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Worksheets

Science 7 SE2 Revision

Total questions: 172

Worksheet time: 3hrs 33mins

Name
Class
Date
1.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
2.

A device that uses a free-moving magnetic needle to show direction is a:

a)

Ruler

b)

magnet

c)

compass

d)

magnetic field

3.
Why does a compass needle point north?
a)
The compass is a bar magnet
b)
Because north is up
c)
Because it's magic
d)
It lines up with the Earth's magnetic field
4.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
5.
The magnet's shown will
a)
not move
b)
attract
c)
repel
d)
all of the above
6.
If you cut a magnet in half, what happens to the poles?
a)
One half gets the North Pole, the other half gets the South Pole
b)
Both halves get only a North Pole
c)
Both halves get only a South Pole
d)
Both halves get a North pole and a South Pole
7.

What part of the magnet is the strongest?

a)

North and South poles

b)

Just the North Pole

c)

Just the South Pole

d)

A magnet isn't strong

8.

_________ magnets lose their magnetism quickly

a)

permanent

b)

temporary

c)

electromagnet

d)

ferromagnetic

9.

which object would NOT attract a magnet?

a)

paper clip

b)

pin

c)

glass

d)

nail

10.

what type of magnet is this?

a)

horseshoe

b)

u shaped

c)

bar

11.

what is an example of insulator?

a)

rubber

b)

gold

c)

copper

d)

steel

12.

Which among the following is a non-magnetic substance ?

a)

Iron

b)

Steel

c)

Cobalt

d)

Aluminum

13.

The law of magnetism states that

a)

Like poles attract and unlike poles repel.

b)

A magnet has a north pole and a south pole.

c)

A magnet must have two different poles.

d)

Like poles repel and unlike poles attract.

14.

What is a suitable metal for the core of an electromagnet?

a)

alumunium

b)

copper

c)

iron

d)

steel

15.

The magnetic field around two bar magnets is shown.

Which diagram represents the correct arrangement of magnetic poles?

a)
b)
c)
d)
16.

A material where electrical charges can move easily is a....

a)

insulator

b)

conductor

c)

nothing

d)

rubber

17.

Glass, rubber, wood, and plastic are all examples of ​ (a)   since electricity cannot pass through them.

Choose from the below words
Insulators
Conductors
Thermel conductivity
Materials
18.

Label the atom pictured:

a)Electron
b)Proton
c)Neutron
1
2
3
1)
2)
3)
19.

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)

Decrease the current running through the wire.

c)

Reverse the poles of the magnet.

d)

Remove all the coils and the nail.

20.

Name the type of light wave we can see. 

a)

visible

b)

gamma

c)

ultraviolet

21.

In this GIF, which of the vocabulary represents what is happening in the GIF?

a)

Absorption

b)

Reflection

c)

Transmission

22.

DROP DOWN: The skin taking in the sun is an example of

(a)  

Choose from the below words
Absorption
Transmission
Reflection
23.

True or False:

Light can travel through matter (gas, liquid, solid) and empty space. 

a)

True

b)

False

24.

What does the term reflection mean?

a)

When an object takes in the light

b)

When light passes through an object

c)

When Light bounces off an object

25.

Which type of light wave contains powerful energy made in nuclear explosions and stars?

a)

gamma

b)

x-ray

c)

visible

26.

Which of these provides the best explanation for why the pencil appears broken?

a)

The pencil absorbs the light rays that hit it.

b)

Water reflects light rays away from the pencil.

c)

Light rays are bent by the water in the glass.

d)

The surface of the water reflects the light rays.

27.

What color of light has the shortest wavelength?

a)

red

b)

indigo

c)

yellow

d)

violet

28.

The line that perpendicular to the surface is known as....

a)

incident ray

b)

reflected ray

c)

normal line

d)

angle of reflection

29.

The picture shows an area of Yosemite National Park.Which statement about light is supported by this picture?

a)

Light travels in a straight line until it enters a definite material like water in a lake

b)

Light can refract in air and in clean water

c)

The water in a lake is blue because light forms an image

d)

Light is reflected off the smooth surface of the lake

30.

Why does this apple look red?

a)

The apple reflects red light and absorbs all other colors

b)

The apple absorbs red light and reflects all other colors

c)

The apple reflects all the light shinning on it

d)

The apple is red because we see that color.

31.

The bouncing of light rays off a surface is called....

a)

refraction

b)

reflection

c)

dispersion

32.

A concave lens has an inward curved shape. It refracts light outward from the lens. They light rays spread apart as they exit the lens. Which represents a concave lens and what type of image appear through a concave lens?

a)

Image A / small, upright image

b)

Image B / small, upright image

c)

Image A / small, inverted image

d)

Image B / small, inverted image

33.

What wave behavior allows the human eye to see color?

a)

Interference

b)

Refraction

c)

Diffraction

d)

Reflection

34.

This leaf will

a)

Reflect green light

b)

Absorb green light

c)

Reflect red light

d)

Reflect no light

35.

Which object refracted the laser beam?

a)

Silver locket

b)

Picture frame

c)

Glass marble

d)

Notebook

36.

Which of these provides the best explanation for why the pencil appears broken?

a)

The pencil absorbs the light rays that hit it.

b)

Water reflects light rays away from the pencil.

c)

Light rays are bent by the water in the glass.

d)

The surface of the water reflects the light rays.

37.

What color of light has the longest wavelength?

a)

red

b)

green

c)

yellow

d)

violet

38.

What is the net force acting on the object? (Just write the number)

(a)  

39.

Which of these is a contact force?

a)

Tension

b)

Attraction

c)

Repulsion

40.

What is the unit of force?

a)

Joule (J)

b)

Watt (W)

c)

Newton (N)

41.
Who wins the tug of war with what net force?
a)
The person on the left with 20 N
b)
The person on the left with 80 N
c)
The people on the right with 20 N
d)
The people on the right with 100 N
42.
What is a Force?
a)
The distance
b)
Mass
c)
A push or pull
d)
Give me a  failing grade 
43.

What are the two factors that gravity depends on?

a)

Mass and Type of surface

b)

Distance and Width

c)

Mass and Distance

d)

Distance and Type of surface

44.

Rolling Friction

a)

Two surfaces slide over each other

b)

When a solid moves through a liquid

c)

Occurs on objects that are not moving

d)

An object rolling across a surface

45.

What type of force are the boys and girls using for the tug-of-war ?

a)

Pushing

b)

Pulling

c)

Pushing and Pulling

46.

In a chemical change, new substances are formed, for example

a)

heating glass and bending it

b)

melting an ice

c)

burning of wood

d)

boil water

47.

iron + sulfur --> iron sulfide


from that word equation, the reactant(s) is/are ....

a)

iron

b)

iron and sulfur

c)

sulfur

d)

iron sulfide

48.

when something burns, it reacts with the .... in the air

a)

CO2

b)

CO

c)

C

d)

O2

49.

how can iron be protected?

a)

by painting it

b)

by drowning it

c)

by blowing it

d)

by throwing it

50.
Magnetic lines of force point
a)
toward a north magnetic pole. 
b)
toward a south magnetic pole. 
c)
toward the magnetic South Pole.
d)
in the opposite direction that a compass points. 
51.

What is this measuring instrument called?

a)

Bunsen Burner

b)

Pipette

c)

Measuring Cylinder

d)

Beaker

52.
The rabbit in this food web would be considered a:
a)
Decomposer
b)
Producer
c)
Secondary Consumer
d)
Primary Consumer
53.

Look carefully at the image. Which organism is tertiary consumer?

a)
Wolf
b)

bird

c)

lizard

d)

grasshopper

54.
What are the organisms that break down dead stuff?
a)
Producers
b)
Consumers
c)
Decomposers
d)
Organisms
55.

There are 5 units of pesticide in the leaves, if the beetle eats 5 leaves, how many units of pesticides inside the beetle?

a)

10 units

b)

30 units

c)

25 units

d)

50 units

56.

A new fish that also eats plants is introduced into a pond. What changes would occur to this pond ecosystem?

a)

The large fish population will decrease.

b)

The plant population will decrease.

c)

The small fish population will increase.

d)

The new fish population will decrease.

57.

The number of chemicals inside each living thing is

corn (4 units)

mouse (12 units)

If the number of chemicals inside the snake is 72 units, how many mouse that the snake eats?

a)

4

b)

6

c)

7

d)

5

58.

Which of the following animals are herbivores?

I Goat

II Bear  

III Lion  

IV Squirrel  

a)

I and II

b)

I and IV

c)

II and III

d)

III and IV

59.

The diagram shows part of an aquatic food web for a stable lake ecosystem in Connecticut. What is the source of energy for the algae?

a)

waves

b)

sunlight

c)

bacteria

d)

rotifers, water fleas and tadpoles

60.

Given that the bear pictured eat many types of food including meats and plants, he is an example of an ______________________.

a)

producer

b)

Omnivore

c)

Herbivore

61.

Suppose that a new predator of the rabbit migrated to this ecosystem. What is the most likely initial effect on the other organisms?

a)

More competition among the mice for food

b)

More competition among the hawks for food

c)

Less competition among snakes for food

d)

Less grass available for food

62.

The diagrams show two divers swimming in the sea and two divers swimming in fresh water. Sea water is more dense than fresh water.

On which diver is there the greatest pressure?

a)

A

b)

B

c)

C

d)

D

63.

When you increase your depth under water, the water pressure on your body

a)

increases

b)

decreases

c)

stays the same

64.

What is the correct equation to calculate pressure?

a)

pressure = force × area

b)

pressure = force  ÷\div   area

c)

Force = pressure × area

d)

pressure = mass × area

65.

The pressure inside the syringe will decrease if we move the plunger in:

a)

Direction A

b)

Direction B

c)

We don't have to move the plunger as the pressure will change on its own.

d)

None of the above answers.

66.

What is pressure?

a)

Force exerted on a surface per unit area

b)

force exerted on a surface per unit mass

c)

speed exerted on a surface per unit area

d)

gravity exerted on a surface per unit area

67.

Why is it not a good idea to fill up your plate with only 1 kind of food?

a)

Having variety of food shows that the meal contans a variety of nutrients.

b)

Food that are the same are unhealthy.

c)

Your plate looks better with different kinds of food.

68.

To have a Balanced diet, your plate should have fruits, grains, vegetables and proteins.

a)

TRUE

b)

FALSE

69.

What group do these foods belong to?

a)

Sugars and Fat

b)

Dairy

c)

Carbohydrates

d)

Proteins

70.
Tube that carries oxygen from the mouth to the Bronchi. (#5)
a)
Bronchioles
b)
Alveoli
c)
Esophagus
d)
Trachea
71.

The lung is in letter ....

a)

a

b)

b

c)

c

d)

d

e)

e

72.

The respiratory organ in the picture is called ....

a)

lung

b)

trachea

c)

bronchioles

d)

bronchi

73.

NUMBER 6 is

a)

Lungs

b)

Trachea

c)

Mouth

d)

Alveoli

74.
When you breathe, your lungs take in ___ and remove ___. 
a)
air/oxygen
b)
oxygen/carbon dioxide 
c)
carbon dioxide/waste 
d)
waste/air 
75.

The diaphragm is in letter ....

a)

a

b)

b

c)

c

d)

d

e)

e

76.

NUMBER 1 is

a)

Lungs

b)

Pharynx

c)

Mouth

d)

Alveoli

77.

Which energy resource must a human cell absorb from food in order to carry out cellular respiration?

a)

carbon dioxide

b)

glucose

c)

protein

d)

water

78.

Which combination of foods best provides a healthy and nutritious meal?

a)

steak, fries, orange juice, banana

b)

baked potato, chicken nuggets, fruits, and orange juice

c)

apple, grilled chicken sandwich, orange juice, and yogurt

d)

macaroni and cheese, orange juice, ice cream, and pound cake

79.

Which nutrients are most essential for the survival of plants?

a)

water and sugar

b)

sugar and oxygen

c)

carbon dioxide and water

d)

oxygen and carbon dioxide

80.

Which best describes the process of photosynthesis?

a)

Carbon dioxide and oxygen are converted into glucose and water.

b)

Carbon dioxide and water are converted into glucose and oxygen.

c)

Oxygen and glucose are converted into carbon dioxide and water.

d)

Oxygen and water are converted into carbon dioxide and glucose.

81.

How many hours of sleep is recommended each night?

a)

5

b)

6

c)

7

d)

8

82.

Which TWO of the following subatomic particles are inside the nucleus?

a)

protons

b)

electrons

c)

neutrons

d)

There are no subatomic particles in the nucleus of an atom.

83.

How many neutrons are in Phosphorus?

a)

16

b)

15

c)

31

d)

46

84.

In this atomic model, point A represents -

a)

a proton

b)

a nucleus

c)

a neutron

d)

an electron

85.

In this atomic model, point D represents -

a)

a proton

b)

a nucleus

c)

a neutron

d)

an electron

86.

Which of the following best describes an electron?

a)

it has a positive charge smaller than a proton

b)

it has no charge smaller than a proton

c)

it has a negative charge smaller than a proton

d)

it has a negative charge same size as proton

87.
An element with a mass number of 11 and an atomic number of 5 has how many neutrons?
a)
11
b)
5
c)
6
d)
16
88.

In this atomic model, point C represents -

a)

a proton

b)

a nucleus

c)

a neutron

d)

an electron

89.

In this atomic model, point B represents -

a)

a proton

b)

a nucleus

c)

a neutron

d)

an electron

90.

What is the charge on a proton?

a)

+1

b)

-1

c)

0

91.

What is the charge on a neutron?

a)

+1

b)

-1

c)

0

92.

How many electrons does sulfur have

a)

16

b)

32

c)

48

d)

12

93.

What is the atomic number of this atom?

a)

1

b)

3

c)

4

d)

7

94.

N (Nitrogen) is an example of a(n)

a)

compound

b)

element

c)

mixture

d)

photon

95.

Two or more different types of atoms that are chemically combined in a fixed amount.

a)

compound

b)

element

c)

mixture

d)

photon

96.

4. Soda water is formed by mixing carbon dioxide (CO2) with distilled water (H2O). Classify the two substances based on the information provided.

a)

Soda water and distilled water are both heterogeneous mixtures.

b)

Soda water is a homogeneous mixture and distilled water is a pure substance.

c)

Soda water is a pure substance while distilled water is a homogeneous mixture.

d)

Soda water and distilled water contain hydrogen and oxygen, therefore they are both pure substances.

97.

Grape juice is an example of a solution in nature. What is the solvent in grape juice?

a)

Grapes

b)

Water

c)

Sugar

d)

Salt

98.

Which of the following is NOT a mixture?

a)

milk

b)

lemonade

c)

vegetable salad

d)

carbon

99.

OH is an example of a(n)

a)

compound

b)

element

c)

mixture

d)

photon

100.

The picture above shows several different compound models. What is true of compounds?

a)

Compounds are made of only one chemical element.

b)

Compounds are made of two or more different chemical elements.

c)

Compounds always contain at least hydrogen.

d)

Compounds must have at least three atoms that are chemically bonded.

101.

Use the image below to answer the following question.

Based on the pH scale, which substance is more acidic than tomato juice?

a)

Lemon juice has a lower pH therefore it is more acidic than tomato juice.

b)

Baking soda has a lower pH therefore it is more acidic than tomato juice.

c)

Black coffee has a greater pH therefore it is more acidic than tomato juice.

d)

Milk has a pH closest to neutral therefore it is more acidic than tomato juice.

102.

Ink can be separated by a method of -----------------------------------------------

a)

distillation

b)

filtration

c)

chromatography

d)

sedimentation

103.

The liquid that the solute will be dissolved into is the…

a)

solute

b)

soluble

c)

insoluble

d)

solvent

e)

saturated

104.

If potassium reacts with water what are the 2 products of the reaction?

a)

potassium hydroxide + oxygen

b)

potassium hydroxide + hydrogen

c)

potassium + hydrogen oxide

d)

Potassium hydroxide + hydrogen oxide

105.

........... is the hardest known substance in nature

a)

Graphite

b)

Iron

c)

Gold

d)

Diamond

106.
What metal hydroxide is produced when magnesium reacts with water?
a)
Copper hydroxide
b)
Magnesium oxide
c)
Magnesium
d)
Magnesium hydroxide
107.

What are the products formed when lead + nitric acid react?

a)

magnesium chloride and water

b)

lead nitrate and hydrogen gas

c)

lead nitrate and water

d)

zinc ethanoate and hydrogen gas

108.

What does "malleable" mean?

a)

Can be made into a shape.

b)

Easily break

c)

Can be pulled into wire

d)

Shiny

109.

What are the products formed when copper oxide + hydrochloric acid react?

a)

copper chloride and water

b)

copper chloride and hydrogen gas

c)

sodium ethanoate and water

d)

aluminium oxide and water

110.

Sulphur reacts with oxygen to form ........................

a)

Sulphur nitrate

b)

Sulphur dioxide

c)

Sulphate

d)

Sulphide

111.

If the metal filling is zinc, what is the end product of reaction

a)

zinc metal

b)

zinc oxide

c)

zinc carbonate

d)

zinc manganate

112.

Which element is between Aluminium and Zinc on the reactivity series?

a)

Copper

b)

Lead

c)

Potassium

d)

Carbon

113.

metal+oxygen=

a)

acid

b)

alkali

c)

metal oxide

d)

hydrogen

114.

Calculate the average speed (in meter/sec) if a cheetah runs 180 meters in 10 seconds.

a)

12 m/s

b)

170 m/s

c)

18 m/s

115.

What is happening at segment A?

a)

acceleration

b)

deceleration

c)

constant speed

d)

no motion/object at rest

116.

What is happening at segment B?

a)

no motion/object at rest

b)

constant speed

c)

acceleration

117.

The graph shows the speed of a car during a trip along the highway. What can you say, in general, about the speed of the car?

a)

It is constant during the trip

b)

It is moving at a slow rate of speed.

c)

It is increasing throughout the trip

d)

It varies at different times during the trip

118.

A snowboarder was in a competition. It took her 53 seconds to ride down a 75 meter hill. What was her average speed in meters per second?

a)

0.7 m/s

b)

53 m/s

c)

1.4 m/s

119.

What is happening at segment D?

a)

acceleration

b)

deceleration

c)

constant speed

d)

no motion/object at rest

120.

What is the person doing from 5 seconds to 10 seconds?

a)

Walking

b)

Running

c)

Standing Still

121.

John and Caroline go out for a drive one day. The graph represents the distance they traveled over time.


During what part of their drive were they not moving?

a)

From 0 to 0.75 hours

b)

From 1.25 to 2.0 hours

c)

From 0.75 to 1.25 hours

d)

They are moving the entire time.

122.

The formula for calculating speed is...(x means multiply; / means divide)

a)

time x distance

b)

distance x speed

c)

distance / time

d)

time / distance

123.
How many times does this object STOP moving?
a)
None
b)
Once
c)
Twice
d)
Three times
124.
Which runner won the race?
a)
A
b)
B
c)
C
125.

when the incident ray hits the mirror,what is the name of the ray that comes after that?

(a)  

126.

when light goes through a convex lens,the light bends

a)

TRUE

b)

FALSE

127.

how does light travel

a)

through a bulb

b)

by a car

c)

in a straight line

d)

in a thin curved line

128.

A pencil or a straw looks "broken" in a glass of water because of the law of?

a)

Refraction

b)

Reflection

c)

Conservation of mass

d)

Einstein's Law of Bendography

129.

Which figure shows the REFLECTION of light?

a)

Figure 1

b)

Figure 2

c)

Figure 3

d)

All of the above

130.

The diagram above shows a light ray as it strikes an object. Based on the way the light rays travel, the object in the diagram is MOST LIKELY —

a)

an eyeglass lens

b)

a mirror

131.

This diagram shows which law?

a)

Reflection

b)

Refraction

132.
According to the Law of reflection, a light ray striking a mirror
a)
continues moving through the mirror in the same direction
b)
moves into the mirror at a slightly different angle
c)
bounces off the mirror toward the direction it came from
d)
bounces off the mirror at the same angle it hits.
133.

In the illustration, the light ray striking the object is?

a)

refracted

b)

reflected

134.

Choose the correct answer.

a)

refraction

b)

reflection

135.

What is happening in this picture?

a)

Reflection

b)

Refraction

136.

Light allows us to see objects like this flower in a glass of water. What happens to light that causes the flower stem to look as if it is bending?

a)

Light bounces off the glass.

b)

Light changes direction in the water.

137.

Look at the objects above. All of them help people observe the world by —

a)

refracting light

b)

reflecting light

138.

The law of REFLECTION states that the angle of the incident light ray is always ________ to the angle of the reflected ray.

a)

Larger

b)

Smaller

c)

The same

d)

Absorbed

139.

What is the angle of the NORMAL line?

a)

180 degrees

b)

45 degrees

c)

98 degrees

d)

90 degrees or perpendicular to the surface

140.

What is the reason of splitting of white light?

a)

Change of speed of all colours

b)

Breaking down of colours

c)

Falling obliquely on the surface

d)

Falling on the normal of the surface

141.

Why the rainbow forms in the nature?

a)

Because of refraction

b)

Because of dispersion

c)

Because of reflection

d)

Because of colours

142.

What word describes the range of colours seen on the screen?

a)

refraction

b)

reflected

c)

separated

d)

spectrum

143.

If white light is shone past a green filter and a yellow filter, what coloured light emerges at the end?

a)

blue

b)

green

c)

yellow

d)

white

e)

no light

144.

When we combine the colours of the rainbow, we get ___________ light.

a)

indigo

b)

red

c)

violet

d)

white

145.

If white light is shone past a green filter and a blue filter, what coloured light emerges at the end?

a)

cyan

b)

magenta

c)

yellow

d)

white

e)

no light

146.

Blue light is scattered in all directions causing the sky looks blue during midday.

a)

True

b)

False

147.

The mass of the barrel is (a)   kg

(assume we are on Earth where 100g has a weight of 1N)

148.
What is the anticlockwise moment acting on this crane?
a)
80,000Nm
b)
100,000Nm
c)
120,000Nm
d)
140,000Nm
149.

Two masses of mass 10.0 and 6.0 kg are hung from massless strings at the end of a light rod. The rod is virtually weightless. A pivot (fulcrum) is placed off center and the system is free to rotate. If the 6.0 kg mass is 4.0 m away from the pivot, how far away is the 10.0 kg mass if the system is not rotating?

a)

0.42 m

b)

2.4 m

c)

4.8 m

d)

4.2 m

150.

Calculate the moment of a chair with a force of 30N and a distance of 5 m from the pivot

a)

6 Nm

b)

150 Nm

c)

35 Nm

151.

Which of these statements is incorrect

a)

The higher the volume the lower the gas pressure

b)

The higher the temperature the higher the gas pressure

c)

The higher the volume the higher the gas pressure

152.

Which is the equation for calculating moments?

a)

Moment = Force x Distance moved

b)

Moment = Mass x Perpendicular Distance to pivot

c)

Moment = Force x Perpendicular Distance to pivot

d)

Moment = Force x Distance to pivot

153.

Assuming the system is in equilibrium, calculate the missing distance d

a)

3.4 m

b)

2.8 m

c)

4.4 m

d)

1.6 m

154.

Tension is the force that ______________ an object

a)

Compress or stretch

b)

Stretch or pull

c)

Squash

155.

Walking is an example of which type of friction?

a)

fluid

b)

rolling

c)

static

d)

sliding

156.

What force slows down moving things?

a)

Position

b)

Friction

c)

Magnetism

d)

Sliding

157.

Which of the following produces least friction?

a)

(a) Sliding friction

b)

(b) Rolling friction

c)

(c) Composite friction

d)

(d) Static friction

158.

What type of friction will you see when air or liquid slows an objects movement?

a)

Rolling

b)

Fluid

c)

Static

d)

Sliding

159.

Friction due to fluids is called

a)

(a) force

b)

(b) pressure

c)

(c) friction

d)

(d) drag

160.

Rough surfaces have _________ compared to smoother surfaces.

a)

greater friction

b)

less friction

c)

the same level of friction

161.

Force of friction depends on

a)

(a) roughness of surface

b)

(b) smoothness of surface

c)

(c) inclination of surface

d)

(d) all of these

162.

Which of the following is not a smooth surface?

a)

(a) Surface of wet soap

b)

(b) Surface of tyres

c)

(c) Glazed tiles

d)

(d) Surface of mirror

163.

The diagram represents a person using a spring scale to pull a wooden block up a ramp.The plastic straws were placed under the wooden block to

a)

decrease the mass of the block

b)

decrease the amount of friction

c)

increase the surface area of the ramp

d)

increase the gravitational attraction of the block

164.

A push or a pull is the definition of a _______.

a)

speed

b)

direction

c)

movement

d)

force

165.

These forces are...

a)

Balanced

b)

Unbalanced

166.

A balanced force causes an object to...

a)

Stay in place

b)

Accelerate in speed

c)

Decelerate in speed

d)

Move in a constant speed

167.

Balanced or Unbalanced: A car accelerating around a mountain curve.

a)

balanced

b)

unbalanced

168.
What is the net force?
a)
30 N left
b)
25 N right
c)
5 N left
d)
55 N right
169.

The net force is...

a)

-20 N

b)

0 N

c)

80 N

d)

20 N

170.
On the Picture the balloon pushes the air right. What is the second force in this interaction pair?
a)
The air pulls the ball left
b)
Gravity pulls the balloon down
c)
The air pushes the balloon left.
d)
The air pulls the balloon right.
171.
How will this object move? 
a)
It won't move. 
b)
It will move to the right. 
c)
It will move to the left. 
d)
It will move in both directions. 
172.

What is true about this picture?

a)

the forces are balanced

b)

the net force is 10N

c)

The net force is 3 N

d)

The net force is 7N

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