S 8 P 5 Students will recognize characteristics

S 8 P 5. Students will recognize characteristics of gravity, electricity, and magnetism as major kinds of forces acting in nature. UNIT 7: ELECTRICITY AND MAGNETISM

Good Morning! � Come on in and design a cover page to Unit 7: Electricity and Magnetism. � Make colorful and creative!!!

Electricity S 8 P 5. Students will recognize characteristics of gravity, electricity, and magnetism as major kinds of forces acting in nature. � EQ: What is electricity? � Answer: (skip 3 lines)

Learning Goals � LG 2: I will demonstrate the advantages and disadvantages of electricity, describe the difference between series and parallel circuits, and explain magnetic force. � LG 3: I will demonstrate the advantages and disadvantages of electricity while connecting to realworld situations, describe the difference between series and parallel circuits, and explain magnetic force. � LG 4: I will demonstrate the advantages and disadvantages of electricity while connecting to realworld situations, explain the difference between series and parallel circuits, and explain magnetic force.

� Electric charges are from protons which are positive and electrons which are negative. � Atoms become charged by gaining or losing electrons.

� Static Electricity – the accumulation of excess electric charges on an object. � Law of Conservation of Charge – electric charges can be transferred from object to object but it cannot be created or destroyed.

� Positive and negative charges exert forces on each other. Opposite charges Attract Like charges repel

Conductors vs. Insulators � Conductors – material in which electrons move easily. � Ex. Metals � Insulators – material in which electrons are not able to move easily � Ex. Wood, plastic, rubber.

� Electric force – is the attraction or repulsion between electric charges. � Electric field – is a region around a charged object where the object’s electric force is exerted on other charged objects.

Charging Objects Charging by conduction – process of transferring charge by touching. Charging by induction – rearrangement of electrons on a neutral object caused by nearby charged objects. Charging by friction – is the transfer of electrons from one uncharged object to another by rubbing.

Static Discharge � EQ: What is an example of static electricity? � Answer:

� Static electricity – charges build up on an object, but they do not flow continuously.

� Static discharge – The loss of static electricity as electric charges transfer from one object to another. � When a negatively charged object and a positively charged object are brought together, electrons transfer until both objects have the same charge. �Ex. When people shock you

� Lightning is a dramatic example of static discharge. � Lightning Foldable!

1. Raindrops and ice crystals collide inside storm clouds creating electrical charges.

2. Electrical charges separate inside the cloud with electrons moving to bottom of the cloud and protons moving to the top.

3. Negative charges at the bottom of the cloud force positive charges to build up on the ground forming a large electric field.

4. Step leaders snake down from the cloud while streamers surge up from the ground, then –zap- lightning strikes!