# Physical Science B SGI Lesson #20 (3-22-2018)

Electricity!

9

### Unit S.M.A.R.T. Goal:

Students will attain an 80% passage rate in 3 of 4 trials

### Objective:

Introduce students to the concept of Electricity.

### Life Connection:

Students will answer this question before leaving class today.

### Behavioral Norms:

• Learn from mistakes
• Tolerance
• Participate
• Personal electronics only when appropriate

### Key Concepts:

• Energy in Chemical Processes
• Wave properties
• Information Technologies and Instrumentation Practices

### Warm Up: (5 minutes)

Top 5!

On the index card provided, list the top 5 uses of electricity!

Example: Space Heating (The heater in your house could be electric instead of gas.)

1.

2.

3.

4.

5.

### Task #1  – Intro Questions (5 minutes)

Verbally answer the following questions with a partner:

1. What is static electricity?
2. How can you prove it exists in this room currently? Mini Experiment! (Hint: Balloons?)

### Task #2 – Recall (5 minutes)

What is the diagram below depicting?

Correctly place the following terms in the diagram:

1. Nucleus
2. Protons (+)
3. Neutrons (No Charge)
4. Electrons (-)

### Task #3 – Key Information to Remember ( Cornell Notes – 20 minutes)

Directions:

Utilize the Cornell Note sheet that I provide you today to take down information in this section.

Presentation -> Presentation – Introduction to Electricity

• Opposite charges have an attractive force! (Play with magnets!)

• Like forces repel! (Play with magnets!)

• The universe strives for stability!
• Atoms are typically neutral.

• Did you know?

• Atoms become charged by gaining or losing electrons.
• 3 Big Rules of Electrostatics
1. Opposites attract
2. Likes repel
3. Only electrons can move (protons move, but don’t leave the nucleus. Why? Because they are held in place by the strongest forces in the universe!)

• Question: What is the bottom part of a plug called? What is its function?

Answer: “The bottom prong of  a plug called the ground. It discharges any excess  charge that may develop in an electrical device”

• What IS a charged atom? It is an atom that has more electrons than protons.
• Look at the atom below? Is it charged or not? Explain your answer.

• Electrons flow toward positively charged objects. This is called current and is measured in Amps.
• DC or “Direct Current” only moves in one direction, like what is depicted below.

• Force of attraction = voltage
• In materials called insulators (plastic or glass for example) the electrons remain stuck in a cloud around each atom’s nucleus.

• But in a conductor (like the metal in wires) the electrons are able to move from atom to atom.

### Task #4 – Questions (5 Minutes)

1. How is static electricity different from an electric current?

## VS

1. Why is there spark?

### Task #5 – Socrative.com Questions ( 5 Minutes)

Go to Socrative.com and enter room “A89559b4”. Answer the questions on your laptops or cell phones.

### Task #6 – LAB TIME ( 15 Minutes)

#### Directions:

Now that we are armed with more knowledge about electricity it is time to put this knowledge to some use. First up I am going to provide each group with a kit like the one pictured below.

THE KIT:

With this kit we are going to make a stand alone circuit first and then a circuit with a switch. Refer to the white board diagram and key below to successfully build your circuits.

### Task #7 – Modifying our Class Made Cars Again ! ( 15 Minutes)

Remember the Balloon Cars and Mousetrap Cars we made in previous classes? If not click HERE to be taken to a previous lesson that shows off our cars or check out the .gif below.

Group #2’s Mousetrap car:

Directions:

Each group is going to be getting their cars  back, balloon and electric, and with their new electrical kits attempting to mount electric motors to one of these cars. These electric motors will be your cars new source of power. They will utilize electric instead of air or kinetic energy from a mouse trap. As a team attempt to figure out the best way these motors can be utilized on your cars.

### Task #8 – Science Scenario (Time Depending) ( 15 Minutes)

Directions:

ZOMBIE ATTACK! The world has been attacked by zombies and you are trying to survive! Your only hope right now? A working radio to hear where the zombies are coming from so you know where to avoid! PROBLEM! You only have the materials in your electrical science kit to get your radios to work! Your little survival radios take AAA batteries, but you only have C and D type batteries. As a team can  you figure out a way to power your radios using only what you have? Lets find out !

### Homework:

Review what we went over today. Click HERE to be take to the Unit 9 class notes.

### Next Generation Science Standards:

HS PS  2-5 Plan and conduct an investigation to provide evidence that an electric current can produce a magnetic field and that a changing magnetic field can produce an electric current.

HS PS 3-1 Create a computational model to calculate the change in the energy  of one component in a system when the change in energy of the other component(s) and energy flows in and out of the system are known.

HS – PS 3-5 Develop and use a model of two objects interacting through electric or magnetic fields to illustrate the forces between objects and the changes in energy of the objects due to the interaction.