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# Unit 2: Forces at a distance

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## About this unit

Why does the moon orbit around the earth? How does a compass work? Here, you'll learn about forces that occur across a distance when objects are not touching each other. Explore gravitational, magnetic, and electric forces, how they affect objects, and how electromagnetism can be used to create magnets and electricity.If everything has gravity, why don't objects orbit me?

### Learn

### Practice

- Understand: gravitational forcesGet 3 of 4 questions to level up!

Why do my socks stick together when I take them out of the dryer?

### Practice

- Understand: electric forcesGet 3 of 4 questions to level up!

It's true, opposites attract! If they're magnetic poles.

### Practice

- Understand: magnetic forcesGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 240 Mastery points

How can Earth keep the Moon in orbit if they never touch?

### Learn

### Practice

- Understand: fieldsGet 3 of 4 questions to level up!

Magnets are much more useful when you can turn them on and off.

### Practice

- Understand: electromagnetismGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 160 Mastery points

Up next for you:

Level up on all the skills in this unit and collect up to 500 Mastery points!