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Science Practice Test for Finals
Science Practice Test for Finals
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1
Why are SI unit used so often in science?
SI units are bigger than English system units
Factors of 10 are easier to work with mathematically
Factors of 3, 12, and 5280 are easier to remember
SI units are more accurate than English system units
2
One is correctly termed a pure substance and the others are mixtures. The substance is
Granite
Chicken noodle soup
Milk
Copper
3
Which of the following are in the correct order from smallest to largest?
Meter, millimeter, centimeter, kilometer
Centimeter, millimeter, meter, kilometer
Millimeter, meter, centimeters, kilometer
Millimeter, centimeters, meter, kilometer
4
Intermolecular forces exert the least attractive force in
Gases
Solids
All phases equally
Liquids
5
The SI unit of force preferred by scientists is the
Mima
Newton
Pound
Kilogram
6
What is the difference between speed and velocity
Speed has both size and direction
Velocity has a distance while speed has a position
Velocity has both size and direction
Velocity and speed are the same thing
7
Without air resistance, as a golf ball up above falls into the well it’s speed is
Directional
Constant
Decreasing
Increasing
8
Which of the following is a projectile
A book sliding across a desk
A baseball hit by a bat
An airplane flying at 30,000 feet
A soccer ball rolling across a field
9
A rocket can fly into space because
When launched hot exhaust gases hit ground push rocket forward
Gas burn up mass of rocket decreases change amount of gravity on rocket
Launchpad pushes rocket forward like a slingshot
Rocket pushes gas backwards and equal and opposite reaction push rocket on
10
Which of the following variables is a vector
Distance
Speed
Velocity
Time
11
Evaporations occurs when
A gas changes into a solid
A gas changes into a liquid
A solid changes into a gas
A liquid changes into a gas
12
What does the speed of light measure?
The distance light travels in one year
The speed of light
The mass of light
How long it takes light to travel from Earth to stars
13
In which phase of matter are molecules or atoms most restricted in the ability to move
Solid
Liquid
Gas
Plasma
14
Orange soda is an example of
Heterogeneous mixture
An atom
Homogeneous mixture
A compound
15
Which of the following would be useful to an engineer while solving a design problem
Evaluations
All of the above
Testing
Prototypes
16
Why is it important to include units when making measurements?
All of the above
Units provide information about the type of measurement
Without units, it is impossible to tell the quantity being measured
Do you need help describe the size of the quantity being measured
17
What would be the best source for finding out the most detail about a new scientific discovery
Your friend
Internet
TV news
Science journal
18
Substance with the same composition throughout containing two or more different type of elements chemically joined is
An atom
A compound
Heterogeneous mixture
Homogeneous mixture
19
The type of relationship represented between variables in the graph pictured is
No relationship
Strong relationship
Weak relationship
Negative relationship
20
Which of the following is a unit of acceleration
m/s
s/m
m/s2
m2/s
21
What does a maglev train use to reduce friction
Ball bearings
Air cushion
Water
Oil
22
The mass of a large paper clip is about the same as:
1 milligram
1 gram
1 kilogram
1 microgram
23
Which of the following forces is a contact force
Magnetism
Electricity
Friction
Gravity
24
What prevents the book from accelerating downward at 9.8 m/s 2
Table presses back up on book was equal and opposite force of 20 N
Table presses back up on book with force greater than 20 N
The inertia of the book holds it up
Table and book together are accelerating downward at 9.8 m/s squared
25
Air Force a BNC are equal work done by forces exerted on box is
Greatest for Force B
Greatest for force A
The same for all forces
Greatest for force C
26
The slope of a position vs. time graph is equal to
Acceleration
Speed
Distance
Area
27
A lever rotates around a fixed point called and
Pulley
Fulcrum
Ball bearing
Gear
28
Vegetable soup is an example of
A homogeneous mixture
A heterogeneous mixture
An atom
A compound
29
What is the value of a conversion factor ratio?
10
3
1
12
30
Water boils at temperature of
0* Fahrenheit
212* Celsius
100* Celcius
32* Fahrenheit
31
A net force must be applied to an object to do all of the following except
Stop moving
Maintain constant speed
Slow down
Turn
32
Which of the following is not a unit of measurement in the metric system?
Second
Meter
Centimeter
Foot
33
One of these is not a unit of distance. Which one?
Mile
Meter
Newton
Inch
34
The application of science to meet human needs and solve problems is called
Science
Technology
Engineer
Experiment
35
On the surface of earth, the force of gravity acting on 1 km is
9.8 newtons
9.8 pounds
22 pounds
2.2 Newtons
36
Many ways to classify matter one way to use two categories for all matter. All matter can be classified as either
Solids or liquids
Atoms or molecules
Mixtures or pure substances
Elements of compounds
37
The rate at which velocity changes is called
Position
Displacement
Speed
Acceleration
38
It’s a large changes in the independent variable cause small changes in the dependent variable
The relationship is negative
The relationship is weak
The relationship is strong
There is no relationship between variables
39
Which of the following is the force needed to make a 1 km object accelerate at 1 m/s2
1 ounce
1 kg
One Newton
1 pound
40
Which of the following is a form of radiant energy
Gasoline
Batteries
Light
Sound
41
A force that resists motion is called
Motion
Friction
Weight
Equilibrium
42
A compound
Can not be separated by physical means
Classified as a pure substance
Made of more than one kind of element
All of the above
43
All of the following are very important parts of learning through inquiry except
Collecting evidence to evaluate your hypothesis
Asking questions instead of being given answers
Proposing explanations
Always getting the right answer immediately
44
An object moving with a constant speed has
A net force equal to zero
A net force less than zero
An unbalanced net force
A net force greater than zero
45
In physics, the term free fall means
The object is dropped from an initial speed of zero
The object is dropped straight down
No force act on the object except gravity
The speed of a falling object remains constant
46
Dimensional analysis is used for
Determine how close a measurement is to the true value
Create a ratio with a valid of 1
Convert units of measurement
Measure the smallest possible interval
47
A graph is
All of the above
A picture that shows how two variables are related
Drawn with the independent variable on the horizontal axis
A mathematical model that helps you interpret the data you collect
48
Which of the following temperature scales is used by most of the world citizens
Fahrenheit
Celsius
Kelvin
Roemer
49
Without any air resistance, as the golf ball up above falls into the well, it acceleration is
Changing
Decreasing
Constant
Increasing
50
When Marissa divides total distance traveled by the total time traveling, she calculates there
Instantaneous speed
Variable speed
Average speed
Constant speed
51
An event during which an important discovery is made accidentally is called discovery by
Scientific method
Design
Serendipity
Trial and error
52
Speed the does not change is called
Average speed
Constant speed
Minimum speed
Instant speed
53
Variables like velocity and acceleration have both size and direction are called
Axes
Dependent
Independent
Vectors
54
Natural laws are
Rules that explain how all things in the entire universe always behave
A preliminary explanation
A form of inquiry
A process of discovering the answers to questions
55
When molecules change from liquid to gas at temperatures below boiling point what is the change called
Condensation
Freezing
Melting
Evaporation
