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Midterm Practice

Total questions: 109

Worksheet time: 1hrs 18mins

Name
Class
Date
1.

McDonald's keeps my Big Macs warm under a heat lamp which transfers heat through

a)

conduction

b)

convection

c)

radiation

d)

science stuff

2.

How does heat transfer when you hold an ice cube in your hand?

a)

from the cold ice cube to your warm hand

b)

the cold ice cube makes your hand cold

c)

from your warm hand to the cold ice cube

d)

very carefully

3.

Smoke rises at a campfire because

a)

the heated gas is less dense

b)

the heated gas is more dense

c)

the heated gas conducts heat to space

d)

smoke follows beauty

4.

A lava lamp has cool globs of stuff that float up and down because of what?

a)

conduction

b)

convection

c)

radiation

d)

coolness

5.

When I drink coffee in the morning, I warm my hands on the mug by what type of heat transfer?

a)

conduction

b)

convection

c)

radiation

d)

coziness

6.

Energy that transfers from one substance to another until the temperatures are equal is called...

a)

Joe

b)

temperature

c)

MELTS

d)

heat

7.

Heat transfer is really neat. It always moves from..

a)

hot to cold

b)

cold to hot

c)

big to little

d)

stop singing

8.

Which type of heat transfer occurs as heat moves in a circular motion in a liquid or gas?

a)

conduction

b)

convection

c)

radiation

d)

cooking

9.

What are the units of energy?

a)

Newton

b)

Celsius

c)

Joule

d)

Ampere

10.

If a block of metal at 10 degrees Celsius is placed next to a block of metal at 40 degrees Celsius on a table that is in a room at room temperature, which of the following is likely to happen?

a)

The cooler block will become cooler

b)

The hotter block will become hotter

c)

Each block will stay at its original temperature

d)

The hot block will cool and the cool block will become hotter

11-20.

Answer the questions below after watching the video

11.

What is the main purpose of the experiment demonstrated in the video?

a)

To compare the density of wood, metal, and plastic

b)

To understand the boiling point of water

c)

To learn how different materials conduct heat

d)

To test the melting point of butter

12.

What materials are used for the spoons in the experiment?

a)

Copper, Aluminum, and Steel

b)

Wood, Glass, and Metal

c)

Wood, Metal, and Plastic

d)

Plastic, Glass, and Copper

13.

What is placed on top of each spoon in the experiment?

a)

A small rock

b)

A piece of ice

c)

A pat of butter

d)

A sugar cube

14.

What was the purpose of using butter in the experiment?

a)

To add flavor to the experiment

b)

To make the spoons slippery

c)

To prevent the spoons from rusting

d)

As a marker to observe heat conduction

15.

What is the significance of the experiment's setup?

a)

To illustrate how heat conduction varies among materials

b)

To compare the boiling points of different substances

c)

To demonstrate the properties of water

d)

To show the melting point of different materials

16.

What is the final step before observing the results in the experiment?

a)

Placing the setup under sunlight

b)

Heating the spoons directly

c)

Pouring hot boiling water into the bowl

d)

Freezing the setup overnight

17.

Why did the bead move down the spoon made of metal?

a)

Due to the magnetic properties of metal

b)

Because metal conducts heat better

c)

Because metal has a higher density

d)

Because of the gravitational pull

18.

Why did the bead not move on the spoons made of wood and plastic?

a)

Because they are waterproof

b)

Due to their non-conductive nature

c)

Because they are lighter than metal

d)

Because they absorb heat

19.

What does the experiment demonstrate about heat conduction?

a)

Only metals can conduct heat

b)

All materials conduct heat at the same rate

c)

Heat conduction is not affected by material

d)

Different materials conduct heat differently

20.

How can viewers further explore the concept demonstrated in the video?

a)

By conducting the experiment with different liquids

b)

By visiting the cool science experiments headquarters website

c)

By reading a physics textbook

d)

By visiting a science museum

21.
What are waves that can transfer heat through the vacuum of empty space?
a)
Electromagnetic waves
b)
Convection
c)
Conduction
d)
Heat
22.
What is the transfer of heat by direct contact?
a)
Convection
b)
Electromagnetic waves
c)
Radiation
d)
Conduction
23.

What is the measurement of the average kinetic energy of a substance?

a)

Kinetic energy

b)

Temperature

c)

Potential energy

24.
What is the transfer of kinetic energy from one substance to another?
a)
Heat
b)
Energy
c)
Thermal energy
d)
Temperature
25.
What kind of heat transfer?
a)
convection
b)
conduction
c)
radiation
26.

What kind of heat transfer?

a)

conduction

b)

radiation

c)

convection

27.
What kind of heat transfer?
a)
conduction
b)
convection
c)
radiation
28.
What kind of heat transfer?
a)
conduction
b)
convection
c)
radiation
29.
What kind of heat transfer?
a)
conduction
b)
convection
c)
radiation
30.
What kind of heat transfer?
a)
conduction
b)
convection
c)
radiation
31.
What kind of heat transfer?
a)
conduction
b)
convection
c)
radiation
32.

A spoon in a cup of hot soup becomes warmer

a)

Convection

b)

Conduction

c)

Radiation

33.

Hot water rises and cold water sinks. Is this:

a)

Convection

b)

Conduction

c)

Radiation

34.
What happens when ice cubes melt in a glass?
a)
Heat travels from the ice to the warmer water.
b)
No energy is transferred.
c)
Heat is transferred from the warmer water to the ice cubes.
35.

In heat transfer, heat always flows from the _?_ substance to the _?_ substance.

a)

hotter to colder

b)

colder to hotter

c)

hotter to hotter

d)

colder to colder

36.
A toaster toasting bread is an example of 
a)
condensation
b)
conductio
c)
convection
d)
radiation
37.
Which direction will the heat flow while this person holds a hot cup of tea?
a)
from the cup to her hand
b)
from her hand to the cup
c)
no heat is transferred
38.
The warm air from this heater creates a current when the warm air rises and the cold air sinks.
a)
conduction
b)
convection
c)
radiation
39.

What are simple machines?

a)

Machines that are used in combination to create anything

b)

Machines with few or no moving parts that make work easier

c)

Complex machines that are difficult to understand

d)

Machines that are used to create wonders of the world

40.
Which of the following is NOT considered a force?
a)
push
b)
pull
c)
up
41.
Which simple machine is shown in the picture?
a)
lever
b)
inclined plane
c)
pulley
42.
This simple machine helps raise or lower an object. An example of this simple machine would be a flagpole.
a)
pulley
b)
inclined plane
c)
wedge
43.
The measure of speed in a set direction is what?
a)
motion
b)
gravity
c)
velocity
44.
This simple machine is made up on a slanted surface on one end of the machine. An example would be a ramp.
a)
pulley
b)
inclined plane
c)
screw
45.
You are helping a friend push a box on the ground. You notice it's much more difficult to push when the box is on carpet instead of the hardwood floor. This can be explained using which science term?
a)
Force
b)
Gravity
c)
Friction
46.
Which of the following is NOT considered a force?
a)
push
b)
pull
c)
up
47.
This simple machine helps cut or split objects apart. An example of this simple machine would be an axe.
a)
screw
b)
pulley
c)
wedge
48.
This simple machine helps raise or lower an object. An example of this simple machine would be a flagpole.
a)
pulley
b)
inclined plane
c)
wedge
49.
Which simple machine is shown in the picture?
a)
lever
b)
inclined plane
c)
pulley
50.
A pull is when you are using force to do what?
a)
Move an object closer to you
b)
Move an object away from you
c)
Move an object above you
51.
The measure of speed in a set direction is what?
a)
motion
b)
gravity
c)
velocity
52.
What is the definition of motion?
a)
The distance an object travels in a set amount of time.
b)
A change in an objects position as it moves.
c)
Where the object is located.
53.
It's cold outside so you rub your hands together to stay warm. Your hands are becoming warm is an example of ?
a)
motion
b)
gravity
c)
friction
54.
Which simple machine is shown?
a)
pulley
b)
inclined plane
c)
screw
55.
If you drop something, it hits the ground because of what?
a)
matter
b)
gravity
c)
motion
56.
You hear the tires on a vehicle make a screeching sound. This sound is a result of what?
a)
gravity
b)
friction
c)
pulling
57.
How do simple machines rely on force?
a)
Simple machines help decrease the amount of force required when moving an object.
b)
Simple machines pull objects toward each other.
c)
Simple machines only help people pull objects.
58.
You and your friend are having a contest to see which person can throw the basketball the farthest distance. You win, which means you used _______ force.
a)
less
b)
greater
c)
the same
59.

Alexandra was preparing to go on a hike in the woods. She gathered the equipment she would need and placed it on the kitchen counter. By chance, she placed her compass near an electrical outlet. Although the compass was not moving, the compass needle turned because ______________.

a)

the electric current in the outlet produced a magnetic field

b)

the compass could only be used outdoors

c)

the kitchen counter was made of a magnetic substance

d)

the kitchen had a microwave oven

60.

According to the diagram, which pair could both be north poles?

a)

A and B

b)

B and C

c)

A and C

d)

C and D

61.

The ______ are regions where the magnetic force exerted by a magnet is strongest.

a)

magnetic field lines

b)

anodes

c)

magnetic poles

d)

cathodes

62.

This structure produces power for use in the home by converting

a)

chemical energy into mechanical energy.

b)

electrical energy into mechanical energy.

c)

chemical energy into electrical energy.

d)

mechanical energy into electrical energy.

63.

The diagram shows an electric motor and a generator. Which two areas of physical science are closely related to the development of these devices?

a)

sound and light

b)

light and magnetism

c)

electricity and sound

d)

electricity and magnetism

64.

Scientists believe that magnetism is caused by the spin of certain atomic particles called

a)

electrons

b)

protons

c)

neutrons

d)

nuclei

65.

Which of the following is found in all magnets?

a)

a geographic pole

b)

a transformer

c)

a north pole and a south pole

d)

an electric field

66.

A magnet will not attract all metal objects. Which material below will a magnet NOT attract?

a)

Iron

b)

Aluminum Foil

c)

Cobalt

d)

Nickel

67.

Which pair of magnets would result from cutting this magnet in half?

a)

A

b)

B

c)

C

d)

D

68.

Which of the following best describes an electromagnet?

a)

permanent magnet

b)

insensitive to electric currents

c)

unchanging magnetic properties

d)

temporary magnet

69.

Hamed wanted to find out how to make an electromagnet stronger. The results of his experiment are listed in the table above. According to these data, which of the following does NOT make an electromagnet stronger?

a)

increasing the number of batteries that are connected

b)

increasing the number of wire turns around the core

c)

increasing the number of nails inside the core

d)

increasing the number of tacks used

70.

A galvanometer is an instrument used to detect small amounts of electric current.The current detected is most likely measured in

a)

milliliters

b)

milligrams

c)

milliamperes

d)

milliseconds

71.

Which of the following devices produces electric current?

a)

generator

b)

stereo speaker

c)

galvanometer

d)

electric motor

72.

The magnetic field that surrounds a magnet exerts _______.

a)

electric current

b)

the magnetic force

c)

air pressure

d)

resistance

73.

North poles of magnets always attract ________.

a)

south poles

b)

other north poles

c)

negative charges

d)

positive charges

74.

The picture shows an experiment used to determine the effect of using more nails in the core of an electromagnet.Which of the following would make this a better-designed experiment?

a)

using a different number of batteries for each electromagnet

b)

using the same number of turns of wire for each electromagnet

c)

inserting an ammeter in each circuit between the battery and the nails

d)

using a different size battery for each electromagnet

75.

Groups of atoms with aligned magnetic poles are called _______.

a)

magnetic domains

b)

magnetic fields

c)

elements

d)

permanent magnets

76.

Electric current passing though a wire produces ________.

a)

a magnetic field around the wire

b)

a permanent magnet

c)

geographic poles

d)

a compass

77.

What effect does increasing the current in the wire have on an electromagnet?

a)

It decreases the strength of the magnetic field.

b)

It increases the strength of the magnetic field.

c)

It has no effect on the electromagnet.

d)

It causes it to become a permanent magnet.

78.

Which of the following changes electrical energy into mechanical energy?

a)

generator

b)

electric motor

c)

transformer

d)

superconductor

79.

In order for the electromagnetic coil in the motor to keep turning, the current must ________.

a)

continue in one direction

b)

periodically increase in strength

c)

change direction

d)

be through an ammeter

80.

The diagram above shows the magnetic field surrounding a bar magnet. The closer together the lines of force, the stronger the magnetic field. According to the diagram,where is the magnetic field strongest?

a)

around the north pole

b)

around the south pole

c)

around both poles

d)

in the center of the magnet

81.

Which of the following is a form of electromagnetic induction?

a)

producing electric current by moving a magnet through a wire loop

b)

using an electromagnet to measure electric current

c)

producing mechanical energy by sending electric current through an electromagnet

d)

changing electrical energy to mechanical energy that produces sound

82.

Sandra is trying to identify an unknown substance. She determines by testing that it has a density of 7.5 g/cm^3 and can be picked up by a magnet. She concludes that the matter is

a)

wood

b)

iron

c)

calcium

d)

plastic

83.

Which of the following devices can increase or decrease the voltage of an alternating current?

a)

generator

b)

transformer

c)

battery

d)

galvanometer

84.

Which fossil fuel is the cleanest burning?

a)

Coal

b)

Oil

c)

Natural Gas

85.

Which of the following is a renewable source of energy?

a)

Nuclear

b)

Biomass

c)

Coal

86.

What is one of the advantages of using coal

as an energy source in the United States?

a)

Forming acid rain

b)

Producing carbon dioxide gas

c)

It is renewable

d)

It is cheap

87.

What is one disadvantage of producing hydroelectric power?

a)

Dams have environmental impacts

b)

Less energy production on cloudy days

c)

Air pollution

d)

It is a reliable source of energy

88.

What is one advantage of geothermal energy?

a)

Only available in certain locations

b)

No air pollution is produced

c)

Wind is inconsistent

d)

Mining destroys land

89.

This type of energy is harnessed as moving air turns the blades of a turbine.

a)

Wind

b)

Solar

c)

Nuclear

d)

Oil

90.

Which of the following is a nonrenewable energy resource?

a)

Geothermal

b)

Hydroelectric

c)

Biomass

d)

Oil

91.

Solid fossilized carbon that is burned to produce heat and electricity.

a)

Oil

b)

Coal

c)

Uranium

d)

Plutonium

92.

Thick black liquid hydrocarbon that is extracted through drilling.

Causes great environmental damage when spilled.

a)

Coal

b)

Oil

c)

Natural Gas

d)

Uranium

93.

Energy generated by splitting large atoms of uranium or plutonium apart.

a)

Nuclear

b)

Geothermal

c)

Hydroelectric

d)

Solar

94.

What is one advantage of generating electricity at nuclear power plants?

a)

Low air pollution.

b)

No raw materials needed.

c)

Power plants are expensive to build.

d)

Uranium mining contaminates the environment.

95.

This process uses a high pressure water mixture to break up rock far below the earth's surface to allow more oil and natural gas to be collected.

a)

Pumping

b)

Brixing

c)

Fracking

d)

Dynamiting

96.

This method of generating electricity is reliable and quiet and requires very little maintenance. However, electricity cannot be generated at night.

a)

Solar

b)

Geothermal

c)

Hydroelectric

d)

Biomass

97.

Which type of renewable energy uses heat from deep within the earth?

a)

Wind

b)

Solar

c)

Geothermal

d)

Biomass

98.

This type of renewable energy is produced when flowing water turns the blades of a turbine, which in turn powers an electrical generator.

a)

Wind

b)

Solar

c)

Geothermal

d)

Hydroelectric

99.

What Law states the relationship between mass, force, and acceleration?

a)

Newtons 1st Law of Motion

b)

Newtons 2nd Law of Motion

c)

Newtons 3rd Law of Motion

d)

Newtons 4th Law of Motion

100.

What is the measurement of a mass in motion?

a)

Momentum

b)

Impulse

c)

Reshaping

d)

Friction

101.

True or False: The equation of momentum is P=M/V

a)

True

b)

False

102.

When an object is at rest what is at 0?

a)

Velocity

b)

Momentum

c)

Impulse

d)

Friction

103.

A  ________ mass produces a large amount of momentum with a small amount of velocity.

a)

Large

b)

Small

c)

Medium

104.

A _______ amount of velocity produces momentum even with a small amount of mass.

a)

Small

b)

Large

c)

Medium

105.

No velocity produces no ____________ regardless of the mass.

a)

Velocity

b)

Impulse

c)

Momentum

106.

What is measured in newton seconds?

a)

Momentum

b)

Velocity

c)

Impulse

d)

Friction

107.

True or False: the law of conservation of momentum states that momentum can be created and destroyed depending on the situation.

a)

True

b)

False

108.

What type of collision is where both momentum and kinetic energy are preserved?

a)

Inelastic collision

b)

Elastic Collision

c)

Collision

109.

What type of collision is where there is a loss of kinetic energy but momentum is preserved?

a)

Elastic Collision

b)

Inelastic Collision

c)

Collision

110.

True or False: Thermal energy is the heat that is produced by friction between the objects involved in a collision.

a)

True

b)

False

111.

What is it called when one or more objects are reshaped due to a collision?

a)

Reforming

b)

Reshaping

c)

Remapping

112.

What energy produces a sound after a collision?

a)

Sound Energy

b)

Light Energy

c)

Electromagnetic Energy

113.

What energy produces electromagnetic waves during a collision?

a)

Sound Energy

b)

Light Energy

c)

Energy

114.

If I measure the time it takes for me to move an object, what am I measuring?

a)

Impulse

b)

Momentum

c)

Friction

d)

Force

115.

If I multiply the mass x the velocity, what am I trying to measure?

a)

Momentum

b)

Impulse

c)

Kinetic Energy

116.

What is the letter that represents momentum?

a)

P

b)

S

c)

M

d)

L

117.

What is the letter that represents impulse?

a)

J

b)

K

c)

L

d)

I

118.

What is measured in newtons?

a)

Force

b)

Impulse

c)

Momentum

d)

Mass

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