When you are cold, rubbing your hands together quickly can warm them up. Why?

Mechanical energy is converted to thermal energy.

When circuit wires are connected to a battery, how should they be arranged?

One connected to positive end, and one connected to negative

A spoon will look bent in a glass of water because

light bends as it passes from water to air

What is the main difference between series and parallel circuits?

A series has one path, and a parallel has multiple paths

In a complete circuit, light bulbs will not light if

the path for the electric current to travel is incomplete

In a parallel circuit, Lisa has two switches down and one up. What will be the outcome?

Two bulbs will be lit, and one will be out.

When wind power turns a turbine, it transfers

mechanical energy that is converted into electrical energy

Which list contains only alternative energy resources?

solar, biofuel, wind, geothermal

How does light behave differently when it enters a prism?

The light ray bends as it strikes the glass

A pencil looks strange in a glass of water because the light

bends, causing the pencil to appear broken

Mechanical energy refers to

the energy of motion or position

An astronaut doesn't hear a sound when he throws a rock against another rock in space. Why?

There is no air on the moon, and the sound cannot travel.

Which best describes a parallel circuit?

Electricity flows along more than one pathway.

What should be done to make a complete circuit if you don't have a switch?

Connect the wires directly to the battery, one on each side.

When a bat searches for prey, it flies and uses echoes to find it. It is using-

mechanical energy and sound energy

Two students are using thermal energy with a test tube over a flame. The thermal energy is

heating the substance in the test tube

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Energy

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5th grade energy review

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Questions 30

Answers

1
When you are cold, rubbing your hands together quickly can warm them up. Why?
Mechanical energy is converted to sound.
Electrical energy is converted to mechanical.
Thermal energy is converted to electricity.
Mechanical energy is converted to thermal energy.
2
When circuit wires are connected to a battery, how should they be arranged?
Both connected to positive end.
Don't connect the battery at all, it's useless.
One connected to positive end, and one connected to negative
Both connected to negative end.
3
Palm oil, algae, sawdust and methane gas are classified as sources of energy from
hydroelectricity
the sun
biofuels
geothermal activity
4
What type of alternative energy is similar to forces of erupting volcanoes?
solar energy
geothermal energy
hydroelectric energy
wind energy
5
A spoon will look bent in a glass of water because
light bounces back as water absorbs different colors
light bends because water absorbs different colors
light bends as it passes from water to air
light bounces back as it passes from water to air
6
What basic materials are necessary for a circuit?
battery, wire, switch, bulb
wire, switch, buzzer
battery, wire, bulb
battery, wire, switch, buzzer, bulb
7
Alternative energy sources are a clean type of ------------ energy
new
worn out
renewable
nonrenewable
8
Lightning is an example of what type of energy?
genetic
electrical
mechanical
solar
9
What is the main difference between series and parallel circuits?
One has better batteries
A series has multiple paths and a parallel only one
A series has one path, and a parallel has multiple paths
Both are the same, but one has longer wires
10
Lisa has two batteries in her battery holder, in her circuit. The light bulb won't light. Why?
The wires aren't connected properly.
Any of these.
The batteries aren't good batteries.
The batteries have wrong ends connected.
11
In a complete circuit, light bulbs will not light if
the path for the electric current to travel has two bulbs
the path for the electric current to travel is incomplete
the path for the electric current to travel is too long
the path for the electric current to travel is not straight
12
In a parallel circuit, Lisa has two switches down and one up. What will be the outcome?
All the bulbs will be lit.
All the bulbs will be out.
Two bulbs will be out, but one will be lit.
Two bulbs will be lit, and one will be out.
13
Which alternative energy can be captured in sails of ships and starts from solar energy?
biofuel
wind
geothermal energy
hydroelectricity
14
When wind power turns a turbine, it transfers
mechanical energy that is converted into electrical energy
electrical energy that is converted into mechanical energy
sound energy that is converted into electrical energy
thermal energy that is converted into mechanical energy
15
A solar powered house, a calculator, and a satellite all use what source of energy?
light energy
Electrical Energy
Sound Energy
Mechanical Energy
16
Which list contains only alternative energy resources?
solar, biofuel, wind, geothermal
hydroelectric, coal, gas, wind
wind, solar, oil, geothermal
biofuel, coal, geothermal, solar
17
How does light behave differently when it enters a prism?
The light ray transforms to heat when it strikes the glass
The light ray bends as it strikes the glass
the light ray becomes shorter as it strikes the glass
The light ray straightens as it strikes the glass
18
A pencil looks strange in a glass of water because the light
bends, causing the pencil to appear broken
bends, causing the pencil to appear whole
straightens, causing the pencil to appear broken
straightens, causing the pencil to appear whole
19
Mechanical energy refers to
the energy of position only
the energy of motion only
the energy of motion or position
the energy of machines
20
An astronaut doesn't hear a sound when he throws a rock against another rock in space. Why?
Rocks are not as hard on the moon.
Human ears do not work on the moon.
The atmosphere on the Moon is too cold for sound.
There is no air on the moon, and the sound cannot travel.
21
In a complete circuit with a light bulb, the light bulb is likely
producing light and heat
dark and cool
producing only light
dark but producing heat
22
Musical instruments cause air to vibrate. This is an example of:
mechanical energy
thermal energy
light energy
sound energy
23
Which best describes a parallel circuit?
The flow of electricity comes from more than one source.
The flow of electricity comes from one source.
Electricity flows along more than one pathway.
Electricity flows along one pathway.
24
Which type of alternative energy is found in the US, and uses dams and turbines?
energy from biofuels
hydroelectric energy
energy from the sun
wind energy
25
What should be done to make a complete circuit if you don't have a switch?
Tape the bulb directly to one side of the battery.
Connect the wires directly to the battery, one on each side.
Connect the wires directly to the battery on one side.
Nothing, it won't work without a switch.
26
When you dip your net into an aquarium but the fish isn't where it appears to be this is
refraction
blocked light
focus
reflection
27
A series circuit is cut on the wire between two light bulbs. What will most likely happen?
both will light up
One light bulb will light up
neither will light up
one bulb will light up then go out
28
When a light ray strikes a mirror, it bounces back due to
reflection
diffraction
refraction
electricity
29
When a bat searches for prey, it flies and uses echoes to find it. It is using-
thermal energy and light energy
sound energy and thermal energy
mechanical energy and sound energy
light energy and mechanical energy
30
Two students are using thermal energy with a test tube over a flame. The thermal energy is
measuring the substance in the test tube
shocking the substance in the test tube
heating the substance in the test tube
cooling the substance in the test tube

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