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How can you unlock a door using a magnet?
Invisible Forces Unit | Lesson 5 of 5

How can you unlock a door using a magnet?

Invisible Forces Unit | Lesson 5 of 5
Lesson narration:
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DISCUSS:

Can you think of any other properties of magnets that might be useful?

DISCUSS:

What property of magnets makes them useful for making trains hover?

DISCUSS:

How could we use this property of magnets (pushing and pulling at a distance) to create something useful? Do you have any ideas?

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attract


1 of 8

to pull toward

repel


2 of 8

to push away, such as when two magnets with the same poles face each other

magnet


3 of 8

an object that can attract or repel certain materials, often metals

property


4 of 8

something you can observe about an object or material
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design


5 of 8

to make a plan for creating or doing something
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engineer


6 of 8

a person who uses science to come up with solutions to problems
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observe


7 of 8

to pay close attention to something

model


8 of 8

a pretend version of something that scientists use when the real thing is too big, small, or complicated to work with
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Lesson narration:

Grade 3

Forces, Motion, & Magnets

Magnets & Engineering

3-PS2-4, 3-5-ETS1-1, 3-5-ETS1-2

6547 reviews

Activity Prep

Print Prep
In this lesson, students investigate magnetic attraction and repulsion. In the activity, Invent a Magnetic Lock, students apply their scientific ideas about magnets to create a useful product: a magnetic lock that can open a paper door. Students engage in the engineering design process to test and improve their designs.
Preview activity

Exploration

17 mins

Grade 3

Forces, Motion, & Magnets

Magnets & Engineering

3-PS2-4, 3-5-ETS1-1, 3-5-ETS1-2

6547 reviews
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Forces Lesson 5: How can you unlock a door using a magnet?

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