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# Energy student worksheets

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```									                        STUDENT ANSWER SHEET FOR YEAR 4/5
This program aims to give you some hands-on experiments which relate to:

DIFFERENT FORMS                         ENERGY CAN BE                        ENERGY CAN BE
OF ENERGY                             TRANSFERRED                         TRANSFORMED
(changed, converted)
Energy can be in different forms     Energy can be transferred
such as:                             from one place to another           Energy can be changed from
• Heat energy                       such as:                            one form to another such as:
• Light energy, solar (sun)
• Chemical energy                     •    A light beam can transfer       •   Someone striking a gong
– for example food                    the energy from one
• Energy due to movement,                  place to another                    A person uses chemical
called “kinetic”                                                           energy which changes to
– for example wind power,         •    Electricity in a wire               “movement energy” when
a moving ball                              transfers the electrical            they move their arm
• Energy due to height,                    energy                              through the air.
called “potential”
• Atomic energy, nuclear              •    Sound energy is                     The “movement energy”
energy                                 transferred from a                  changes to sound energy
• Electrical energy                        musical instrument to the           when the gong is struck.
• Magnetic energy                          ear

EXPERIMENT 1 – THE INCLINE
Aim: to study the energy changes that take place when a truck is pulled up a hill

Prediction (400) ………… weights              Prediction (300) ………… weights

Results:
Angle    No of weights                Angle   No of weights
0                                     0
10                                    10
200                                   200
300                                   300
400                                   400

Questions:
1. What or who supplies the energy to pull the truck up the slope?

2. Why does it take more weights to pull the truck up a steeper slope?
STUDENT ANSWER SHEET FOR YEAR 4/5
EXPERIMENT 2– ENERGY DUE TO HEIGHT
Aim: to study the energy changes involved when a ball rolls down a ramp

Results:

POSITION                SMALL BALL                     LARGE BALL LANDS
ON RAMP               LANDS IN BOX No.                    IN BOX No.
BLUE line

YELLOW line

RED line

WHITE line

Questions:
1. Where do the balls get the energy from to travel through the air?

2. Why do the balls travel further when they are released from higher up the ramp?

3. What happens to the movement energy that the ball has when it lands in the boxes?
MOVEMENT ENERGY

EXPERIMENT 3 – HEAT ABSORPTION
Aim: to study how heat energy affects different colours

Results: Predict which colour:
* will heat up the most ……………

* will heat up the least …………….

White        Yellow         Black          Red       Green   Blue

Starting
Temp
1
minute
2
minutes
3
minutes

Questions:
1. How did your predictions compare with you results?

2. Describe the energy changes that take place.
STUDENT ANSWER SHEET FOR YEAR 4/5
EXPERIMENT 4– LOTS OF ENERGY CHANGES
Aim: to study the energy changes involved when you react to light and sound

Results:
RESULTS                    SOUND                    LIGHT
Time 1

Time 2

Time 3

Time 4

Total Time

Average Time
(Total Divided by 4)
Questions:
1. Why is it difficult to get a reaction time close to zero?

2. For the LIGHT experiment, describe the energy changes that occur from when you first press the
“START” button to when you press the “STOP” button.

EXPERIMENT 5 – SOLAR ENERGY
Aim: to study energy changes involved in using solar cells to do work

Results:

0°                                       secs                              secs

10°

20°

40°

50°

Questions:
1. Describe the energy changes that take place when the light is turned on and the cart goes up
the slope.

2. Describe ( in terms of energy changes) why the heavier cart took longer time to climb the
ramp.

3. Describe (in terms of energy use) why the loaded cart could NOT climb the 500 slope.
STUDENT ANSWER SHEET FOR YEAR 4/5
EXPERIMENT 6– LASERS AND LIGHT ENERGY
Aim: to study how light energy can be transferred from one place to another

Results:

My PREDICTION                 My RESULT
(Yes or No)                 (Yes or No)
Hand

Paper

Clear Glass

Blue Perspex

Red Perspex

Frosted Glass

Questions:
1. What happens to the red light energy which is fired at the blue perspex and does not get
through?

2. Name 2 uses of lasers, which use the light energy to do something useful. Is the energy
changed to another form in some of these uses.

EXPERIMENT 7 – ENERGY AND EXERCISE
Aim: to investigate the sugar content in soft drinks

Results:

LIQUID         Your PREDICTION (%)              Actual RESULTS (%)

Questions:
4. Which drinks could supply the most energy to our bodies?
5. Do any liquids have almost zero sugar?

Aim: to measure the lung capacity and relate it to energy use.

Results

No 1                    No 2               measurement            during exercise?
STUDENT ANSWER SHEET FOR YEAR 6/7
This program aims to give you some hands-on experiments which relate to:
DIFFERENT FORMS                             ENERGY CAN BE                            ENERGY CAN BE
OF ENERGY                                 TRANSFERRED                             TRANSFORMED
(changed, converted)
Energy can be in different forms            Energy can be transferred
such as:                                    from one place to another                Energy can be changed from
• Heat energy                              such as:                                 one form to another such as:
• Light energy, solar (sun)
• Chemical energy                            •   A light beam can transfer           •   Someone striking a gong
– for example food                          the energy from one
• Energy due to movement,                        place to another                        A person uses chemical
called “kinetic”                                                                     energy which changes to
– for example wind power,                •   Electricity in a wire                   “movement energy” when
a moving ball                                    transfers the electrical                they move their arm
• Energy due to height,                          energy                                  through the air.
called “potential”
• Atomic energy, nuclear                     •   Sound energy is                         The “movement energy”
energy                                       transferred from a                      changes to sound energy
• Electrical energy                              musical instrument to the               when the gong is struck.
• Magnetic energy                                ear

EXPERIMENT 5 – SOLAR ENERGY
Aim: to study energy changes involved in using solar cells to do work

Results:

0°                                       secs                                secs
10°

20°

40°

50°

Questions:
6. Describe the energy changes that take place when the light is turned on and the cart goes up
the slope.

7. Describe ( in terms of energy changes) why the heavier cart took longer time to climb the
ramp.

8. Describe (in terms of energy use) why the loaded cart could NOT climb the 500 slope.
STUDENT ANSWER SHEET FOR YEAR 6/7
EXPERIMENT 6– LASERS AND LIGHT ENERGY
Aim: to study how light energy can be transferred from one place to another

Results:

My PREDICTION                 My RESULT
(Yes or No)                 (Yes or No)
Hand

Paper

Clear Glass

Blue Perspex

Red Perspex

Frosted Glass

Questions:
3. What happens to the red light energy which is fired at the blue perspex and does not get
through?

4. Name 2 uses of lasers, which use the light energy to do something useful. Is the energy
changed to another form in some of these uses.

EXPERIMENT 7 – ENERGY AND EXERCISE
Aim: to investigate the sugar content in soft drinks

Results:

LIQUID         Your PREDICTION (%)              Actual RESULTS (%)

Questions:
9. Which drinks could supply the most energy to our bodies?
10. Do any liquids have almost zero sugar?

Aim: to measure the lung capacity and relate it to energy use.

Results

No 1                    No 2               measurement            during exercise?
STUDENT ANSWER SHEET FOR YEAR 6/7
EXPERIMENT 8 – SOUND ENERGY
Aim: to show that sound energy is produced when various objects vibrate

Results: Answer questions 1, 2 and 3 today

Section 1:      Describe what happens when you strike the tuning fork
and place the tip into the water:

Section 2:      Describe what happens when you speak into the “phone”
with the string stretched:

Section 3:      Calculate the speed of the sound

Length of tube above the water surface …..….…cm                   =   ………… m

Speed of Sound =         4 x Length of tube above water x Frequency of sound
(metres/second)                (measure in metres)         (stamped on fork)

= 4 X                              X

Questions
1. Describe the energy changes that occur when the tuning fork is struck and placed in water

2. Describe the energy changes that occur when the string phone is used

EXPERIMENT 9 – CHEMICAL ENERGY IN FOOD
Aim: to use energy in food to boil some water

Results:

Temperature before heating =                    ………………….

Temperature after heating              =        ………………….
Food
Questions:
11. Describe the energy changes that take place.

12. Why would different types of food take different times to heat up the water?
STUDENT ANSWER SHEET FOR YEAR 6/7
EXPERIMENT 10 – ELECTRICAL ENERGY
Aim: To study ways we can make electricity from other forms of energy.

Results:

For each of the experiments, describe the energy changes involved in “how it works”:

1. Solar energy toys

2. Hot water / Cold water motor

3. Spinning wire and magnets : Generator

4. Using chemicals

EXPERIMENT 11 – MOTORS AND GENERATORS
Aim: to study how motors and generators change energy from one form to another

Results:

Questions:
13. Describe the energy changes that occur when a battery is used to
drive a motor?.

14. Describe the energy changes that occur when a generator is turned?

15. Torrens Island Power Station makes electricity for Adelaide; how are generators/turbines turned?

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