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Conservation of Energy and Energy Transformation

Total questions: 22

Worksheet time: 26mins

Name
Class
Date
1.
The Law of Conservation of Energy states:
a)
Energy can created or destroyed but not transformed 
b)
Energy cannot be created or destroyed, it can only transformed
c)
Energy can't be created, destroyed or transformed
2.
According to the Law of Conservation of energy, the amount of energy before and after a reaction must be the same. Which statement below is true?
a)
The total amount of energy is conserved
b)
The total amount of energy is less after a reaction
c)
The total amount of energy is more after a reaction
3.
Which energy transformation below matches?
A book falling?
a)
chemical to sound and heat
b)
kinetic to sound and heat
c)
electrical to sound and heat
4.

Which is an example of a single energy transformation?

a)

A toaster converts electrical to thermal energy

b)

A match converts mechanical to thermal to electromagnetic

c)

A biker converts chemical to mechanical to thermal

d)

A car converts chemical to thermal to mechanical

5.

What is an example of multiple energy transformations?

a)

Your body transforms chemical to thermal

b)

Your body transforms chemical to mechanical

c)

a flashlight converts chemical energy in batteries to electrical to electromagnetic energy in light

d)

a phone converts electrical to electromagnetic

6.
Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?
a)
Chemical to light
b)
Electrical to chemical
c)
Electrical to light
d)
Chemical to electrical
7.
What energy transformations take place when a battery-operated radio is in use?
a)
Electrical to chemical to light
b)
Sound to chemical to mechanical
c)
Chemical to electrical to sound
d)
Light to electrical to thermal
8.
Turning on a lamp is an example of energy transformation from electrical to 3 forms of energy. Which of these is NOT created by the lamp?
a)
radiant
b)
light
c)
heat
d)
chemical
9.
When electrical energy flows through a light-bulb it creates ___ 
a)
heat energy only
b)
heat and radiant energy
c)
radiant energy only
d)
motion energy
10.
When you plug in an iron, electrical energy is transformed into ______ energy
a)
sound
b)
mechanical
c)
thermal (heat)
d)
radiant
11.
When a construction worker hits a hammer into plank of wood, the mechanical energy from the hit becomes _____ energy
a)
radiant
b)
electical
c)
heat and sound
d)
chemical
12.
Electrical -> Mechanical -> Sound 
a)
A triple beam balance measuring an object’s mass
b)
A pencil sharpener plugged into a wall outlet
c)
A projector displaying a diagram on the screen
d)
A working flashlight used to light up a dark corner
13.

The hand generator works by turning the handle which lights up the bulb. What energy transformation occurs as the handle is turned?

a)

Thermal to electrical

b)

Electrical to mechanical

c)

Mechanical to electrical to light

d)

Light to electrical

14.
Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?
a)
Chemical to light
b)
Electrical to chemical
c)
Electrical to light
d)
Chemical to electrical
15.

Maria’s father started a fire in the fireplace. He crumpled some paper, lit a match, and soon the logs in the fireplace were burning. In this case, the stored chemical energy in the logs was changed into

a)

electrical energy.

b)

mechanical motion.

c)

heat and light energy.

d)

electrical and heat energy.

16.

The light bulb converts electrical energy into light and _________.

a)

chemical

b)

electromagnetic

c)

heat

d)

nuclear

17.
An iron heats up to iron clothes 
a)
eletrical to thermal energy
b)
potential to kinetic energy 
c)
potential energy to thermal energy 
d)
chemical energy to mechanical energy
18.

Which of the following statements most accurately describes how a ipod is able to play music after it has been plugged in?

a)

The ipod is able to play music because it is using up the electrical energy from the wall.

b)

The electrical energy is transferred from the wall allowing the ipod to make sound energy as music.

c)

The ipod is able to play music because the outlet is creating electrical energy that is transformed to sound energy.

d)

The electrical energy from the outlet is transformed to chemical energy and then to sound and light energy when the ipod is used to play music.

19.
People get energy from the food that they eat and transform that energy as they move. Which energy transformations occur as a student rapidly rubs the palms of his hands together?
a)
mechanical to thermal to electrical
b)
chemical to mechanical to thermal
c)
mechanical to chemical to sound
d)
chemical to sound to electrical
20.
Turning on a lamp is an example of energy transformation from electrical to 3 forms of energy. Which of these is NOT created by the lamp?
a)
radiant
b)
light
c)
heat
d)
chemical
21.
In energy transformations, "wasted energy" usually takes what form?
a)
heat
b)
chemical energy
c)
light
d)
sound waves
22.

A teacher rubbed a match against a piece of sandpaper. The match started to burn. Which statement best describes the energy changes that occurred?

a)

The chemical energy stored in the match changed to thermal energy and light energy.

b)

The thermal energy stored in the match changed to light energy and chemical energy.

c)

The light energy and thermal energy stored in the match changed to mechanical energy.

d)

The light energy and thermal energy stored in the match changed to chemical energy.