AnswersFL-2003310-Physical Science CRCumulative Exam

Cumulative Exam — Cumulative exam Answers

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On a test, Helena is defining energy. Which must she include in order to get her answer marked correct?

A
making objects more compact
B
the ability to do work
C
carrying through matter and space
D
the bonds of atoms
2
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Which term refers to the ability to do work?

A
energy
B
power
C
force
D
motion
3

The diagram shows a toy car on a number line.

Question illustration
A
–4
B
1
C
2
D
4
4

Which types of electromagnetic waves have frequencies that are higher than those of ultraviolet light but lower than those of gamma rays?

A
microwaves
B
X-rays
C
infrared light
D
radio waves
5

Which best describes a difference between electric current and static electricity?

A
Electric current is continuous, and static electricity is not continuous.
B
Static electricity is continuous, and electric current is not continuous.
C
Electric current involves the movement of electrons, and static electricity involves the movement of protons.
D
Static electricity involves the movement of electrons, and electric current involves the movement of protons.
6

Pravat exerts a force of 30 N to lift a bag of groceries 0.5 m. How much work did Pravat do on the bag?Note : Work = Force x Distance

A
0 J
B
15 J
C
30 J
D
60 J
7

Which wave is carrying the most energy?

A
A wave with large amplitude.
Option A
B
A wave with very large amplitude.
Option B
C
A wave with small amplitude.
Option C
D
A wave with medium amplitude.
Option D
8

Which two forces act directly on objects that are unable to be viewed by the unaided eye?

A
electromagnetic and strong
B
gravitational and electromagnetic
C
strong and weak
D
weak and gravitational
9

Which sound is most likely the most intense?

A
a whisper
B
a rock concert
C
normal speech
D
the sound of rain
10

Which is the best example of the law of conservation of energy?

A
A basketball stops bouncing because its energy disappears.
B
A rolling skateboard slows down because some of its kinetic energy changes to heat.
C
A falling book hits the ground and all of its energy is destroyed.
D
A toy car gains speed as it moves down a ramp because the ramp creates energy.
11

Why do nuclear power plants use fission instead of fusion?

A
Scientists have not yet gotten a fusion reaction to happen on Earth.
B
Per gram of fuel, fission releases more energy than fusion.
C
The energy from fusion cannot yet be converted to electricity.
D
Fusion requires conditions that use too much energy to maintain.
12

Farah is doing an experiment that involves calculating the speed of a longitudinal wave. What will most likely happen if she increases the temperature in the room?

A
The amplitude of the wave will increase.
B
The amplitude of the wave will decrease.
C
The speed of the wave will increase.
D
The speed of the wave will decrease.
13

Brian creates the diagram below to organize his notes on nuclear fission and fusion.

Question illustration
A
produces neutrons
B
forms heavier atoms
C
joins two nuclei
D
forms lighter nuclei
14

What is the kinetic energy of a toy truck with a mass of 0.75 kg and a velocity of 4 m/s? (Formula: )

Question illustration
A
3 J
B
6 J
C
12 J
D
24 J
15

Briana builds a circuit that has a resistance of 8.0 . What voltage should she apply to have a current of 0.8 A?

Question illustration
A
0.10 V
B
6.4 V
C
7.2 V
D
10 V
16

Carla draws two circuit diagrams that connect the same components in different ways, as shown.

Question illustration
A
The total resistance in Circuit A is greater than that in Circuit B.
B
When a bulb in Circuit A goes out, the other bulbs keep shining.
C
The bulbs in Circuit A shine brighter than those in Circuit B.
D
When a bulb in Circuit B goes out, the other bulbs go out.
17

Marcus plucks at an outstretched coil and observes the following wave motion. What is the motion of the particles in this kind of wave?

Question illustration
A
The particles will move up and down over large areas.
B
The particles will move up and down over small areas.
C
The particles will move side to side over small areas.
D
The particles will move side to side over large areas.
18

Which object reflects light with the longest wavelength?

A
a yellow book
B
a violet flower
C
a blue paper
D
a green leaf
19

What is the potential energy of a 25 kg bicycle resting at the top of a hill 3 m high? (Formula: PE = mgh)

A
75 J
B
735 J
C
245 J
D
37.8 J
20

Which is an example of negative acceleration?

A
a snowboarder who increases speed when traveling downhill
B
a biker who maintains a constant speed through a race
C
a skateboarder who reduces speed when moving up a hill
D
a runner who fluctuates speed by increasing and decreasing speed

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