1. Chapter 2
8th Grade

2. VOCABULARY Magnet Magnetism Magnetic Pole Magnetic Force Conductor
LESSON 1:
Magnet
Magnetism
Magnetic Pole
Magnetic Force
Conductor
Force

3. magnet

4. Magnet Every magnet, regardless of its shape, has two magnetic poles.
North & South

5. Opposites attract Magnetic poles that are unlike attract each other.
Magnetic poles that are alike repel

6. What are magnets attracted to?
Iron

7. Pop quiz

8. Magnets keep train on trackPg
Maglev Video
Magnets keep train on track

9. A maglev train floats above its rails due to magnetism.

10. Untamed Video

11. Magnetic Force- the attraction or repulsion between magnetic
Pg. 48
Magnetic Force- the attraction or repulsion between magnetic

12. Force- a push or pull that can cause an object to change its motion

13. Magnetic Field
A magnetic force is produced when magnetic poles are intact
The is a picture of the invisible “magnetic fields”. Someone poured “iron fillings” on top of the magnet for them to appear.
Magnetic field is spread out and curved

15. Magnetic Pole- an end of a magnetic object, where the magnetic force is “strongest” The farther away the weaker the force is

16. Students did Lesson 1 and workbook alone.

17. Magnetic Field Magnetic Field Lines Compass Magnetic Declination
Lesson 2 Vocabulary
Magnetic Field
Magnetic Field Lines
Compass
Magnetic Declination

18. Pg. 59
1a. Define a magnetic field.
1b. Describe the magnetic field of a south/south pole arrangement.

19. Compass- is a device that has a magnet on a needle that spins freely
Does a compass always point North?

20. A compass behaves as it does because the EARTH acts as a giant magnet.

22. The compass needle doesn't point toward the earth's North Pole, it is aligned with the local field lines, which may not even point to the magnetic North Pole.

24. However, they are close enough to get you towards the right direction.
The poles of a magnetized compass needle align themselves with Earth’s “North Magnetic Field” not necessarily the “North Pole”.
However, they are close enough to get you towards the right direction.

26. The difference between the magnetic poles and geographic poles.
Magnetic Declination
The difference between the magnetic poles and geographic poles.

27. Free Test question
As Earth’s magnetic poles move, the magnetic declination in a given location will change.

28. Do the math pg. 61

29. Quiz 1 What does a North & North magnetic pole do?
What does a North & South magnetic pole do?
Magnet
Force
Where is the strongest part of a magnetic field / the weakest
A magnet always points which direction
What is the magnetic rock called?

30. Electromagnet lab

31. How can you increase the strength of an electromagnet’s field?
Wire
Battery (ferromagnetic material)
Solenoid
Loops
Loose loops vs tight loops
USING A STRONGER FERROMAGNETIC (BATTERY) MATERIAL FOR THE CORE

32. ELECTROMAGNET
A STRONG MAGNET THAT CAN BE TURNED ON AND OFF

33. INCREASING THE NUMBER OF LOOPS IN A SOLENOID WILL CAUSE THE STRENGTH OF ITS MAGNETIC FILED TO ______________?

34. Hans Christian Oersted

35. A COMPASS MIGHT NOT POINT NORTH IF PLACED NEAR A WIRE WITH A CURRENT, WHY?
THE CURRECT (MAGNET) CREATES ANOTHER MAGNETIC FIELD ASIDE FROM THE EARTH’S NATURAL MAGNETIC FIELD AND CHANGES THE DIRECTION

36.
AN ELECTRIC CURRENT PRODUCES A MAGNETIC FIELD.

38. Research
Galvanometer

39. Galvanometer
an instrument for detecting and measuring small electric currents.
an instrument for detecting and measuring small electric currents.

41. Electric motor- transforms electrical energy into mechanical energy
Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work. In other words, it is energy in an object due to its motion or position, or both.
Electrical energy is a form of energy resulting from the flow of electric charge. 

42. Do car motors have magnets?
Almost anything that uses a motor or electricity to operate is built with magnets

44. Magnet fact
Magnets are attracted to IRON.

45. How can iron fillings be used to map out the magnetic field of an magnet?