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# Unit 4: Modeling energy

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## About this unit

How high can you jump on that trampoline? Sure, you could just start hopping around, but physics gives us a safer option. Use your knowledge of energy, you can mathematically model energy of an object or system, such as a spring, to predict how systems will behave.

Push down on a spring until you can't anymore; how much energy is stored in there?

If energy can't be destroyed, then how come I'm so tired all the time?

### Practice

- Understand: energy in systemsGet 3 of 4 questions to level up!
- Apply: energy in systemsGet 3 of 4 questions to level up!

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

Energy can't be created or destroyed, but it's also not limitless: a bouncing ball can't bounce forever!

### Learn

### Practice

- Understand: predictions using energyGet 3 of 4 questions to level up!
- Apply: predictions using energyGet 3 of 4 questions to level up!

Fighting the inevitable—why does your dinner get cold and your ice cream melt?

### Learn

### Practice

- Understand: thermodynamicsGet 3 of 4 questions to level up!
- Apply: thermodynamicsGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 320 Mastery points

Up next for you:

Level up on all the skills in this unit and collect up to 700 Mastery points!