|Physical Science||Electricity/Magnetism 2B2.00||Process Of Science||Explaining 1.5 a|
CONTENT STANDARD: Physical Science
CONTENT TOPIC: Electricity and Magnetism
CONCEPT: Magnets vary in size, strength, shape, composition, and use.
CONTENT OBJECTIVE: 2B2.00 To understand the fundamentals of magnetism
INSTRUCTIONAL OBJECTIVES: The learner will:
TN COMPONENT OF SCIENCE: Process Of Science
BENCHMARK: Graphs and tables provide visual results of observations
Each group has a teacher-prepared observation guide to record data. For example:
Center 1: predicted outcome/actual outcome
Center 2: predicted outcome/actual outcome, etc.
After students have completed the activity at each center, class should discuss data. The data is used to make a graph to illustrate the results.
Compare and contrast predictions and actual outcomes. Order the magnets by strength from the strongest to the weakest.)
1. Set up a center with various magnets and objects available for the students to explore.
2. Look at the magnets and draw them on your paper.
3. Make a temporary magnet: Rub an iron nail at least 50 times with a magnet. Be sure to rub the nail in the same direction. Try to pick up a paper clip. If the magnet will not pick it up, repeat the directions.
4. Have students bring in magnets from home to share.)
This classroom connector addresses Instructional Objectives 2.03, and 2.04.
In our last lesson, you learned that magnets can vary in strength, size, and shape. Today, you will learn the strongest parts of a magnet and how they are special.
The space around a magnet is called the magnetic field. (Have a demonstration using two children standing far apart. One child holds a magnet, the other holds a paper clip.) Why isn't the paper clip sticking to the magnet? (They are too far apart.) Have them move slowly towards each other until the paper clip is attracted to the magnet. The paper clip must be within the MAGNETIC FIELD to stick to the magnet.
1. Give each group of students a bar magnet and paper clasps. Let them observe how most of the clasps stick to the ends. Take another bar magnet and bring the north pole of one magnet near the south pole of another magnet. The poles will pull towards each other or attract. Place the north pole of one magnet near the north pole of another magnet. The poles will push away or repel. Unlike poles will attract. Like poles will repel.
2. Place a bar magnet on a table at each group. Put a sheet of paper over the magnet. Sprinkle iron filings on the paper. Tap the paper gently. What happens? Lines form to show the magnetic field. Put another magnet under the paper. Make sure the poles are together. Tap the paper. What happens? Filings between the magnets should be veering away from each other. Change the magnets so that poles are unlike. Tap the paper. Observe the new pattern. Fillings between the magnets are pulling toward each other.)
This is the time this file has been accessed since 04/20/97.
The University of Tennessee at Martin is not responsible for the information or views expressed here.
Second Grade Science Home Page