Objective: SWBAT describe the motion of magnets by modeling magnetic field lines in attracting and repelling magnetic systems.
Do Now:
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Question 1
1.
What happens to the compass needle as you move the compass around?
Guided Notes:
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Question 2
2.
Magnetic field lines:
The pattern of magnetic field lines around attracting magnets is different from the pattern of magnetic field lines around repelling magnets.
always travel from north to the nearest south
allow scientists to predict the movement of magnets
Allow scientists to predict strength of magnetic forces.
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Question 3
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Practice
Practice:
Amplify Science
Unit 4: Magnetic Fields
Chapter 1: Modeling Magnetic Force
Lesson 1.5: Investigating Magnetic Field Lines
Activity: Simulation
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Question 4
4.
Repelling: What do magnetic field lines look like when two magnets repel? (check one)
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Question 5
5.
Sketch a magnetic field line pattern that represents a repelling magnetic force.
Include two magnets that are drawn and correctly labeled North, South
Include magnetic field lines with arrows going the correct direction
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Question 6
6.
What do magnetic field lines look like when two magnets attract? (check one)
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Question 7
7.
Sketch a magnetic field line pattern that represents an attracting magnetic force.
Include two magnets that are drawn and correctly labeled North, South
Include magnetic field lines with arrows going the correct direction
Exit Ticket:
Magnetic forces like those caused by Earth’s geomagnetic field may seem mysterious. These forces act on objects at a distance, and we can’t see or touch them. To help visualize magnetic forces, scientists model them using magnetic field lines. These scientific models help scientists predict and explain how magnetic forces work. In a model of a single magnet, lines are drawn looping outward between opposite magnetic poles.
In a model with more than one magnet, the field lines are sometimes drawn connecting opposite poles on the magnets. These field lines help predict the direction of the forces pulling or pushing different magnets. A model showing field lines connecting the opposite poles of different magnets indicates that the magnets will be attracted together. A model showing two magnets that are not connected to each other by field lines indicates that the magnets will repel each other.
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Question 8
8.
How are magnetic field line models helpful?
CFS:
Accurately describes the relationship between magnetic field lines and the movement of magnets
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Question 9
9.
How do you think the number of magnetic field lines is related to magnetic force?
CFS:
Accurately describes the relationship between magnetic field lines density and magnetic energy in a system