# TTO1 - chapter 7 - Electricity

What is the most specific feedback you gave yourself?
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Slide 1: Open question
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This lesson contains 37 slides, with interactive quizzes, text slides and 3 videos.

Lesson duration is: 45 min

## Items in this lesson

What is the most specific feedback you gave yourself?

#### Slide 1 -Open question

Electricity
What do think of?

Electricity

#### Slide 3 -Mind map

How is this experiment possible?
Write down keywords

#### Slide 4 -Open question

Which questions have you got about the homework? Mention page and question number.

#### Slide 5 -Open question

What is static electricity?

#### Slide 7 -Video

Which particles are responsible for
(static) electricity?

#### Slide 8 -Mind map

What are the characteristics of these electrons?

#### Slide 9 -Mind map

Characteristics electrons
Negatively charged
Loosely bound
On the outside of the atom

#### Slide 10 -Slide

A particle (atom) has 10 protons, 10 neutrons and 10 electrons.
What is the overall charge?
A
0
B
10
C
20
D
30

#### Slide 11 -Quiz

A particle (ion) has 9 protons, 10 neutrons and 10 electrons.
What is the overall charge?
A
0
B
-1
C
+1
D
+2

#### Slide 12 -Quiz

Another particle (ion) has 11 protons, 12 neutrons and 10 electrons.
What is the overall charge?
A
0
B
-1
C
+1
D
+2

#### Slide 13 -Quiz

Particles and charge
A particle (atom) has 10 protons, 10 neutrons and 10 electrons --> Ne
A particle (ion) has 9 protons, 10 neutrons and 11 electrons. --> F-
A particle (ion) has 11 protons, 12 neutrons and 10 electrons. --> Na+

NB! Write the - and + at the top just like in maths.

#### Slide 14 -Slide

rubbing
What action is important to create static electricity?

Conductors
Insulators

#### Slide 16 -Drag question

Give examples of where static electricity occurs.

#### Slide 17 -Mind map

Static electricity occurs
1. polyethene (plastic) rods rubbed with a woolen cloth
2. rubbing something with a dry duster
3. pulling off a woollen or synthetic jersey
4. jumping on the trampoline
5. sliding of the plastic slide
6. Van de Graaff generator
7. electric equipment with moving parts, eg. fan (ventilator) of a computer
8. brushing your hair with a plastic comb or brush
9. lighting = discharge of staticly charged clouds

#### Slide 18 -Slide

What is static electricity?

#### Slide 20 -Video

Van de Graaff generator

#### Slide 21 -Slide

Today
1. Lightning - recap static electricity + danger
2. Generation of electricity - how is it made
3. Batteries
4. How is electricity used in different devices.
5. Resistancy + calculations
Next lesson = last lesson!!!

#### Slide 22 -Slide

- two insulating* objects, eg. large clouds with ice crystals
- rubbing movement
- electrons jumping from one object to the other
- charge = energy carried by an electron
* insulators are needed to make sure the electrons stay on the objects and don't escape
What is needed for static electricity?

#### Slide 23 -Mind map

Needed for static electricity
•  two insulating* objects, eg. large clouds with ice crystals
• rubbing movement
• electrons jumping from one object to the other
• charge = energy carried by an electron
* insulators are needed to make sure
the electrons stay on the objects
and don't escape

#### Slide 24 -Slide

Movement
Coil of metal wire
Magnet
Axle
What is needed to generate electricity?

#### Slide 25 -Mind map

Types of Energy Sources
Wind, sun, food, biomass

Water: hydroelectricity, waves, tides

Fossil fuels (gas, oil, coal, petrol), nuclear
Green
Blue
Grey
Renewable
Non-Renewable

#### Slide 26 -Slide

Batteries
Go and take a look at the first battery on page 9.

#### Slide 27 -Slide

What energy change occurs in a battery?
A
movement --> electric
B
potential --> electrical
C
chemical --> electric
D
chemical --> potential

#### Slide 28 -Quiz

How does a battery work?
Two metals react such as zinc and silver

releasing electrons.
Wet cloth functions as electrolyte =
liquid passing through the electrons
Zn(s)Zn2+(aq)+2e
Ag++eAg(s)

#### Slide 29 -Slide

Discovery Education Video

#### Slide 30 -Slide

Electric push = voltage
Battery provides chemical energy to push round the current in the circuit.
What is the current?

#### Slide 32 -Video

What is electric current?

#### Slide 33 -Open question

Electric current = flow of e-
Flow of electric charges = electrons (page 85).
Electric circuit is needed = path along which electricity can flow (p. 87).
For the current to flow the circuit needs to be complete = a circuit with no gaps.

What happens in each part of the circuit starting from the battery?
Discuss in pairs.
After: random turns

#### Slide 34 -Slide

How is electricity used in different devices?
- Light bulb
- LED light (Light Emitting Diode)
- Taser

#### Slide 35 -Slide

Today
You choose out of the following activities:
1. Using the learning objectives > study planner > Magister verify if you grasp all the test matter. Ask specific questions. Science lab?
2. Discuss content questions from phet assignment with teacher. Come to front.
3. I had technical difficulties with the phet assignment. I'm going to check my email in order to resolve them.
4. Discuss calculations about resistance with the teacher.
5. Continue working on the BONUS material from the book or the calculations workheet.

#### Slide 36 -Slide

I'm going to do the following:
Raise your hand if you choose option 5.
A
Learning objectives with study planner
B
teacher explanation phet assignment (content)
C
teacher explanation calculations
D
Resolve technical difficulties