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7 Science Term 2 week 4 review

Total questions: 45

Worksheet time: 53mins

Name
Class
Date
1.
What is the net force?
a)
40 N left
b)
0 N Balalnced
c)
400 N right
d)
40 N right
2.
What is the net force?
a)
30 N left
b)
25 N right
c)
5 N left
d)
55 N right
3.

Calculate the Net Force.

a)

60N, Left

b)

40N, Right

c)

0 N

d)

60N, Right

4.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
5.
Name the missing force...
a)
frictional force
b)
weight force
c)
thrust
d)
buoyant force
6.

Which freebody diagram best represents an air balloon hovering in the air

a)
b)
c)
d)
7.

Which freebody diagram best represents a desk being pushed across the classroom floor?

a)
b)
c)
d)
8.

Which freebody diagram best represents a bookbag resting on the classroom floor?

a)
b)
c)
d)
9.
Calculate the net force acting upon the object.
a)
10 N east
b)
0 N
c)
14.1 N east
d)
20 N north
10.
Calculate the net force acting upon the object.
a)
10 N north
b)
20 N south
c)
10 N south
d)
22.4 N north
11.

Which two of these forces act on parachutes?

a)

Air Resistance

b)

Gravity

c)

Thrust

d)

Kinetic Energy

12.

What causes an object to fall faster?

a)

Smaller surface area

b)

Larger surface area

c)

If it has a parachute

d)

If it is softer

13.

Another name for air resistance is...

a)

Buoyancy

b)

Streamline

c)

Gravity

d)

Drag

14.

The larger the surface area of the moving object, the ___________ air resistance there is.

a)

Less

b)

More

c)

Longer

d)

Quicker

15.

Air resistance pushes against falling

objects and __________________.

a)

Speeds them up

b)

Keeps them afloat

c)

Slows them down

d)

Spins them

16.

Which has more air resistance?

a)
b)
17.

When dropped from the same distance, which will fall to the floor faster?

a)
b)
18.

Look at the pictures of the cars. Which car will have the most air resistance force acting upon it? They will be moving at the same speed.

a)
b)
c)
d)

All will have equal air resistance force.

19.

What is a parachute designed to maximize?

a)

Gravity

b)

Air Pressure

c)

Air Resistance

d)

Thrust

20.

What is the definition of mass?

a)

Total energy of an object

b)

Total amount of matter inside an object

c)

Gravitational force that acts on object

21.
Which of the following never changes no matter where in the universe?
a)
weight
b)
force
c)
mass
d)
pounds
22.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
23.
The independent variable...
a)
is the thing we measure
b)
is the thing we draw
c)
is the thing we keep the same
d)
is the thing we change
24.

The variable that we measure is called the...

a)

independent variable

b)

control variable

c)

dependent variable

d)

right variable

25.
In a fair test you should...
a)
only change one variable (the independent variable)
b)
change all the variables 
c)
change no variables 
26.

Will a construction paper air plane fly faster than an airplane made from notebook paper? What is the independent variable

a)

type of paper

b)

design of paper plane

c)

distance of flight

d)

speed of paper plane

27.

Will a construction paper air plane fly faster than an airplane made from notebook paper? What is the dependent variable

a)

type of paper

b)

design of paper plane

c)

distance of flight

d)

speed of paper plane

28.

A contact force is from

a)

objects physically touching

b)

far apart objects

c)

not touching object

d)

always a pull

29.

A non-contact force is between

a)

two objects that aren't touching

b)

two objects that are touching

c)

the ground and wheels

d)

you and me

30.

Gravity is a

a)

Contact Force

b)

Myth

c)

Non-contact Force

31.

Friction is a

a)

Contact Force

b)

Myth

c)

Non-contact Force

32.

______________ is a force that always acts in the direction opposite of motion.

a)

applied

b)

friction

c)

gravity

d)

normal

33.

Which of these materials do you predict would have the MOST amount of friction

a)

Metal

b)

Tile

c)

Sand Paper

d)

Denim

34.

Identify the non-contact force?

a)

Friction

b)

Air resistance

c)

Gravity

d)

Water resistance

35.

Which of the following would increase Friction?

a)

Adding a lubricant

b)

using an object with less weight

c)

Using a smoother surface

d)

increasing the surface area

36.
The things that are kept the same to ensure the results are due to the experiment is called..
a)
Control
b)
Constant
c)
Independent Variable
d)
Dependent Variable
37.
The variable the is changed on purpose is..
a)
Constant
b)
Control
c)
Independent Variable
d)
Dependent Variable
38.
The variable that is being tested, counted, or measured and is responding to the independent variable is known as 
a)
Control
b)
Constant
c)
Independent Variable
d)
Dependent Variable
39.
  Pick the control from the following variables..
vanilla ice cream
vanilla ice cream with sprinkles
vanilla ice cream with hot fudge & caramel
a)
Vanilla ice cream
b)
vanilla ice cream with sprinkles
c)
vanilla ice cream with hot fudge & caramel
d)
I like it all
40.
A student wants to test the hypothesis of "If salt is added to water then the boiling point of water will decrease." What is the independent variable?
a)
Amount of salt
b)
Boiling Point
c)
Amount of water
41.
A student wants to test the hypothesis of "If salt is added to water then the boiling point of water will decrease." What is the dependent variable?
a)
amount of salt
b)
boiling point
c)
same amount of water
42.
Plants grow best in colored light. What is the independent variable of this statement?
a)
Plant Growth
b)
Colored Light
43.
Which brand of paper towel will absorb the most liquid? What is the independent variable?
a)
Brand of paper towel
b)
Amount of water absorbed
44.
Which brand of paper towel will absorb the most liquid? What is the dependent variable?
a)
brand of paper towel
b)
amount of water absorbed
45.
Research as shown to support that if students pay attention in class have higher test scores. What is the independent variable?
a)
research
b)
 paying attention 
c)
test scores

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