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SCIENCE REVIEW #2

Total questions: 56

Worksheet time: 1hrs 6mins

Name
Class
Date
1.

What force ultimately slows the roller coaster to a stop?

a)

Applied

b)

Normal

c)

Friction

d)

Magnetic

2.
Jupiter has about 317 times more mass than Earth. What can you infer from this fact? 
a)
That Jupiter’s gravitational force is much weaker than on Earth’s gravitational force.
b)
That Jupiter’s gravitational force is much stronger than Earth’s gravitational force.
c)
That Jupiter’s and Earth’s gravitational forces are equal.
d)
Mass has no effect on the gravitational force between two objects
3.

The ram on a crane uses the force of kinetic energy to push a spike into the ground. From which position should the ram be released to have the greatest kinetic energy when it hits the spike?

a)

1

b)

2

c)

3

d)

4

4.

During an investigation on energy, Seth rolls marbles of four different masses down a ramp. Which size marble will have the greatest kinetic energy when it reaches the bottom of the ramp?

a)

2 grams

b)

3 grams

c)

5 grams

d)

6 grams

5.

Look at the drawing below of a bouncing ball. Which correctly identifies the sequence of the types of energy shown in the drawing?

a)

kinetic, potential, potential, kinetic

b)

potential, kinetic, kinetic, potential

c)

kinetic, kinetic, potential, kinetic

d)

potential, potential, kinetic, kinetic

6.

The force that attracts objects to the center of the Earth

a)

Friction

b)

Air resistance

c)

Motion

d)

Gravity

7.

A ball is sitting at the top of a ramp. As the ball rolls down the ramp, the potential energy of the ball decreases. What happens to the potential energy as the ball moves?

a)

It is lost as gravitational energy.

b)

It is destroyed as the ball moves.

c)

It is converted to kinetic energy

d)

It is used to make the ball slow down.

8.

Which picture of the rock has the LEAST amount potential energy and the GREATEST amount of kinetic energy? Read the answers carefully!

a)

Rock A

b)

Rock B

c)

Rock D

d)

Rock E

9.

At what point is Mary about to transfer

Potential Energy to Kinetic Energy?

a)

Position A

b)

Position B

c)

They are both the same at all places

d)

Mary never has potential energy

10.
Choose the BEST answer that describes how the mass of an object affects its motion.
a)
The greater the mass of an object, the slower the motion of the object.
b)
The greater the mass of an object, the faster the motion of the object.
c)
The greater the mass of an object, the greater the force to move the object.
d)
The greater the mass of an object, the greater the distance the object will travel.
11.

Four cars are at the starting line of a race. Which car will require the most force to start moving?

a)

car with mass of 1200 kilograms

b)

car with mass of 1500 kilograms

c)

car with mass of 1700 kilograms

d)

car with mass of 2000 kilograms

12.

A ball was rolling fast and then slowed. Which most likelycaused the ball to slow?

a)

heat

b)

friction

c)

momentum

d)

wind

13.
__________ is stored energy. 
a)
Potential
b)
Kinetic
c)
None of the above 
d)
All of the above 
14.
When a pendulum swings, at which point is kinetic energy highest?
a)
1
b)
2
c)
3
d)
4
15.
When a pendulum swings, at which point is potential energy at its greatest?
a)
1
b)
2
c)
3
d)
4
16.
What would have the greatest kinetic energy?
a)
A car driving down a hill.
b)
A person running down a hill. 
c)
A ball rolling down a hill. 
d)
leaves rolling down a hill 
17.

Which point has the most potential energy?

a)

G

b)

F

c)

B

d)

A

18.
An experiment is being done to determine how light affects the growth of small zinnia plants. One plant is placed in full sunlight, the second in a shaded area, the third in an unlit closet. What is the independent variable in the experiment?
a)
the amount of light
b)
the type of plants
c)
the type of soil
d)
the length of the experiment
19.
This variable in an experiment is the one being deliberately changed by the scientist. 
a)
dependent variable
b)
independent variable
c)
data
d)
control group
20.
Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the independent variable 
a)
Type of fertilizer
b)
Size of sunflower
c)
type of sun flower
21.
Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the dependent variable 
a)
Type of fertilizer
b)
Size of sunflower
c)
Type of sunflower
22.
Molly investigated if the age of students caused them to be better drivers. What is the dependent variable?
a)
Type of car
b)
Skill of driving
c)
Age of student
23.
This variable in an experiment is the one being deliberately changed by the scientist. 
a)
dependent variable
b)
independent variable
c)
data
d)
control group
24.
The part of the experiment that remains the same for the control and experimental group.
a)
constants
b)
control
c)
independent
d)
dependent
25.
When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?
a)
Dependent
b)
Independent
c)
Control
d)
Compound
26.

Vitamin could extend a person's life expectancy. The dependent variable is __________.

a)

amount of vitamin taken

b)

life span

27.

Say you want to know whether caffeine affects your appetite. The presence/absence of a given amount of caffeine would be the __________ variable. How hungry you are would be the __________ variable.

a)

independent , dependent

b)

dependent , independent

28.

"Which brand of bubblegum will have the biggest bubble?"


The size of the bubble is the __________ variable.

a)

independent

b)

dependent

29.

Janet wanted to test whether the large marble or the small marble would roll farther. She set a ramp up to the height of 18 inches. She placed the small blue marble at the top and released it. She measured the distance it traveled at 8 feet. She followed the same procedure with the large green marble. She measured the distance it traveled at 6 feet.

What is the independent variable in Janet's experiment?

a)

the ramp

b)

the marbles

c)

the distance the marbles travelled

30.

Freddie designed an experiment to see which brand of bubble gum would allow him to blow the biggest bubble. He purchased three different brands gum. He chose 1 piece of the first brand and chewed it for exactly 30 seconds. Then, he blew a bubble and measured its circumference. After recording the results, he followed the same procedures with the other 2 brands. He observed that the Big Pop brand allowed him to blow the largest bubble with a circumference of 7.4 inches.

What is the independent variable in Freddie's experiment?

a)

the circumference of the bubbles

b)

the three brands of gum tested

c)

30 seconds

31.

Peter is experimenting to see whether water or soda will freeze first. He pours 2 ounces of water into a small paper cup. Then he pours 2 ounces of soda into another small paper cup. He places both cups in the freezer and shuts the door. Peter checks the cups every 5 minutes. Within 30 minutes he notices that the soda has already begun to form ice crystals, while the water has not.

What is the dependent variable in Peter's experiment?

a)

water and soda

b)

the cups

c)

the time it takes the liquids to freeze

32.

Margaret wanted to see which solid melted faster, ice or chocolate. She placed 1 ounce of ice on one blue plate and 1 ounce of chocolate on another blue plate. She placed both plates in the sun. Within five minutes, Margaret could already see a pool of water forming around the ice. What is the dependent variable in Margaret's experiment?

a)

the solid that melted faster

b)

the blue plate

c)

the sun

33.

Freddie designed an experiment to see which brand of bubble gum would allow him to blow the biggest bubble. He purchased three different brands gum. He chose 1 piece of the first brand and chewed it for exactly 30 seconds. Then, he blew a bubble and measured its circumference. After recording the results, he followed the same procedures with the other 2 brands. He observed that the Big Pop brand allowed him to blow the largest bubble with a circumference of 7.4 inches.

What is the independent variable in Freddie's experiment?

a)

the circumference of the bubbles

b)

the three brands of gum tested

c)

30 seconds

34.
What is the independent variable?
Chocolate may cause pimples
a)
chocolate
b)
pimples
c)
food
d)
may cause
35.
An investigation was done to see if keeping the lights on for different amount of time each day affected the number of eggs the chicken lay.  Select the dependent variable.
a)
Keeping the lights on
b)
Amount of time each day
c)
Number of eggs the chicken lay
d)
Investigation
36.
When two magnets attract, they ______________
a)
push apart
b)
change color
c)
get colder
d)
pull together
37.
Magnets have a north and a south ___________
a)
shape
b)
color
c)
pole
d)
region
38.
A north pole and a south pole will attract.
a)
True
b)
False
39.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
40.
What kind of magnet can be turned on and off?
a)
refridgerator magnet
b)
electromagnet
c)
magnetite
d)
iron
41.
The strongest part of a magnet is...
a)
the bars.
b)
the force field.
c)
the poles. 
d)
the middle.
42.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled
43.
You can make an electromagnet stronger by...
a)
increasing the current through the wire
b)
make the iron core bigger
c)
increase the number of loops around the core
d)
All of these
44.
How are electromagnets different from magnets?
a)
magnets can be turned on/off
b)
you can turn an electromagnet on/off
c)
magnets are more powerful
d)
magnets have a North and South pole
45.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
a)
Add more coils of wire to the nail.
b)
Use a smaller battery.
c)
Reverse the poles of the magnet.
d)
Remove all the coils and the nail.
46.
A student makes an electromagnet as shown above and finds that it is only strong enough to pick up one paper clip. What modification will she need to do in order to make it pick up three paper clips?
a)
wrap more coils around the nail
b)
use staples instead of paper clips
c)
replace the battery with a bar magnet
d)
use paper clips made of aluminum
47.
The coil of the electromagnet must be connected to a __________ or another source of electricity.
a)
battery
b)
wire
c)
magnet
48.

Which is needed to determine the amount of gravitational force between two objects?

a)

distance and mass

b)

weight and time

c)

area and weight

49.

The picture shows three objects gravitationally interacting with each other. Which object exerts the greatest force on object B?

a)

Object A

b)

Object C

c)

A and C exert an equal force on B

d)

Cannot be determined

50.
What are the two factors that influence gravity the most?
a)
Mass and weight
b)
Weight and gravity
c)
Mass and distance
d)
Weight and distance
51.
Which has more mass, Earth or the Moon?
a)
Earth
b)
Moon
c)
The same
52.

When will the gravity between two objects be the LEAST?

a)

when the masses of both objects is small and the objects are close together

b)

when the masses of both objects is small and the objects are far apart

c)

when the masses of both objects is large and the objects are close together

d)

when the masses of both objects is large and the objects are far apart

53.
As mass increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know
54.
Which system has the greater gravitational attraction between the two objects (if any)?
a)
System A
b)
System B
c)
Same gravitational attraction fro System A and System B
55.
Which model has greater gravitational attraction (if any)
a)
Model A
b)
Model B
c)
Both Model A and Model B (same gravity)
56.
As the distance between 2 objects increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know

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