Akoranga 1 Mahi Tuatahi ^🔗

1. Collect a whiteboard from the front
2. In pairs, brainstorm things you think you know about electricity
3. Anything at all!

1. Title a new page ELECTRICITY
2. Glue in the learning outcomes/ngā whāinga ako sheet
3. Write the date in your book
4. Write the learning outcome for today:
   • Explain how static electricity is created by the removal or addition of electric charge.

Electricity as a Job ^🔗

Electricity for Fun ^🔗

Electricity as Danger ^🔗

Van der Graaf Generator ^🔗

• The dome builds up a charge, and this can be used to do all kinds of interesting things
• The wand is used to complete the circuit and to stop charge building up
• Key: Opposites attract and likes repel

Tinfoil Pie Containers ^🔗

• Pātai: Why do they not fly off straight away?
• Whakatika: Because the circuit is complete; no charge building up.
• Pātai: What will happen when the circuit is broken?
• Whakatika: Positive charge begins to build up on the dome, so the tinfoil pie contains repel each other.

Lightning ^🔗

• Pātai: What is happening when the circuit is not complete?
• Whakatika: Charge is building up in the dome
• Pātai: Why does lightning occur?
• Whakatika: Because the charges want to balance out.

Van der Graaf Generator Explained ^🔗

Akoranga 2 Mahi Tuatahi ^🔗

1. Collect a whiteboard from the front
2. In pairs, draw and label a diagram of an atom!

Te Whāinga Ako ^🔗

1. Explain how static electricity is created by the removal or addition of electric charge.

Write the date and te whāinga ako in your book

Atomic Structure ^🔗

• Nucleus: The centre of the atom (strongly held: protons, neutrons)
• Orbit: Loosely held electrons orbit around the nucleus

Removing/Adding Charge ^🔗

• The nucleus is strongly held and is positively charged because it contains protons which have a positive charge.
• Neutrons have no charge (neutral)
• The electrons are loosely held, and are negatively charged.
• Electrons can be removed from a material via friction

Pātai: Why can’t protons (positive charge) be removed? ^🔗

Discuss with the person next to you!

Whakatika ^🔗

• Protons are in the nucleus which is strongly held
• The nucleus is the core of what makes up matter
• Therefore, we can more easily remove the loosely held electrons
• To remove the protons is to change what the matter is

Static Electricity ^🔗

An imbalance of charge on the surface of, or inside a material. Imbalances in charge will always attempt to balance out (become neutral), by having charges move.

Electrostatic Induction ^🔗

• Bringing a charged object near a neutral one can induce a localised opposite charge. Therefore, creating attraction between the two objects
• Make a note of this diagram and notes in your book.
• Explain how you can use an electroscope to determine whether an object is charged or not.