SCIENCE: Understanding Electricity

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Adapted from: Science Education Assessment Resources (SEAR) http://cms.curriculum.edu.au/sear/newcms/view_page.asp?page_id=3306

P1.0

Which of the following describes you best:

Parent

Teacher

Student

Other:

Clear selection

P1.1

Your first name:

P1.2

Your last name:

P1.3

What is your email address:

P1.4

If you are a student or teacher, which year or class / year group:

What is Electricity - The Scientific View:

Which sentence(s) do you think best describe(s) what electricity is:

A. Electricity is the electromagnetic field energy sent out by batteries and generators.

B. Electricity is the particles: the electrons and protons themselves (the electric charge, not the flow).

C. Electricity is the flow of electrons (the flowing motion of the electric charge).

Q1.1

Which of the descriptions (above) do you think best describes what electricity is:

Description A

Description B

Description C

All of the above

None of the above

Other:

Clear selection

Q1.2

Explain why you think that description is correct:

Q1.3

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q1.4 Which diagram(s) best show how a simple electrical circuit works:

Q1.4

Select which of the above diagrams (a) - (f) best show a simple electrical circuit:

Circuit (a)

Circuit (b)

Circuit (c)

Circuit (d)

Circuit (e)

Circuit (f)

None of the above

All of the above

Other:

Clear selection

Q1.5

What is your reason for making that choice:

Q1.6

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q1.7

Which of these do you think SCIENTISTS use to measure a quantity of electricity:

Current of electricity

Kilowatt Hours of electricity

Coulombs of electricity

Amperes of electricity

All of the above

None of the above

Other:

Clear selection

Q1.8

What is your reason for making that choice:

Q1.9

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q1.10

What is an 'electric charge'

Stuff that flows during an electric current

Only ELECTRONS

Only NEGATIVE particles

Only POSITIVE particles

Cost per Kilowatt Hour of electricity

Clear selection

Q1.11

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q2. Big Simple Circuits - Use & Measurement:

Q2.1

How much electricity does a lamp use up while it is turned on & in use?

NONE - it flows out of the lamp and back down the wire

ALL - the lamp filament uses up all of the electricity

NOT ENOUGH INFORMATION - Depends on how powerful the lamp is

Clear selection

Q2.2

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q2.3

Electricity that is generated at the power station flows inside metal wires to power outlets in homes and businesses, where it is used up by lamps and other electrical appliances.

TRUE

FALSE

Clear selection

Q2.4

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q3. Simple Circuits - Speed & Motion:

Q3.1

When a battery driven flashlight is turned on, the thin filament-wire gets hot and makes light because there is electric current in the metal. This current is a motion of something. How fast does this "something" move?

Moves very slowly - like the minute hand on a clock

Moves very fast, like the speed of light

Moves slowly for a a second or two & then fast

Nothing moves

Clear selection

Q3.2

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q3.3

Each electron carries energy to the lamp, deposits its energy in the hot filament, and then returns to the battery where it's re-filled with energy

TRUE

FALSE

Clear selection

Q3.4

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q3.5

When a battery runs down (goes flat), it's because all of its electrical charges have been lost or used up:

TRUE

FALSE

Clear selection

Q3.6

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q4. Electricity - Path, Work & Flow:

Q4.1

Q4.1 What is the stuff that flows through a light bulb and comes back out again through the other wire?

Electric Charge

Electrical Energy

Electrons

Volts

Current

All of the above

None of the above

Clear selection

Q4.2

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q4.3

What is the stuff that flows into a light bulb and gets changed entirely into light and heat?

Electric Charge

Electrical Energy

Electrons

Volts

Current

None of the above

All of the above

Clear selection

Q4.4

Q1.2 How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q5. Getting There - A Question of Distance vs Speed:

Q5.1

Q5.1 Which of the following actions will create a voltage that will push electric charges along

Move a magnet past a copper wire

Connect two ends of a wire to a resistor

Connect one end of a battery to a lamp

Connect a wire to each side of a lamp

None of the above

All of the above

Clear selection

Q5.2

What is your reason for making that choice:

Q5.3

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

If electrons move slowly, why does a light turn on almost instantly when I press a switch that is a long way away:

A. Electrons are arranged like a chain/loop - Tug one end and the opposite end moves almost immediately

B. Electrons don't move slowly - they move very fast.

C. Speed depends only on thickness of the wire between the lamp & switch

D. Electrical energy does not depend on electrons

Q6.1

If electrons move slowly, why does a light turn on almost instantly - Which explanation (above) is correct:

Other:

Clear selection

Q6.2

What is your reason for making that choice:

Q6.3

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q7. Power & Simple Circuits:

Q7.1

What is the difference between the types: 'D'. 'C', 'AA' and 'AAA' battery cells

Bigger batteries have larger voltage

Bigger batteries make lamps glow brighter

Bigger batteries can run lamps for a longer time

Bigger batteries are cheaper but heavier

Clear selection

Q7.2

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q7.3

Why are at least two wires needed to make a circuit:

Circuits must have 1 Positive & 1 Negative wire

Only one wire is required

Two wires are required to connect the lamp

Three are required

Clear selection

Q7.4

What is your reason for making that choice:

Q7.5

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

Q8. Simple circuits - Measuring electricity:

Q8. How energy travels in a simple battery & lamp circuit:

==== DESCRIPTION A ==================================
Whenever a battery powers a light bulb, the battery pours out electrical energy into space. That electromagnetic field (EM) energy is then grabbed firmly by the wires and guided by them. The field energy flows parallel to the wires, and eventually it dives into the lightbulb filament. There, it drives the metal's population of movable charges forward, against the resisting force of electrical "friction."

Electrons in the metal momentarily speed up before colliding with tungsten atoms. In this way the electrical energy gets converted into thermal energy (heat + light).

As a whole, an electric circuit is like a duct for electrical energy, but this duct has no walls.
------------------------------------------------------------------------------------------------------

==== DESCRIPTION B ==================================
Electrical energy flows inside the metal wires.

Electrons in the metal wires momentarily speed up before colliding with tungsten atoms. In this way the electrical energy gets converted into thermal energy (heat + light).

As a whole, an electric circuit is like a duct for electrical energy.
------------------------------------------------------------------------------------------------------

Please select one of the above options in next question (Q8.1)

Q8.1

Description A is the most accurate description

Description B is the most accurate description

Description A & Description B are BOTH INCORRECT

Other:

Clear selection

Q8.2

What is your reason for making that choice:

Q8.3

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

Clear selection

How Safe Are Flashlight Batteries:

A. If you had deep cuts & those cuts pressed against the battery terminals, a standard 6V flashlight battery might kill you.

B. Standard flashlight batteries are safe & cannot electrocute people.

C. Touching a single flashlight battery could electrocute someone with a heart pacemaker.

Q8.4

Can standard flashlight batteries electrocute people: which sentence(s) (above) is/are correct

Sentence A

Sentence B

Sentence C

Other:

Clear selection

Q8.5

What is your reason for making that choice:

Q8.6

How confident are you on a scale of 1 to 5 that your answer is correct (1=confused and 5=certain)

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