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# Static Electricity Worksheet Answers

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```									          Changing Circuits

Electricity for year 6

http://www.westwightmiddle.iow.sch.uk/sci/6g/elec.ppt
Thursday, 18 August
INDEX                             1
2011
Index
lesson 1: Making a class circuit
lesson 2: Making circuits
lesson 3: Electric current and safety
lesson 4: Fiddling with bits of wire
lesson 5: The brightness of bulb & the speed of motors
lesson 6: circuit diagrams
lesson 7: Resistance
lesson 8: Is electricity dangerous?
lesson 9: Solving problems
Lesson 10: Assessment
Thursday, 18 August 2011                            INDEX           2
Revision

Look at section 9 of the study book

Thursday, 18 August
INDEX          3
2011
Lesson 1

Making a class circuit.

Thursday, 18 August 2011          INDEX   4
Equipment
 Lengths of wire stripped at both
ends.
 One light bulb in holder.
 One battery (three cells in a holder).
 One simple switch.
 Handouts.

Thursday, 18 August 2011           INDEX              5
Objectives

Know that a working circuit depends on a
complete circuit.

Know that electricity flows around a circuit in
one direction.

Know that a break in a circuit will stop
electricity flowing.
Thursday, 18 August 2011                      INDEX                 6
By the end of the lesson…

A careful drawing of the CLASS CIRCUIT.

the CLASS CIRCUIT.

Thursday, 18 August 2011                    INDEX              7
Assessment

GOOD                 BETTER                FANTASTIC

describe             answers say           used your
what you             a little              scientific
found out.           about why             knowledge to
things                explain why
happened.             things
happened.
Thursday, 18 August 2011                 INDEX              8
Round ups

• This lesson I learnt…
• What I don’t quite understand is…
• The bit I did best was…
• I would like to know more about…

Thursday, 18 August 2011              INDEX       9
Lesson 2: Making circuits
Today, you will be making circuits using the
electrical components.

Why?
To learn what the parts are and how they fit
together.

Thursday, 18 August 2011                     INDEX                10
Equipment list
Electrical modules
Crocodile wires
Battery modules

Thursday, 18 August 2011         INDEX   11
Components

Thursday, 18 August 2011   INDEX   12

draw

Both bulbs light up dimly       caption
because the energy is shared.
Thursday, 18 August 2011           INDEX     13
Round ups

I know that I must have a complete circuit with no breaks.

I know that a switch makes a break in the circuit to stop
the electricity flowing.

I know that good connections are important.

Thursday, 18 August 2011              INDEX                  14
Lesson 3

 To learn about how electricity flows.
 To get some idea about what
electricity is.
 To learn about electrical safety.

Thursday, 18 August 2011           INDEX             15
Equipment list.

Video: Electricity with Ellie the Electron

Animation

Thursday, 18 August 2011                      INDEX            16
Video

What’s this video called?

Thursday, 18 August 2011                   INDEX   17
Key questions
In which direction did the electricity flow around
the circuit?

The electricity flows…

What is it that actually flows? (What particles?)
The particles that flow are called…

What part of the wire does the electricity flow
through?
The part of the wire the electricity flows through
is…
Thursday, 18 August 2011                    INDEX                18
How well did you do?
GOOD                   Better
I was able to answer   I used my scientific
the questions.         knowledge to answer the
questions.

How will the teacher
know?                  How will the teacher be
sure?

Level 3               Level 4

Thursday, 18 August 2011        INDEX                 19
Lesson 4

Fiddling with bits of wire

Thursday, 18 August
20
2011
Equipment
For pupils working in pairs:
• Three short pieces of wire
• Light bulb with no holder
• A single cell with no holder
• A switch with no wires or holder
• Handouts
For demonstration on teacher’s bench
•One 12v transformer
•Lots of crocodile leads
•One light bulb in holder
Thursday, 18 August 2011                                INDEX   21
Getting started...

We will be connecting up a big
circuit to the classroom tap but
where does the electricity flow?

Thursday, 18 August 2011                INDEX            22
Objectives
To learn exactly where wires connect to
bulbs, cells and switches.

To get the idea of connecting the
components in a circuit.

To learn how to add useful captions to your
drawings.

Thursday, 18 August 2011                     INDEX              23
To learn exactly where wires connect to bulbs, cells and switches.
To get the idea of connecting the components in a circuit.
To learn how to add useful captions to your drawings.

A challenge!
Use the parts to make the bulb light.

Draw your working circuit.
Try to make it clear where the wires
actually connect.

Thursday, 18 August 2011                                   INDEX    24
To learn exactly where wires connect to bulbs, cells and switches.
To get the idea of connecting the components in a circuit.
To learn how to add useful captions to your drawings.

Another challenge…
Use all three pieces of wire and the
switch.

Can you make the light work with the
switch?

caption to describe what the drawing is
Thursday, 18 August 2011                                   INDEX    25
Testbase
Testbase worksheet: Work in pairs

To learn exactly where wires connect to bulbs, cells and switches.
To get the idea of connecting the components in a circuit.
To learn how to add useful captions to your drawings.

Thursday, 18 August 2011                                   INDEX                26
To learn exactly where wires connect to bulbs, cells and switches.
To get the idea of connecting the components in a circuit.
To learn how to add useful captions to your drawings.

Plenary: Green, amber or red?
 Make a simple circuit with a few parts.
 Know where the wires should connect.
 Know what components are.
 Be able to draw clear diagrams.
 Be able to use a caption to describe
what a diagram is about.
Thursday, 18 August 2011                       INDEX                27
Thursday, 18 August 2011

Lesson 5

The brightness of bulbs and the
speed of motors

28
Getting started

   Animation
   Look at page 69 of the STUDY BOOK.

Thursday, 18 August 2011          INDEX        29
Thursday, 18 August 2011

Objectives
 Learn what affects the brightness of
a bulb.
 Learn how to change the speed of
motors.

INDEX          30
Thursday, 18 August 2011

What I am looking for…
 By looking at your drawing and
writing, I will be able to know what
you understand.
 Clear drawings that show how the
components are connected.
 Captions that explain how things
work.

Learn what affects the brightness of a bulb.   INDEX   31
Learn how to change the speed of motors.
Thursday, 18 August 2011

Drawings with captions that
explain.

a clear
drawing

a caption               The bulbs in this circuit are quite dim.
that               This is because…
explains

Learn what affects the brightness of a bulb.             INDEX                        32
Learn how to change the speed of motors.
Testbase / Revisewise
   Using example questions or bits from
the Revisewise DVD.
Thursday, 18 August 2011

How well did you do?
Fist of five…

 My drawings are very clear. You can
see what the components are and
where the wires connect.
 My writing shows that I understand
how to change the brightness of
bulbs and the speed of motors.
 I finished my work on time.

Learn what affects the brightness of a bulb.   INDEX   34
Learn how to change the speed of motors.
Homework
 Revise page 69 of the Study Book and
start to work through the questions
on page 70
Or
 Look at the BBC revision pages for
electricity.

Thursday, 18 August 2011         INDEX          35
Thursday, 18 August 2011

Lesson 6

Circuit diagrams

This may take two sessions.

36
Equipment
 Handouts
 Study guides
 Electrical kits
 Electricity table mats

Thursday, 18 August 2011              INDEX   37
This lesson…
Objectives                What I am looking for

   To learn the idea        Your drawings are
of drawing circuits       clear and have
with proper               labels.
symbols.                 You are confident
   To learn to make          about making the
circuits by using         circuits shown in
circuit diagrams.         the diagrams.

Thursday, 18 August 2011                 INDEX               38
Thursday, 18 August 2011

Circuit diagrams                                       Use your study
guide.

1.   Look at the diagrams:
Spot & draw the symbol
for a battery (more than
one cell).
2.   Spot and draw the symbol
for a lamp (both types).
3.   Spot & draw the symbols
for an ordinary switch
and a push switch.
4.   Spot and draw the symbol
for a motor.
5.   Spot and draw the symbol
for a buzzer.                      6. Now use the equipment to make these circuits.
Draw them if there’s time.

To learn the idea of drawing circuits with proper symbols.      INDEX                        39
To learn to make circuits by using circuit diagrams.
Thursday, 18 August 2011

More
complicated
circuit diagrams

Use your study guide.
Use the electrical modules to try
these.
Show your teacher as you
complete each one.
To learn the idea of drawing circuits with proper symbols.   INDEX   40
To learn to make circuits by using circuit diagrams.
Thursday, 18 August 2011

Symbols and drawings

Draw
proper
circuit
diagrams
for these
drawings.

To learn the idea of drawing circuits with proper symbols.   INDEX   41
To learn to make circuits by using circuit diagrams.
Thursday, 18 August 2011

 Controlling circuits 1
 Controlling circuits 2
 Controlling circuits 3

Use your study guide.

To learn the idea of drawing circuits with proper symbols.     INDEX             42
To learn to make circuits by using circuit diagrams.
Homework
 Page 68 of the STUDY BOOK
Or
 Check out the electricity section of the
BBC Key Stage 2 web site.
Or
 Revision pages 34 to 40 in the work book.
And…
 Complete any unfinished work from this
section.
Thursday, 18 August 2011             INDEX               43
Thursday, 18 August 2011

Round ups…
See Science Simulations DVD of circuit diagrams.
Then use WHITEBOARDS to draw…

 The symbol for one cell.
 A symbol for a bulb (lamp).
 A symbol for a switch.
 A circuit diagram with a 4½v battery,
a lamp and a switch.

To learn the idea of drawing circuits with proper symbols.   INDEX   44
To learn to make circuits by using circuit diagrams.
Lesson 7: Resistance

Thursday, 18 August 2011   INDEX   45
What are we doing?
Objectives                 What I am looking for
   To learn what             Working as a team
happens when               with different
electricity flows          people.
through long wires.       Writing a sentence
   To learn how to            relationship between
write a relationship       the length of the
answer.                    wire and the
brightness of the
bulb.
Thursday, 18 August 2011              INDEX              46
Equipment
   BBC Revisewise
DVD
   Electrical kits

Thursday, 18 August 2011         INDEX   47
To learn what happens when
electricity flows through
Relationships                  long wires.
To learn how to write a

Using BBC Revisewise DVD

   What is the relationship between the
number of cells and the speed of a motor?
   How does the number of bulbs affect the
brightness of the bulbs?
   What is the relationship between the
sharpness of a saw and the time it takes to
cut wood?
   How does the length of a car journey
affect the amount of fuel you burn?
Thursday, 18 August 2011                INDEX                   48
To learn what happens when
electricity flows through
long wires.

Round ups…
To learn how to write a

 I am confident about how to answer
relationship questions.
 I can describe how the length of the
wire affects the brightness of the
bulb.

Thursday, 18 August 2011          INDEX                   49
Lesson 8

Is electricity dangerous?

Thursday, 18 August
50
2011
Equipment
   Handouts
   van de graf generator with mains cable and accessory kit
   Materials kits
   6v bulb in holders
   Battery modules
   Conductivity worksheet
   Mains plug (altered to prevent it from being plugged in)
   BBC Revisewise DVD

Thursday, 18 August 2011                         INDEX                    51
Starter: How powerful is
electricity?
image 1: illustration of van de graf generator

Demonstration of a van de graf generator

You will learn much more about static
electricity in year 7

Thursday, 18 August 2011                      INDEX                52
Objectives
 To learn about insulation, conductors
and short circuits.
 To learn about the dangers of
electricity.

pause

Thursday, 18 August 2011           INDEX             53
fire

shock
Thursday, 18 August 2011       INDEX   54
Mains plugs
Inside a mains plug.

Key questions

Answer these questions as full sentences. (Some might need
more than one sentence.)
•Why are wires covered in plastic?
•The long and thin wire we used last lesson was not
covered in plastic. Why was this safe?
•Why is the outside part of a plug made from plastic?
•Why should you never touch electrical things with wet
hands?
Thursday, 18 August 2011                                  INDEX                     55
Short circuits
What is a short circuit?
What happens when you get one?

image 1           image 3            image 5
image 2           image 4            image 6

Sometimes, the live and neutral wires come in the
direct contact because of damaged wiring. When this
happens, there is nothing to control the current and a
very large current flows. This is known as Short Circuit.

Thursday, 18 August 2011                       INDEX                    56
Your teacher will show you what happens when you get a
short circuit.

Key Questions:

Answer as full sentences please. (Try not to use the
word ‘it’).

•What happened to the thin wire when a fault
occurred?
•Apart from shocks, why could electrical faults be
very dangerous?
•Explain how the fuse works to keep you safe when a
fault occurs.
•Why should you not use water on electrical fires?

Thursday, 18 August 2011                           INDEX                    57
Input
BBC Revisewise DVD:
Electricity / Electrical conductors &
insulators.

Thursday, 18 August 2011                    INDEX      58
Conductors & insulators: PRACTICAL

.Touch the two loose ends onto the metal parts of some
scissors.
.Why does the bulb light up? What does this tell you about
metal?
.Now try the same test on a block of plastic. What do you
know now about plastic?
.Now try the materials to see if they carry electricity.
Make a table of results and classify each material as:
A good conductor
A weak conductor
An insulator

Thursday, 18 August 2011                           INDEX                     59
Plenary
Work in pairs using a mini whiteboard.

 Draw what could happen if you get a
short circuit.
 What is the name of all materials
that carry electricity well?
 What is the name of an electrical
insulator we use a lot?

Thursday, 18 August 2011          INDEX            60
Lesson 9

Solving problems

Thursday, 18 August
61
2011
Objectives
 Learn how to use components and
wires to solve problems.
 Learn how to draw circuit diagrams of
circuits you have made.

Thursday, 18 August 2011          INDEX         62
Expectations
 Work quickly to complete the whole
assignment.
 Draw accurate circuit diagrams.
 Test circuits to find faults.

Thursday, 18 August 2011         INDEX            63
Solving problems: Part 1
An easy one to start with. There are three lights in a kitchen. Design
and make a circuit where they all come on with one switch.

1. Remove one bulb from its holder. Do the other two stay on? (They should do!)
2. Draw the circuit as a standard circuit diagram. Add a caption to explain the
function of the circuit.
3. Measure the current with an ammeter. Does the current change if one bulb is
removed? Add a caption to explain this part.

There are three lamps in a shed. Design and build a circuit that allows each
lamp to be switched on and off separately.

1. Draw the circuit as a standard circuit diagram. Add a caption to explain the function of
the circuit.
2. Measure and record the current with one, two and three bulbs switched on. Record
your results and explain any changes.

Thursday, 18 August 2011                                                  INDEX                                   64
Solving problems: Part 2
Charles Slime, the well known ‘smoothy’ likes to have ‘mood’
lighting in his sumptuous living room. Design and build the circuit
so that he can dim his table lamp.

1. Draw the circuit as a standard circuit diagram. Add a caption to explain the
function of the circuit.
2. Measure the voltage across the bulb as the potentiometer is turned.
3. Measure the voltage across the potentiometer as it is turned. Record your
observations.
4. Finally, measure the voltage across the bulb and potentiometer together as the potentiometer is
turned. Record your observation.
5. Conclude your findings for parts 2, 3 and 4 above.

Thursday, 18 August 2011                                         INDEX                                 65
Evaluation
fist of five

 I worked quickly and finished all the
work.
 My drawings are accurate and clear.
 I was able to find and mend faults.

Thursday, 18 August 2011           INDEX              66
Lesson 10: Assessment

Unit test

Thursday, 18 August
INDEX     67
2011
Equipment
   Unit test papers: One per student.

Thursday, 18 August 2011            INDEX           68

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