant

d)

a plant that does not receive the insecticide

10.

Convert 0.0058 to scientific notation

a)

5.8 x 103

b)

5.8 x 104

c)

5.8 x 10-3

d)

5.8 x 10-4

11.

2.5 km = ________ m (Use KHD u dcm)

a)

250 m

b)

2500 m

c)

.0025 m

d)

25

12.

2.5 mL = ________ hL (Use KHD u dcm)

a)

250 m

b)

0.25 m

c)

0.000000000000025 m

d)

0.000025

13.

A graduated cylinder measures -

a)

mass (g)

b)

volume (mL)

c)

force (N)

d)

temperatures (°C)

14.

Density is ...

a)

how tightly packed together matter is. D = m/v

b)

the amount of matter in an object in space. D = m/v

c)

how tightly packed together matter is. D = m*v

d)

the amount of matter in an object under water D = m*v

15.

Water freezes at--

a)

0°F, 32°C

b)

70°F, 21°C

c)

98.6°F, 37°C

d)

0°C, 32°F

16.

If something is flammable, that means it can...

a)

easily catch fire

b)

become a bio-hazard

c)

be radioactive

d)

dance really well

17.

What is the volume of the blue fluid in the graduated cylinder?

a)

10 mL

b)

7 mL

c)

8 mL

d)

9 mL

18.

This picture represents a close-up of the reading for an object on a triple beam balance. About how much mass does the unseen object contain?

a)

568.7 g

b)

567.5 g

c)

605007.5 g

d)

657.5 g

19.

What is the independent variable in this experiment?

a)

pH of soil

b)

Average Plant Growth (cm)

20.

What is the dependent variable in this experiment?

a)

pH of soil

b)

Average Plant Growth (cm)

21.

Acid + Base =

a)

Sulfur

b)

Ammonia

c)

Salt and a little bit of vinegar

d)

Salt and a little bit of water

22.

A substance with a pH of 7 is -

a)

acid

b)

base

c)

neutral

d)

salt

23.

A substance with a pH of 2 is -

a)

acid

b)

base

c)

neutral

d)

salt

24.

A substance with a pH of 11 is -

a)

acid

b)

base

c)

neutral

d)

salt

25.

If I mix a substance with a pH of 9 and a pH of 5, I will get -

a)

acid

b)

base

c)

salt and a little bit of water

d)

a headache

26.

A pure substance made of a single type of atom

a)

Element

b)

Compound

c)

Mixture

27.

A pure substance made of different elements that have been chemically combined to form a new substance

a)

Element

b)

Compound

c)

Mixture

28.

Two or more substances that are physically combined and retain their original properties

a)

Element

b)

Compound

c)

Mixture

29.

Which of these are organic compounds? Why?

a)

They contain carbon and are from something that is or was alive

b)

They contain hydrogen and are from something that was never alive

c)

Glucose: C₆H₁₂O₆

d)

Methane: CH4

e)

Hydrogen Peroxide: H2O2

30.

Concrete (cement, gravel, water)

a)

Homogeneous Mixture

b)

Heterogeneous Mixture

31.

Window cleaner (Windex)

a)

Homogeneous Mixture

b)

Heterogeneous Mixture

32.

Matter is made of

a)

tiny particles that never move and are attracted to each other (thus having potential energy)

b)

molecules that constantly move and hit each other (thus having kinetic energy)

c)

large particles that rarely move and are repelled by each other

33.

Water changing from a gas to a liquid

a)

melts / liquifies

b)

freezes / solidifies

c)

evaporates / vaporizes

d)

condenses

34.

Water changing from a liquid to a gas

a)

melts / liquifies

b)

freezes / solidifies

c)

evaporates / vaporizes

d)

condenses

35.

Water changing from a solid to a liquid

a)

melts / liquifies

b)

freezes / solidifies

c)

evaporates / vaporizes

d)

condenses

36.

Water changing from liquid to a solid

a)

melts / liquifies

b)

freezes / solidifies

c)

evaporates / vaporizes

d)

condenses

37.

The amount of matter in an object

a)

Matter

b)

Mass

c)

Volume

d)

Density

38.

The amount of space an object occupies

a)

Matter

b)

Mass

c)

Volume

d)

Density

39.

Anything with mass and volume ("stuff")

a)

Matter

b)

Mass

c)

Volume

d)

Density

40.

How tightly packed together matter is (mass divided by volume)

a)

Matter

b)

Mass

c)

Volume

d)

Density

41.

An object can be hammered or molded into shape without breaking (metals, clay)

a)

Solubility

b)

Luster

c)

Malleability

d)

Ductility

42.

Shiny

a)

Solubility

b)

Luster

c)

Malleability

d)

Ductility

43.

Can be dissolved (typically in water)

a)

Solubility

b)

Luster

c)

Malleability

d)

Ductility

44.

Can be stretched into a wire

a)

Solubility

b)

Luster

c)

Malleability

d)

Ductility

45.

color, size, shape, odor, luster, viscosity, density, volume, mass, weight, state, malleable, ductile, soluble, conductor

a)

Physical Properties

b)

Chemical Properties

46.

Flammable, Reactive (air, water, acid, base)

a)

Physical Properties

b)

Chemical Properties

47.

Select all that apply. Solids--

a)

have definite shape

b)

have definite volume

c)

take the shape of their containers

d)

are easily compressed

e)

have strong bonds

48.

Select all that apply. Liquids--

a)

have definite shape

b)

have definite volume

c)

take the shape of their containers

d)

are easily compressed

e)

have strong bonds

49.

Select all that apply. Gasses--

a)

have definite shape and volume

b)

do not have definite shape or volume

c)

fill their containers

d)

are easily compressed

e)

have strong bonds

50.

Matter is made of

a)

tiny particles that never move and are attracted to each other (thus having potential energy)

b)

molecules that constantly move and hit each other (thus having kinetic energy)

c)

large particles that rarely move and are repelled by each other

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