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9th grade mid-term

Total questions: 71

Worksheet time: 3hrs 49mins

Name
Class
Date
1.
What is the definition of CONDUCTION?
a)
When heat is transferred from objects like rays of light or electromagnetically.
b)
a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
c)
When heat transfers from objects that are touching.
d)
When heat transfers through the heater or AC in your house.
2.
What is the definition of CONVECTION
a)
When heat transfers through waves.
b)
When heat transfers from objects that are touching.
c)
a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
d)
Heat traveling from the sun
3.
What kind of heat transfer happens when the sun is heating your body?
a)
Conduction
b)
Radiation
c)
Convection
d)
Density
4.

Which of the following is an example of convection?

a)

Touching a hot pan.

b)

When the AC or heater changes the temperature.

c)

When a car engine turns hot after being turned on.

d)

When you are making soup and the water is rising and lowering.

5.
Warm air rises and the cool air sinks demonstrates this type of heat transfer. 
a)
conduction
b)
convection
c)
radiation
d)
Insolation 
6.
Heat transfers from an area of ____temperature to an area of ___ temperature.
a)
high to low
b)
low to high
c)
high to high
d)
It can travel high to low and low to high. 
7.
Warm air is __________ dense than cold air and rises creating convection currents.
a)
more
b)
less
8.
You get sunburned due to __________ from the sun.
a)
conduction
b)
convection
c)
radiation
9.
Which material is the best conductor of heat?
a)
Wood
b)
Plastic
c)
Glass
d)
Steel
10.
Which phase is the best conductor of heat?
a)
Solid
b)
Liquid
c)
Gas
11.
The heat from a lamp allows a lizard to remain warm. This is an example of which type of heat transfer?
a)
radiation
b)
conduction
c)
convection
d)
insulation
12.
The Gulf Stream is a current that brings warm ocean water from the south to the north.
a)
conduction
b)
convection
c)
radiation
13.
Walking on the warm sand sand with your bare feet.
a)
conduction
b)
convection
c)
radiation
14.
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
15.
Which direction will the heat flow while this ice cap melts?
a)
there is no heat transfer
b)
from the icecap to the water
c)
from the water to the icecap
16.
The chocolate bunny and the blow dryer.
a)
conduction
b)
convection
c)
radiation
17.
The chocolate bunny and the lamp.
a)
conduction
b)
convection
c)
radiation
18.
Poor conductors like wood and plastic are called:
a)
conductors
b)
insulators
c)
burners
19.

Transfer of thermal energy through "flow" of liquids and gases

a)

conduction

b)

convection

c)

radiation

20.
The baby chickens are kept warm from the heat lamps.
a)
conduction
b)
convection
c)
radiation
21.
What is a closed path for electrons to flow through?
a)
static electricity
b)
circuit
c)
amperes
22.
Lightning is an example of _________.
a)
static electricity
b)
current electricity
c)
watts
d)
voltage
23.
Identify the conductor below.
a)
cloth rag
b)
plastic bottle
c)
gold ring
24.
Identify the insulator below.
a)
aluminum foil
b)
paperclip
c)
rubber eraser
25.
Electricity is the flow of _________.
a)
protons
b)
neutrons
c)
electrons
26.
The best conductors for electricity are made of...
a)
wood
b)
plastic
c)
rubber
d)
metal
27.
What slows down the flow of electricity in a circuit?
a)
resistance
b)
voltage
c)
current
d)
source of electric current
28.
Which circuit (s) are parallel?
a)
A
b)
A and B
c)
B and C
d)
C
29.
Which one will still function if one light bulb goes out?
a)
A-Series
b)
B-Parallel
c)
A-Parallel
d)
B-Seriese
30.
If I add more light bulbs to a series circuit what happens?
a)
The current speeds up and the lights get brighter
b)
The current slows down and the lights dim lower
c)
The current speeds up and the lights dim lower
d)
The current slows down and the lights get brighter
31.
This circuit has more than one loop. When one light goes out, the others stay on. 
a)
closed circuit
b)
series circuit
c)
parallel circuit
d)
open circuit
32.
this circuit is .....?
a)
open
b)
parallel
c)
closed
d)
The cutest little circuit evah!
33.
What is a switch's function in a circuit?
a)
to make the current hotter or colder
b)
turn on and off the flow of current
c)
the pathway that current flows
d)
to add more power to the circuit
34.
Which best describes a simple series circuit?
a)
Electricity flows along one pathway.
b)
The flow of electricity comes from the switch.
c)
Electricity flows along many pathways.
d)
The flow of electricity comes from the light bulb.
35.

Which of the following is a conductor?

a)

glass

b)

rubber

c)

plastic

d)

copper

36.

Three of the following items are resistors/receivers. Which item does NOT belong?

a)

speaker

b)

battery

c)

motor

d)

light bulb

37.

In which of the following circuits will all of the remaining light bulbs go out if bulb 3 burns out?

a)
b)
c)
d)
38.

Which object does NOT conduct electricity?

a)

copper wire

b)

iron nail

c)

salt water

d)

wood

39.

Irene bought a new house and has decided to rewire it. She wants to be able to turn

some lights off and have the others remain lit. What type of circuits should she use and

why?

a)

She should use parallel circuits because when one light turns off, the other lights remain lit.

b)

She should use series circuits because when one light turns off, the other lights remain lit.

c)

She should use parallel circuits because when one light turns off, the others turn off, too.

d)

She should use series circuits because when one light turns off, the others turn off, too.

40.

Which of the following would be a good conductor of electricity?

a)

plastic

b)

rubber

c)

cotton

d)

iron

41.

When _______________ travels through a

conductor, a magnetic field is created

a)

current

b)

a magnetic field

c)

neutrons

42.

Electric currents produce _____________

a)

electron clouds

b)

magnetic fields

c)

sound waves

43.
What effect will the south pole of one magnet have on the south pole of another magnet?
a)
Repulsive
b)
Attractive
c)
Combative
d)
No effect
44.
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.
45.
What kind of magnet can be turned on and off?
a)
refridgerator magnet
b)
electromagnet
c)
magnetite
d)
iron
46.
Surrounding every magnet is a __________  __________.
a)
magnetic field
b)
electrical current
c)
another magnet
d)
an enemy
47.
In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.
a)
wire, iron, electric
b)
electric, wire, iron
c)
iron, electric, wire
d)
excited, hair, apple
48.
What is most likely to happen when the switch is closed?
a)
A magnetic field should be produced
b)
The nail will rust
c)
The battery will explode
d)
The wire will catch on fire
49.
What are the ends of a magnet called?
a)
East and west poles
b)
Left and Right ends
c)
North and South ends
d)
North and South poles
50.
A compass needle responds to a magnetic field, because the compass needle is a
a)
A. generator.
b)
B. motor.   
c)
C. magnet.
d)
D. transformer.
51.
__________ is stored energy. 
a)
Potential
b)
Kinetic
c)
None of the above 
d)
All of the above 
52.
The energy of motion. It is found in all moving objects. This is known as ____ .
a)
potential energy
b)
friction
c)
kinetic energy
d)
gravity
53.

What is the KE of a football which has a mass of 0.8 kg and is kicked at a velocity of 10m/s?

a)

80 J

b)

3.2 J

c)

160 J

d)

40 J

54.

What is the kinetic energy of a zorb and human with a total mass of 90Kg rolling at 10m/s?

a)

3,700J

b)

900J

c)

4,500J

d)

6,500J

55.

What is the kinetic energy of a 4kg shotput thrown with a velocity of 13m/s?

a)

676 J

b)

3.25 J

c)

17J

d)

338 J

56.

An explosion of gas from a Hawaiian volcano blows a rock into the sky. The rock has 2000J of kinetic energy. What was its mass if the rock had a velocity of 20m/s?

a)

200Kg

b)

20,000Kg

c)

10Kg

d)

200Kg

57.

You serve a volley ball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30m/s. How much kinetic energy does the ball have?

a)

1890 J

b)

3780 J

c)

945 J

d)

31.5 J

58.

A golf pro swings his driver which has a mass of 0.75Kg at a velocity of 60 m/s. Calculate the kinetic energy of the club.

a)

2700 J

b)

16.9 J

c)

1350 J

d)

45 J

59.

A rabbit with a mass of 3kg walks at a speed of 0.5m/s. Calculate its kinetic energy.

a)

0.5 J

b)

0.75 J

c)

0.255 J

d)

0.375 J

60.

An explosion of gas from a Hawaiian volcano blows a rock into the sky. The rock reaches 100 meters in height. It has a mass of 5 kg. How much potential energy does the rock have before it begins falling back to earth?

a)

500J

b)

50J

c)

4,900 J

d)

49.05J

61.
With all of his Batgear on, Batman has a mass of 90.7 kg. How much potential energy does he have if he's perched on top of a 1,575 m building? 
a)
142,852.5 J
b)
1,399,954.5 J
c)
0.058 J
d)
17.36 J
62.
A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
63.
Rockets are launched into space using jet propulsion where exhaust accelerates out from the rocket and the rocket accelerates in an opposite direction.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
64.
A picture is hanging on a wall and does not move.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
65.
A person not wearing a seatbelt flies through a car window when someone slams on the breaks because the person’s body wants to remain in continuous motion even when the car stops.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
66.

Pushing a child on a swing is easier than pushing an adult on the same swing

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

d)

None of them

67.
Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
68.
An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
69.
Two students are in a baseball game. The first student hits a ball very hard and it has a greater acceleration than the second student who bunts the ball lightly.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
70.
The swimmer moves her hand down and to the left and her body goes forward to the right.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
71.
A rocket is sent into space.  When the power dies out, the rocket will just keep floating and moving in space forever (unless an unbalanced force, such as a meteor, runs into it).
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them