Grade 8 class activity report-Monday, March 23rd 2009

Topic: Electromagnetism

Duration: 1 period

Activity:

- the class activity began by asking students to recall about magnetism that they have learned

and sharing what they know about magnet. Then I began to do brainstorming with the

students about the definiton of "electromagnetism" (it derives from the word electro and

magnet).

- after brainstorming, I continued to explain about electromagnetism in details. For this topic,

students are going to make their own electromagnet. This activity will be done tomorrow

(Tuesday, March 24th 2009) in groups. This activity is based on Oersted's Experiment.

- As the closing, I asked students to prepare the materials needed for tomorrow activity.

Grade 8-Electromagnetism (Lab activity on Tuesday, March 24th 2009)

ELECTROMAGNETISM

Oersted's Experiment
In 1819, a Danish scientist named Hans Christian Oersted discovered a close relationship between electricity and magnetism with this experiment. Oersted's discovery led to the study of electromagnetism. Try Oersted's experiment yourself!


Materials You Will Need:
- Two batteries (size D)
· - Small, non-metallic bowl
· - Needle
· - Modeling clay
· - Switch (you can make the switch from paper clips)
· - Tape (cellotape)
·
Steps to Create Oersted's Experiment:
-Stroke needle 50 times from center to one end with
magnet. Tape on cork and place in bowl of water.
- Watch direction of needle when you move magnet n near it.
- Place wire over top of dish. Secure it with clay.
- Connect one end of wire to switch.
- Connect other wire end from switch to negative (-)
lead of your batteries.
- Connect other wire end from bowl to positive (+) lead
of your batteries.

- Close switch. Observe results.

You've done the experiment that Oersted did— and have shown that there's a magnetic field around the circuit wire when the electric current is flowing. When the current flows, the magnetic needle is deflected at right angles to the circuit wire.

This experiment is one of the most important in the utilization of electric power—it led to the discovery of electromagnetism and the development of the electric motor.

Chapter 4 Grade 7: States of Matter

States of Matter & Physical Change
(Course Outline)

A. The Particulate Model of Matter
A.1 What is Matter Made of?
A.2 Particulate Models in Science
A.3 Investigate Solids, Liquids and Gases and Their
Inter-conversion

Time allotment: Tue, March 17 – Tue, march 24, 2009

B. Physical Change
B.1 Changes around Us
B.2 the Distinction between Physical and Chemical
Changes
B.3 Use Simple Kinetic Particle Theory to Explain
Changes of State, Dissolving and Diffusion
B.3 Interaction of Matter and Energy

Time allotment: Tue, March 24 – Fri, April 2, 2009

C. Methods of Separating Mixtures
C.1 Variety of Methods of Obtaining Pure Substances
from Different Mixtures
C.2 Evaporation
C.3 Filtration
C.4 Distillation

Time allotment: Tue, April 14– Fri, April 24, 2009

6 Levels of Learning

Here are the 6 levels of learning..for students and teachers as well:

1. I've heard of it-memorize the info
2. I can repeat
3. I can apply it in the same context
4. I can apply it in the different context
5. I can break it down and recognize it
6. I can teach it...

GOOD LUCK ALL!