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Unit 2: The Earth-sun-moon system
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About this unit
In this unit, you'll explore the inner workings of the Earth-sun-moon system. Discover the secrets of our seasons, learn why the moon waxes and wanes, and find out what causes the stunning spectacle of a solar eclipse.
Why is it summer in Chile when it's winter in the US?
Practice
- Understand: seasonsGet 3 of 4 questions to level up!
Can't see the moon at night? Don't worry, it's just a phase.
Learn
Practice
- Understand: the moon and its motionsGet 3 of 4 questions to level up!
- Apply: the moon and its motionsGet 3 of 4 questions to level up!
Put down your sunscreen—it's a total solar eclipse!
Practice
- Understand: solar eclipsesGet 3 of 4 questions to level up!
Make science come alive in your classroom with free hands-on investigative activities aligned to middle school NGSS standards.
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Level up on all the skills in this unit and collect up to 400 Mastery points!