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Worksheets

Unit 1 Review

Total questions: 127

Worksheet time: 2hrs 12mins

Name
Class
Date
1.

Explains something we see in the natural world that has been verified through repeated experiments or testing.

a)

hypothesis

b)

law

c)

theory

d)

Inference

2.

This variable is the one thing that changed on purpose...

a)

Dependent Variable

b)

Control

c)

Independent Variable

3.

What is the DEPENDENT variable (effect) in this experiment?


"Does eating breakfast improve test scores?"

a)

eating breakfast or not

b)

the grade you got on the test

c)

what time you get up in the morning

d)

how tasty the breakfast is

4.

You are testing how the amount you water a plant affects its growth. What would be the INDEPENDENT VARIABLE in this experiment.

a)

They type of pot you put the plants in.

b)

The amount you water each plant.

c)

The amount of sunlight the plants get.

d)

The amount the plant grows.

5.

What are the constant variables?

a)

what we are changing or testing

b)

what we are observing or measuring

c)

what we keep the same to make the experiment fair

6.

The _ is an organized set of investigation procedures used by scientists.

a)

scientific method

b)

scientific law

c)

scientific theory

7.

A _ is a standard used for comparison; it is kept in "normal" conditions.

a)

hypothesis

b)

control group

c)

dependent variable

d)

control variables

8.

A rule of nature that sums up related observations to describe a pattern in nature is a _.

a)

scientific law

b)

hypothesis

c)

scientific theory

9.

Identify the dependent variable according to this graph.

a)

Seed Type

b)

Number of Bird Species

c)

Sunflower and Sorghum

d)

Sunflower

10.

What is the purpose of the scientific method?

a)

to answer questions

b)

to create solutions to problems

c)

to collect data based on an experiement

d)

to get peer reviewed

11.
Blue Color: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
12.
Density: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
13.
Flammability (burns): Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
14.
Reacts with Acid: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
15.
Melting Point: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
16.
Boiling Point: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
17.
Odor: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
18.
Ability to rust is this type of property:
a)
Physical property
b)
Chemical property
19.
Physical properties are
a)
properties that can be observed without changing the identity of the substance
b)
properties that describe how a substance changes into a completely different substance
20.
which one is the definition of chemical property?
a)
a property or characteristic of a substance that is observed during a reaction where the chemical composition of a substance is changed
b)
any change that results in the formation of new chemical substances
c)
combustibility
21.
Is milk going sour a physical or chemical change?
a)
Physical 
b)
Chemical
22.
Is sharpening a pencil a physical or chemical change?
a)
Physical 
b)
Chemical
23.

Glass breaking

a)

Physical Change

b)

Chemical Change

24.

A rusting bicycle

a)

Physical Change

b)

Chemical Change

25.

Freezing chocolate-covered bananas

a)

Physical Change

b)

Chemical Change

26.

Separating sand from gravel

a)

Physical Change

b)

Chemical Change

27.

Spoiling food

a)

Physical Change

b)

Chemical Change

28.

Burning toast

a)

Physical Change

b)

Chemical Change

29.

Is melting butter for popcorn a chemical or physical change?

a)

chemical

b)

physical

30.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
rust
31.
Freezing Juice?
a)
Physical Change
b)
Chemical Change
32.
Fizzing, foaming, and burning are all examples of
a)
Chemical change
b)
Physical change
33.

Rust on an iron bar is an example of chemical change.

a)

True

b)

False

34.

When you break a cracker into pieces it is a...

a)

Chemical change

b)

Physical change

35.
Dissolving sugar in water is an example of a 
a)
physical change
b)
chemical change
36.
Digesting your food is an example of 
a)
chemical change
b)
physical change
37.
Melting a chocolate bar?
a)
Physical Change
b)
Chemical Change 
38.
Rotting bananas?
a)
Physical Change
b)
Chemical Change
39.
Cutting your hair?
a)
Physical Change
b)
Chemical Change
40.

Which ones can be units for density?

(Multiple responses)

a)

g/ mL

b)

g

c)

gcm3\frac{g}{cm^3}  

d)

cm4cm^4  

41.

What is the mass of a 25 cm3  liquid if it has a density of 5 g/cm3?

a)

125 g

b)

5 g

c)

5gcm3\frac{5g}{cm^3}  

d)

0.2 cm30.2\ cm^3  

42.
Helium balloons rise on earth because
a)
helium is less dense than air
b)
helium is more dense than air
c)
helium is cooler than air
d)
helium is warmer than air
43.

In this image, the VOLUME of A is _____ the volume of B

a)

equal to

b)

greater than

c)

less than

44.

Calculate the density of the rectangular prism

a)

2 g/cm3

b)

4 g/cm3

c)

6 g/cm3

d)

8 g/cm3

45.

What happens to the density of the balloon if volume is doubled?

a)

The density is cut in half.

b)

The density stays the same.

c)

The density doubles.

d)

Not enough information to tell.

46.

As a substance is COOLED its VOLUME...

a)

increase

b)

decreases

c)

remains equal

47.

As a substance is COOLED it's DENSITY...

a)

increase

b)

decreases

c)

remains equal

48.

As a substance is HEATED it's DENSITY...

a)

increase

b)

decreases

c)

remains equal

49.

Three liquids and two solids are placed in a graduated cylinder. The substances arrange themselves in the cylinder according to their densities. Use the information to identify the liquids and solids in the graduated cylinder. start with the top solid as substance 1, and the top liquid as substance 2, and so on

a)

Gold

b)

Mercury

c)

water

d)

Gasoline

e)

Cork

1)
2)
3)
4)
5)
50.

Using the equation ρ=mV\rho=\frac{m}{V}  work out the density of this object.

a)

2.7 kgm3\frac{kg}{m^3}  

b)

7.2 kgm3\frac{kg}{m^3}  

c)

0.72 kgm3\frac{kg}{m^3}  

d)

0.27 kgm3\frac{kg}{m^3}  

51.

What is the density of this cylinder?

a)

0.077 kgm3\frac{kg}{m^3}  

b)

0.77 kgm3\frac{kg}{m^3}  

c)

7.7 kgm3\frac{kg}{m^3}  

d)

77 kgm3\frac{kg}{m^3}  

52.

What is the density of the sphere, if its mass is 50 g?

a)

40 grmL\frac{40\ gr}{mL}  

b)

65mLg\frac{65mL}{g}  

c)

2 gcm3\frac{2\ g}{cm^3}  

d)

25gmL\frac{25g}{mL}  

53.

Which box has a higher density?

a)

A

b)

B

c)

They are the same

54.
Which liquid is the least dense?
a)

oil

b)

water

c)

syrup 

55.

A block of aluminum occupies a volume of 15 cm3 and has a mass of 40.5 g. What is its density?

a)

.37 g/mL

b)

605.5 g/mL

c)

2.7 g/mL

d)

25.5 g/mL

56.
Put the liquids in order from most dense to least dense?
a)
4, 3, 2, 1
b)
1, 2, 3, 4
c)
3, 4, 2, 1, 
d)
4, 3, 1, 2
57.
Why does ice float?
a)
Liquid water is less dense than solid water.
b)
Solid water is less dense than liquid water.
c)
Gaseous water is less dense than solid water.
d)
Liquid water is less dense than gaseous water.
58.
Which liquid is the least dense?
a)
oil
b)
water
c)
syrup 
d)
plastic bottle
59.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
60.
Jack has a rock. The rock has a mass of 14 g and a volume of 2 cm3. What is the density of the rock?
a)
7 mL
b)
7 g/cm3
c)
28 g/cm3
d)
1/7 g/cm3
61.

What metric unit of measurement is used to measure small volumes of liquid?

a)

matter

b)

cubic centimeter

c)

mass

d)

milliliter (mL)

62.

What metric unit of measurement is used to measure small amounts of mass?

a)

volume

b)

cubic centimeter

c)

gram

63.

A block has a mass of 54g and a volume of 20cm3. What is the density of the block?

a)

74 g/cm3

b)

1080 g/cm3

c)

34 g/cm3

d)

2.7 g/cm3

64.

Helium balloons rise on earth because

a)

helium is less dense than air

b)

helium is more dense than air

c)

helium is cooler than air

d)

helium is warmer than air

65.
Matter is a composition that is always the same is...
a)
Mixture
b)
Atom
c)
Matter
d)
Substance
66.
Substance that consists of one type of atom.  It is a pure substance. Found on the Periodic Table. 
a)
Element
b)
Compound
c)
Mixture
d)
I don't know
67.
A type of substance containing atoms of two or more elements chemically bonded together is a mixture.
a)
Ture
b)
False
68.
Combinations of 2 or more substances (elements and compounds) that are physically blended together. 
a)
Compound
b)
Mixture
c)
Element
d)
Substance
69.
Salad is an example of...
a)
a mixutre
b)
an element
c)
a compound
70.
Pure oxygen (O) is an example of...
a)
an element
b)
a mixture
c)
a compound
71.
An example of ...
a)
A mixture
b)
A compound
c)
An element 
72.
Combination of two or more substances that are not chemically combined.
a)
mixture
b)
solution
c)
solvent
d)
solute
73.
If a mixture has components you can see it is a...
a)
solution
b)
compound
c)
homogeneous mixture
d)
heterogeneous mixture
74.
You are about to open an iced coffee, and notice the label says to "shake well", the drink must be a...
a)
solution
b)
colloid
c)
suspension
d)
compound
75.
Which list has the types of mixtures ordered from largest particle size to smallest?
a)
suspension, colloid, and solution
b)
solution, suspension, and colloid
c)
colloid, solution, and suspension
d)
solution, colloid, and suspension
76.
Italian Salad Dressing
a)
heterogeneous mixture
b)
homogeneous mixture
77.
What is Kool-aid?
a)
element
b)
Heterogeneous Mixture
c)
Homogeneous Mixture
d)
Compound
78.
What is the term for combining 2 or more DIFFERENT atoms together?
a)
atoms
b)
elements
c)
molecules
d)
compounds
79.

A Mixture is defined as

a)

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

b)

A combination of compounds that are chemically bonded

c)

2 or more elements chemically bonded

80.

Colloids are

a)

Clear mixtures that have fully dissolved parts

b)

A mixture that will separate into different parts when left to settle

c)

A suspension that appears cloudy and scatters light

d)

A solution that has all parts visible

81.

A Taco is an example of a

a)

Homogeneous Mixture

b)

Heterogeneous Mixture

82.
TRUE OR FALSE:
Every compound is a molecule but not every molecule is a compound.
a)
TRUE
b)
FALSE
83.
Are these molecules also compounds?
a)
YES
b)
NO
84.
Are these molecules also compounds?
a)
YES
b)
NO
85.

Identify the substance in box B.

a)

element

b)

compund

c)

mixture

86.

Identify the substance in box D.

a)

element

b)

compound

c)

mixture

87.

All matter can be classified as _________.

a)

elements or compounds

b)

compounds or mixtures

c)

pure substances or mixtures

88.

Identify the substance in box Y.

a)

element

b)

compound

c)

mixture

89.

Identify the substance in box W.

a)

element

b)

compound

c)

mixture

90.

Identify this substance.

a)

element

b)

compound

c)

mixture

91.

Identify this substance.

a)

element

b)

compound

c)

mixture

92.

Identify this substance.

a)

element

b)

compound

c)

mixture

93.

What is the difference between a compound and a mixture?

a)

one is made of only 1 element, the other is made of several elements

b)

a mixture does not have a chemical formula

c)

a compound can be made many different ways

94.

Identify the substance.

a)

element

b)

compound

c)

mixture

95.

What is the difference between a pure substance and a mixture? Select all that apply.

a)

substances are made of many different things while mixtures are just made of 1

b)

a substance has one type of particle while a mixture has 2 or more types

c)

a mixture is physically combined and can be physically separated while a substance is chemically bonded

d)

a mixture is chemically bonded together while a substance is physically combined

96.

What pure substance is made of 2 or more types of atoms?

a)

compound

b)

element

97.

Identify the following

a)

compound

b)

homogeneous mixture

c)

element

d)

heterogeneous mixture

98.

Identify the following

a)

compound

b)

homogeneous mixture

c)

element

d)

heterogeneous mixture

99.

Identify the following

a)

compound

b)

homogeneous mixture

c)

element

d)

heterogeneous mixture

100.

Identify the following

a)

compound

b)

homogeneous mixture

c)

element

d)

heterogeneous mixture

101.

How many significant figures: 20 pencils.

a)

2

b)

1

c)

unlimited

d)

3

102.

How many significant figures: 1300 cm.

a)

5

b)

2

c)

4

103.

How many significant figures: 0.0042 grams

a)

4

b)

5

c)

2

104.

How many significant figures: 358.2 ml.

a)

4

b)

5

c)

unlimited

105.

How many significant figures: 2.00 meters.

a)

2

b)

3

c)

unlimited

106.

How many significant figures: 145000 cm.

a)

2

b)

3

c)

6

107.

How many significant figures: 0.005003 L.

a)

2

b)

7

c)

4

108.

How many significant figures: 107 voters.

a)

unlimited

b)

3

c)

2

109.

How many significant figures: 0.8 meters.

a)

2

b)

1

c)

unlimited

110.

How many significant figures: 7.1 × 1037.1\ \times\ 10^3

a)

4

b)

5

c)

2

111.

How many significant figures: 46.002 grams.

a)

5

b)

3

c)

unlimited

112.

How many significant figures: 60 minutes = 1 hour.

a)

2

b)

1

c)

unlimited

113.

How many significant figures: 10,800 mm.

a)

2

b)

3

c)

5

114.

How many significant figures: 1000 ants.

a)

1

b)

4

c)

unlimited

115.

How many significant figures: 0.0040005 km.

a)

5

b)

8

c)

2

116.

How many significant figures: 0.0950 meters.

a)

5

b)

3

c)

2

117.

How many significant figures: 60 seconds = 1 minute.

a)

unlimited

b)

2

c)

1

118.

How many significant figures: 9 innings in a baseball game.

a)

1

b)

unlimited

119.

How many significant figures: 48.20 grams of salt.

a)

4

b)

3

c)

unlimited

120.

How many significant figures: 1.072 meters of twizzlers.

a)

3

b)

4

c)

unlimited

121.

Transform 354 grams into kilograms

a)

0.354 kg

b)

3.54 kg

c)

35400 kg

d)

3540 kg

122.

In the conversion factor, which unit should be positioned in the numerator?

a)

yards

b)

leagues

c)

feet

d)

fathoms

123.

In the conversion factor, which unit should be positioned in the denominator?

a)

yards

b)

leagues

c)

feet

d)

fathoms

124.

Convert 2087 feet per second to kilometers per hour. Given that 1000𝑚=1𝑘𝑚 and 0.0254𝑚=1𝑖𝑛.

a)

1356.51km/hr

b)

2,290.02km/hr

c)

5,463.07km/hr

d)

1,636.58km/hr

125.
Complete the statement:
5 cm/min = ______ m/day
(100 cm = 1 m)
a)
72
b)
840
c)
7.2
d)
5,040,000
126.

Jackrabbits are capable of reaching speeds up to 40 miles per hour. How fast is this in feet per second? (Round to the nearest whole number.)

5,280 feet = 1 mile

a)

95 feet per second

b)

59 feet per second

c)

.45 feet per second

d)

40 feet per second

127.

The human esophagus us about 250 mm log. How long is that in inches? 1 in = 2.54 cm

a)

10.64 in

b)

9.84 in

c)

11.35 in

d)

8.84 in