Magnetism >:D

Well.. Matthew's job as scribe sorta got stolen again so... he can do it tomorrow (cuz he said i can do it) :D

Yesterday, we watched 'same same' guy, got our physics test back, worked on questions 1-10 in the textbook and got 2 worksheets which we corrected today! wheeeeeeeeeeeeeeeeeeee~!

CORRECTIONS (cuz that's all that we did today)

page 510. Questions 1-10

1. Like poles repel, opposite poles attract.

2. A temporary magnet is only magnetic under the influence of a permenant magnet.

3. Magnetic Metals: Iron, Colbalt, Nickel.

4.

5.

6. If you were to cut a magnet in half there wouldn't be seperate poles. New poles would form on both ends.

7.

8.

9.

10.

Magnetic Fields Worksheet (Answers)

1. Magnetic and electric forces both attract and repel. (north/south, positive/negative)

2.Difference is that electic charges can be seperated but magnetic poles are always in pairs.

3. A magntic field is the region of space around a magnet. Its source is the domain (which contains spinning electrons)

4. A domin consists of a bunch of spinning electrons oriented in the same direction.

5. Heating or dropping a magnet will disturb the domains and it will mix up and pont in different directions.

6. north

7. geographic north pole OR magetic south pole

8. domains

9. b. tin

10. c. never

11. a. north

12. Use a compass or bar magnet to se if it attracts/ repel.

13.

14. A piec of irn can become a mgnet is you stroke it with a permanent magnet in one direction.

MAGNETISM WORKSHEET (ANSWERS)

Wednesday September 24, 2008

Hey! Hey! Hey! Everybody! I hope you had a happy Wednesday!

Today in physics we did a lab and it was supposed to further your understanding of how light waves can BEND! So if you weren’t in class today (shame on you), you can probably read the rest of this post and do the little experiment at home. ;)

What you need: A ruler, a sheet of graph paper, a semi-circle dish thing, a marker, water

The Steps: (hopefully I remember right...)

Step 1: With your pencil, draw a line dividing the paper in half.

Step 2: Trace the outline of the semi-circle dish and make sure the flat side of the dish is on the line you just drew.

Step 3: With a marker draw two vertical lines on the side of the dish; one line in the middle of the flat side and one on the middle of the curved side.

Step 4: Place the dish back on the paper in the outline you drew of it and mark where the vertical lines are on the dish on the paper.

Step 5: Fill the dish about halfway with water.

Step 6: Bend down so your eyes are level with the dish full of water. Look for the vertical line you made and with your ruler draw a line in the direction of the mark. Do this four or five times, then repeat on the other side...

...Then fill out the Lab Worksheet... that I’m sure is worth marks...

So basically the gist of this activity was for you to analyze how the light bends and I’ll give you a hint if you’re stuck trying to analyze the bend of the light waves: one side of the dish refracted the light more than the other. ;) (I think... ha ha)

Class was fun today even though I probably screwed this activity up XD

The next scribe is miruiz.