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WorksheetsNCFE Practice Energy Conservation and Transfer
Total questions: 21
Worksheet time: 11mins
Name
Class
Date
1.
Which material is the best conductor of electricity?
a)
wood
b)
metal
c)
stone
d)
plastic
2.
Energy is transferred from the sun to Earth mainly by _______________.
a)
Sound Waves
b)
Air Currents
c)
Electromagnetic waves
d)
Electromagnetic waves
3.
When you are riding a bicycle at night, your bicycle's reflectors help people in cars see your bicycle. How do bicycle reflectors work?
a)
They are made of a special material that gives off its own light.
b)
They are hooked up to batteries that allow them to produce light.
c)
They bounce light back from other sources.
d)
They are covered with paint that glows in the dark.
4.
A thermometer shows that the outside air temperature is colder than the temperature at
which water turns to ice. However, ice on the sidewalk melts. What probably caused this?
which water turns to ice. However, ice on the sidewalk melts. What probably caused this?
a)
The air heating the sidewalk
b)
The sidewalk reflecting sunlight into the air
c)
The wind causing the ice on the sidewalk to melt
d)
The sunlight making the sidewalk warmer than the air
5.
Which statement explains why light from the Sun can warm up water in a glass?
a)
Light travels very fast.
b)
Light travels in straight lines.
c)
Water reflects light energy.
d)
Water absorbs light energy.
6.
In general, metals are _____________________________.
a)
poor conductors of heat
b)
brittle
c)
poor conductors of electricity
d)
good conductors of heat
7.
When you hold an ice cube, your hand feels cold because
a)
the cold flows from the ice cube to your hand.
b)
heat flows from your hand to the ice cube.
c)
ice is a poor conductor of heat.
d)
your hand is a better conductor of heat than the ice cube.
8.
The main method of heat transfer occurring within water is called __________.
a)
conduction
b)
convection
c)
radiation
d)
insulation
9.
Thermal energy is transferred through a material by the collision of _______ within the
material.
material.
a)
matter
b)
atoms
c)
crystals
d)
light
10.
Which of the following waves is not visible to the human eye?
a)
Red light
b)
Violet light
c)
Ultraviolet light
d)
Blue light
11.
The change in the direction of a wave when it enters a new medium is called________.
a)
Diffraction
b)
Reflection
c)
Refraction
d)
Superposition
12.
What kind of energy does a moving baseball have?
a)
Electrical
b)
Magnetic
c)
Mechanical
d)
Chemical
13.
Which kind of energy is produced by generators at a dam?
a)
Nuclear
b)
Electrical
c)
Chemical
d)
Solar
14.
Which of the following materials is the best insulator?
a)
Copper
b)
Nickel
c)
Gold
d)
Wood
15.
What is the primary source of energy on Earth?
a)
The Sun
b)
The moon
c)
Water
d)
Rocks
16.
The diagram below shows an incomplete electrical circuit that includes a battery, a bulb, and three wires labeled A, B, and C.
The bulb is not lit. What should be done in order to light the bulb and complete the circuit?
The bulb is not lit. What should be done in order to light the bulb and complete the circuit?
a)
Remove wire C.
b)
Remove the battery.
c)
Connect wires B and C.
d)
Connect wires A and B.
17.
The drawing below shows a copper wire with a wooden handle being held in a flame.
After a few minutes, what will most likely happen?
After a few minutes, what will most likely happen?
a)
The light will change to electricity.
b)
The heat will travel through the wire.
c)
The flame will get brighter.
d)
The flame will go out.
18.
When a person speaks into a telephone, sound energy is changed mostly into which form of energy?
a)
heat
b)
light
c)
electrical
d)
chemical
19.
A car skids along the road and smoke appears to be coming from under the tires. The heat that produces the smoke is caused by
a)
magnetism.
b)
sound.
c)
light.
d)
friction.
20.
What form of energy causes an ice cube to melt?
a)
mechanical
b)
magnetic
c)
sound
d)
heat
21.
What change of state is shown?
a)
Liquid to gas
b)
Solid to gas
c)
Gas to liquid
d)
Solid to liquid
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