AIDE Physical Science Assignment Guide and Key Points

 

Chapter 12 "Magnets and Electromagnetism"

 

Lesson 1 "What are Magnets"

Turn to page 346-347 look at the pictures and diagrams on those pages read about it and the short introduction to Chapter 12

Visually Scan Pages 348-350; focus on the blue boxes, which contain the key vocabulary terms.

Visually Scan Pages 348-350 for pictures and diagrams, read each of the captions.

Look for and read any little blue boxes on pages 348-350

Read Pages 348-349 (take notes of important ideas)

Do you know the answers to the questions on page 350? (See Key Points below for help)

Do you know the vocabulary words? (See Key Points below for help)

Take the quiz on Lesson 1 "What are Magnets" (You may use the book, notes and Key Points for help on the quizzes. NOT ON TESTS!)

Review answers on the quiz and print it out. This will be very useful when you are studying for the test.

 

Lesson 1 Key Points

Vocabulary Terms

Magnet - an object that attracts certain kinds of metals, such as iron.

Magnetic pole - the end of a magnet, where magnetic forces are greatest.

Attract - to pull together.

Repel - to push apart.

 

Section Review Answers

  1. Place the magnet next to a marked magnet. Because opposite poles always attract and like poles always repel, the behavior of the poles will tell you the identity of the unmarked pole.
  2. They will repel.
  3. They will attract.
  4. Lodestone is a naturally occurring magnet made of iron oxide.
  5. Four familiar shapes of magnets are the horseshoe, bar, cylinder, and doughnut.

Did you learn these Objectives?

Can you describe several kinds of magnets?

Are you able to explain what magnetic poles are?

Can you describe how magnetic poles behave?

 

Lesson 2 "Identifying a Magnetic Field"

Visually Scan Pages 351-353; focus on the blue boxes, which contain the key vocabulary terms.

Visually Scan Pages 351-353 for pictures and diagrams, read each of the captions.

Read Pages 351-352 (take notes of important ideas)

Do you know the answers to the questions on page 353? (See Key Points below for help)

Do you know the vocabulary words? (See Key Points below for help)

Take the quiz on Lesson 2 "Identifying a Magnetic Field" (You may use the book, notes and Key Points for help on the quizzes. NOT ON TESTS!)

Review answers on the quiz and print it out. This will be very useful when you are studying for the test.

 

Lesson 2 Key Points

Vocabulary Terms

Magnetic field - Area around a magnet in which magnetic forces can act.

Lines of force - lines that show a magnetic field.

 

Section Review Answers

  1. A magnetic field is an area around a magnet in which magnetic forces can act.
  2. They form a pattern of curving lines around the magnet from pole to pole.
  3. The earth's magnetic field lines up the compass needle. The north pole of the magnet in a compass points north because it is attracted to the earth's magnetic pole. The pole near the geographic North Pole is actually like the south pole of a magnet.
  4. Place the magnet under a sheet of paper and sprinkle iron filings over it.
  5. The magnetic lines of force are closest near the poles.

Did you learn these Objectives?

Can you explain what a magnetic field is?

Are you able to describe Earth as a magnet?

Can you explain how a magnet works?

 Investigation 12-1 "Observing Magnetic Lines of Force"

Optional, (must complete 3 this quarter)

Contact your instructor for materials if you wish to complete this lab activity.

Follow the procedure on page 354-355

Complete the follow-up investigation quiz. (The 4questions will be the same as the four questions on P355)

 

 

Lesson 3 "Identifying Magnetism"

Visually Scan Pages 356-359; focus on the blue boxes, which contain the key vocabulary terms.

Visually Scan Pages 356-359 for pictures and diagrams, read each of the captions.

Visually Scan for an read the short articles in the blue boxes that you find on Pages 356-359.

Read Pages 356-358 (take notes of important ideas)

Do you know the answers to the questions on page 359? (See Key Points below for help)

Do you know the vocabulary words? (See Key Points below for help)

Take the quiz on Lesson 3 "Identifying Magnetism" (You may use the book, notes and Key Points for help on the quizzes. NOT ON TESTS!)

Review answers on the quiz and print it out. This will be very useful when you are studying for the test.

 

Lesson 3 Key Points

Vocabulary Terms

none

 

 

Section Review Answers

  1. The magnetic fields of atoms line up in the same direction.
  2. The magnet becomes two magnets.
  3. Heat a magnet or strike it with a hard blow.
  4. Iron, cobalt, and nickel are some materials that can be made into magnets.
  5. sample answers: wood, plastic, rubber, copper, gold, and glass are some materials that are not magnetic.

Did you learn these Objectives?

Can you explain what causes magnetism?

Are you able to describe how to make a magnet?

Are you able to describe how magnetism is destroyed?

Can you list materials that are attracted by magnets?

 

Lesson 4 "The Relationship Between Magnetism and Electricity"

Visually Scan Pages 360-366; focus on the blue boxes, which contain the key vocabulary terms.

Visually Scan Pages 360-366 for pictures and diagrams, read each of the captions.

Visually Scan for an read the short articles and questions in the blue boxes that you find on Pages 360-366.

Read Pages 360-365 (take notes of important ideas)

Do you know the answers to the questions on page 366? (See Key Points below for help)

Do you know the vocabulary words? (See Key Points below for help)

Take the quiz on Lesson 5 "The Relationship Between Magnetism and Electricity" (You may use the book, notes and Key Points for help on the quizzes. NOT ON TESTS!)

Review answers on the quiz and print it out. This will be very useful when you are studying for the test.

 

Lesson 4 Key Points

Vocabulary Terms

Electromagnetism - the relationship between magnetism and electricity.

electromagnet - a temporary magnet made by passing a current through a wire wrapped around an iron core.

a device that converts electrical energy into mechanical energy

 

 

Section Review Answers

  1. Electro magnetism is the relationship between magnetism and electricity.
  2. A current is passed through a wire wrapped around an iron core.
  3. You may have said speakers, telephones, earphones, or devices with motors.
  4. The changing poles in a motor's electromagnet are alternately attracted and repelled by the poles o a permanent magnet, causing the motor to turn. This motion can be used to operate a device.
  5. Because the direction of the current changes, the poles reverse and north would be opposite of its present position.

Did you learn these Objectives?

Can you explain how magnetism and electricity are related?

Are you able to describe electromagnetism?

Can you list devices that use electromagnetism?

Are you able to explain how magnetism can be produced from electricity?

Investigation 12-2 "Constructing an Electromagnet"

Optional, (must complete 3 this quarter)

Gather the materials you need for this lab activity: safety glasses, copper wire. .5m long, large nail, metric ruler, electrical tape, 1.5 volt D-cell battery, paper clips, iron filings, sheet of paper.

Follow the procedure on page 367-368

Complete the follow-up investigation quiz. (The 2 questions will be the same as the two questions on P355)

 

 Preparing for Chapter 12 Test

Turn to Page 369 and read the Chapter 12 summary.

On pages 370-371 you will find the Chapter 12 review, complete the review.

Check your answers with those in the Key Points.

Take the Chapter 12 Test "Magnets and Electromagnetism"

Review the answers then print the results for your records.

 

Chapter 12 Review answers

  1. motor
  2. electromagnet
  3. magnetic field
  4. lines of force
  5. attract
  6. magnetic poles
  7. electromagnetism
  8. repel
  9. B
  10. D
  11. D
  12. B
  13. A regular magnet is constantly magnetized. An electromagnet can be turned off by stopping the flow of current through the coiled wire.
  14. You can make a magnet by striking an iron wire in one direction with a magnet. You can destroy a magnet by heating it or striking it with a hard blow.
  15. Each piece would be a complete magnet with a north and a south pole. Each piece would still contain atoms lined up in the same direction.

 

Congratulations you finished the twelfth

chapter !!