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Physical Science - Final Review Chapter 1 and 2

Total questions: 100

Worksheet time: 2hrs 56mins

Name
Class
Date
1.

A scientific Law _____________________. (choose all that apply)

a)

predicts events under certain conditions

b)

explains related observations

c)

is supported by experimental evidence

d)

usually has a formula

e)

may be changed when new discoveries are made

2.
Scientific theories are based on
a)
general assumptions of how systems work.
b)
mathematical principles that can be proven true.
c)
large amounts of data collected over time.
d)
observations from within only one scientific discipline.
3.

Theories are based on thousands of supported hypothesis and tons of physical evidence.

a)

True

b)

False

4.

If you can set up an experiment to determine if it is true or not, you are most likely testing out a ___________.

a)

hypothesis

b)

theory

5.
A scientific law ___________ explain the pattern that it describes.
a)
does not
b)
does
6.

When a scientist makes a quick guess about something, it is called a scientific theory.

a)

True

b)

False

7.

A scientific theory explains how or why things happen in nature.

a)

True

b)

False

8.

A scientific theory cannot be modified (changed)

a)

True

b)

False

9.

Scientific laws often include a mathematical relationship observed in nature.

a)

True

b)

False

10.

Which statement below correctly identifies the difference between laws and theories?

a)

Laws describe phenomena, while theories explain why and how phenomena exist

b)

Laws are a statement of fact, while theories are a statement of opinion

c)

Laws explain why phenomena exist, while theories explain how

d)

Laws are a prediction of phenomena, while theories are an explanation

11.
You observe that, upon waking up each morning, your trashcan is overturned and trash is spread around the yard. You propose that raccoons are responsible. Is this fact, a law, a theory, or a hypothesis?
a)
Fact
b)
Law
c)
Theory
d)
Hypothesis
12.

Can you disprove a hypothesis in a single experiment?

a)

yes

b)

no

13.

Can you disprove a scientific theory based on a single experiment?

a)

Yes

b)

No

14.

If you have a situation where a scientist is going to run an experiment, you are most likely looking at a __________.

a)

Scientific Law

b)

Scientific Theory

c)

Hypothesis

d)

All of these

15.

A visual representation of a very small or very large object, system or process is called a?

a)

Chart

b)

Graph

c)

Model

d)

Drawing

16.

A limitation of a solar system model is

a)

The ability to see the size of each planet in relation to each other

b)

Not being able to experience the atmosphere of each planet

c)

The ability to see the sun is the center of our solar system

17.

What is a control group?

a)

A group that has the test variables present. (IV present)

b)

Observations and measurements

c)

The change made during an experiment

d)

A standard for comparison and does not receive an independent variable

18.

What is a dependent variable?

a)

What the experimenter changes

b)

What stays the same

c)

What is being measured

d)

A manipulating variable

19.

What is an independent variable

a)

What is being changed by the experimenter

b)

What is being measured

c)

A responding variable

d)

What is left alone throughout the experiment

20.

What is an observation?

a)

Something you measure or detect with your senses.

b)

The way you feel about something

c)

An educated guess

d)

A theory that has been disproved

21.

Which of the following is NOT a testable question?

a)

How do rockets work?

b)

Does fertilizer help plants grow bigger?

c)

Does heart rate increase with exercise?

d)

Does the freezing point of water change at different elevations?

22.

What is a hypothesis?

a)

An educated prediction or answer to a testable question

b)

A random guess

c)

An observation based on feelings or emotions

d)
23.

An observation that is measurable and made with tools (such as a ruler or scale) is what type

a)

quantitative

b)

qualitative

c)

koalatative

24.
Carmen conducted an experiment to determine if listening to different types of music would affect a person’s pulse. Her hypothesis was that pulse rate would change with different types of music. Each person listened to seven different selections of music for 30 seconds each. Each person’s pulse was taken before the music and then after each 30-second interval of music. The pulses were taken again after the music selections were completed. Based on her experiment, Carmen concluded that a person’s pulse rate changed when the person listened to different types of music.  Which component is missing from Carmen’s experiment?
a)
a question
b)
a hypothesis
c)
a control group
d)
a description of the experiment
25.
In an appropriately designed experiment, a scientist is able to test the effect of
a)
 a single variable
b)
 multiple variables
c)
 the hypothesis
d)
 scientific observations
26.
An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rates of two groups of people at rest were measured. Group A was then given caffeinated soda and group B was given caffeine-free soda. One hour after drinking the soda, the pulse rates were measured. The participants in the experiment were all the same age, and they were all given the same amount of soda. The dependent variable in this experiment is the
a)
type of soda given to each group
b)
amount of soda given to each group
c)
 pulse rate of each group
d)
age of participants in each group
27.
This variable in an experiment is the one being changed by the scientist. 
a)
dependent variable
b)
independent variable
c)
data
d)
control group
28.
Dependent variable means
a)
the scientist controls what to test
b)
educated guess
c)
ask a question
d)
what is being measured
29.
If you increase the amount of spinach you eat, then you will increase the iron in your blood. 
What's the dependent variable?
a)
increase the amount of iron in your blood
b)
spinach you eat
30.
If I ride my bike to school instead of walking, then I will get to school faster. What is the dependent variable?
a)
True
b)
How fast you get to school
c)
Riding a bike or walking
d)
False
31.

400 grams =____kilograms

a)

0.4kg

b)

4kg

c)

40kg

d)

40,000kg

32.
Given that 1 yard is approximately 0.914 meter, 50 yards would be equivalent to approximately how many meters?
a)
45.7 meters
b)
49.09 meters
c)
50.91 meters
d)
54.7 meters
33.
1 Km = ______m
a)
1
b)
10
c)
100
d)
1000
34.
100 cm = ______m
a)
1
b)
10
c)
100
d)
1000
35.
45 cm = ___ mm
a)
450 mm
b)
4,500 mm
c)
45 mm
d)
4.5 mm
36.

9 meters = ___________cm

a)

900 cm

b)

90 cm

c)

0.9 cm

d)

0.09 cm

37.
When going from a larger unit to a smaller unit ...
a)
Someone was eating healthy
b)
Multiply
c)
Divide
d)
Times 10
38.
When going from a smaller unit to a larger unit ...
a)
There must of been protein involved
b)
Multiply
c)
Divide
d)
Times 10
39.
Convert 300 meters to centimeters:
a)
3000 cm
b)
0.3 cm
c)
30,000 cm
d)
3 cn
40.
490,000 g =____ kg
a)
490
b)
49
c)
4,900
d)
0.49
41.
Is 20 g greater than, less than, or equal to 2 kg?
a)
greater than
b)
less than
c)
equal to
42.
42 L = ___mL
a)
4,200
b)
.0042
c)
4.20
d)
42,000
43.

Mixture or Pure Substance?

a)

Mixture

b)

Pure Substance

44.

Mixture or Pure Substance?

a)

Mixture

b)

Pure Substance

45.

Mixture or Pure Substance?

a)

Mixture

b)

Pure Substance

46.

Mixture or Pure Substance?

a)

Mixture

b)

Pure Substance

47.

matter is categorized as _____ or _____

a)

an element or compound

b)

homogeneous or heterogeneous

c)

a pure substance or mixture

d)

a compound or mixture

48.

Contains two or more different substances that are physically, not chemically, combined

a)

a mixture

b)

an element

c)

a compound

d)

a chemical formula

49.

Heterogeneous mixture

a)

A mixture with a composition that varies from point to point

b)

A mixture with a uniform composition and appears visually the same throughout

50.

Homogeneous mixture

a)

A mixture with a composition that varies from point to point

b)

A mixture with a uniform composition and appears visually the same throughout

51.

A substance that can NOT be broken down by physical or chemical means

a)

element

b)

compound

c)

mixture

52.

A substance that can be broken down by physical means is ...

a)

an element

b)

a compound

c)

a mixture

53.

Oxygen

a)

Element

b)

Compound

54.

Water

a)

Element

b)

Compound

55.

Sand

a)

Mixture

b)

Compound

56.

Chicken noodle soup

a)

Homogeneous mixture

b)

Heterogeneous mixture

57.

Air:

Pure Substance or Mixture?

a)

Pure Substance

b)

Mixture

58.

Aluminum:

Pure Substance or Mixture?

a)

Pure Substance

b)

Mixture

59.

Dr. Pepper:

Pure Substance or Mixture?

a)

Pure Substance

b)

Mixture

60.

Salt:

Pure Substance or Mixture?

a)

Pure Substance

b)

Mixture

61.

[check all that apply] Pure substances include:

a)

Elements

b)

Homogeneous Mixtures

c)

Compounds

d)

Heterogeneous Mixtures

62.

Saltwater is

a)

Mixture

b)

Compound

63.

Vinegar is

a)

Homogeneous mixture

b)

Heterogeneous mixture

64.

In a mixture, which of the following is always true?

a)

It is a liquid.

b)

It contains dissolved solids.

c)

It is composed of two or more pure substances.

d)

It cannot be separated into individual components.

65.

A bottle of dishwashing detergent contains a clear, viscous liquid. The label has a long list of ingredients, including water, sodium lauryl sulfate, fragrance, and Blue dye #5.

What can you infer about the material in the bottle from this label and the appearance of the liquid?

a)

It is a pure substance.

b)

It is a compound.

c)

It is a heterogeneous mixture.

d)

It is a homogeneous mixture.

66.

The matter represented by this model is a

a)

pure substance

b)

mixture

c)

element(s)

d)

compound(s)

e)

element(s) and compound(s)

67.

The matter represented by this model is a

a)

pure substance

b)

mixture

c)

element(s)

d)

compound(s)

e)

element(s) and compound(s)

68.

The matter represented by this model is a

a)

pure substance

b)

mixture

c)

element(s)

d)

compound(s)

e)

element(s) and compound(s)

69.

The matter represented by this model is a

a)

pure substance

b)

mixture

c)

element(s)

d)

compound(s)

e)

elements and compounds

70.

The matter represented by this model is a

a)

pure substance

b)

mixture

c)

element(s)

d)

compound(s)

e)

element(s) and compound(s)

71.

The matter represented by this model is a

a)

pure substance

b)

mixture

c)

element(s)

d)

compound(s)

e)

element(s) and compound(s)

72.

The matter represented by this model is a

a)

pure substance

b)

mixture

c)

element(s)

d)

compound(s)

e)

element(s) and compound(s)

73.
What kind of properties can only be observed when a substance changes into a different substance?
a)
physical properties
b)
chemical properties
74.
Which type of property is the ability to conduct electricity?
a)
physical property
b)
chemical property
75.
Properties that can be observed without changing the identity of the substance.
a)
Physical
b)
Chemical
76.
Example for physical property
a)
odor
b)
burns in air
c)
reacts with water to create hydrogen gas
d)
rust
77.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
78.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
rust
79.
A change where one or more new substances are created.
a)
Physical Change 
b)
Chemical Change 
80.
Fizzing, foaming, and burning are all examples of
a)
Chemical change
b)
Physical change
81.
Change in density is a physical change.
a)
True
b)
False
82.
Rust on an iron bar is an example of chemical change.
a)
True 
b)
False
83.
Flammability is an example of what property?
a)
Chemical property
b)
Physical property
84.
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
85.
Which property is an example of a chemical property?
a)
The ability to burn
b)
The ability to dissolve
c)
The ability to evaporate
d)
The ability to melt
86.
Density, melting point, boiling point:These may all be classified as
a)
chemical properties
b)
physcial properties
87.
This is an example of a
a)
physical change
b)
chemical change
88.
Ability to rust is this type of property:
a)
Physical property
b)
Chemical property
89.
Paper burning and metal rusting are examples of a
a)
physical property
b)
chemical property
c)
physical change
d)
chemical change
90.
The formation of a precipitate is evidence that a _________________ has taken place.
a)
physical property
b)
chemical property
c)
physical change
d)
chemical change
91.
The formation of gas bubbles is evidence that a _________________ has taken place.
a)
physical property
b)
chemical property
c)
physical change
d)
chemical change
92.

An ice cream cone melts in a kid's hand while walking outside on a hot summer day. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

93.

A silver ring gets tarnished (becomes dull) as a result of being exposed to air and moisture. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

94.

Water boils at 100˚C. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

95.

A pastry chef bakes a cheesecake. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

96.

A burglar smashes the window of a nearby car to steal some money. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

97.

Stomach acid has a pH of approximately 2. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

98.

Mercury is a metal that is liquid at room temperature. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

99.

Helium is an element that is unreactive . What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

100.

A student rips up his exam paper in frustration. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

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