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Science - 5th Grade
Standard 3 Objective 1
The purpose of this activity is to teach writing in a science context using the text structure of compare and contrast.
It is assumed that Introducing Text Structures in Science activity has already been taught using descriptive text structure examples. This lesson is intended to be a model lesson and is not expected to be the only occasion where students write compare and contrast texts in science. The principles taught in this lesson may be adapted for use in any of the Science Core Curriculum Objectives where compare and contrast is emphasized. The use of the verb compare in the Core Curriculum signals that this text structure will be useful.
This activity is intended to mesh with the activities about permanent
magnets and electromagnets found in Standard III. Students will write
about the similarities and differences of these magnets. This activity
should be used after students have had several experiences with
permanent magnets and electromagnets. For information about
permanent and electromagnets, consult the Teacher Resource Book.
Note: During these activities, an emphasis should be placed on the observations that are needed to report effectively.
1. Use Science Process and Thinking Skills
3. Understand Science Concepts and Principles
4. Communicate Effectively Using Science Language and Reasoning
Invitation to Learn
Review the permanent and electromagnets students have experimented with. Recall some of the experiments the class has done with the two kinds of magnets. Discuss how the two kinds of magnets are alike and different.
Have a magnetic field
Attract iron and steel
Have a N and S Pole
Cannot be turned off and on
Loose magnetism if dropped
Magnetic field is
strengthened if stroked by
a stronger magnet
Must connect to an electrical circuit
Stronger if electricity increased
Keep a constant amount of strength
Can be turned off and on