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Tides (2 days)
Big Idea
Gravity holds Earth in orbit around the sun, and it holds the moon in orbit around Earth. The pulls of gravity from the sun and the moon cause the patterns of ocean tides. (K-12 Framework: ESS1.B)
Essential Questions
  • What causes tides?

Explain the interrelationship between the Earth's tides and the Moon.
Science & Engineering Practices
  • Developing and Using Models:  students model the Sun, Earth and the Moon system to understand tides.
Content/Core Ideas
  • The gravitational pull between the moon, Earth, and sun cause tides. There are two high tides and two low tides in each day.
Crosscutting Concepts
  • Patterns
  • Scales, Proportions, and Quantity
  • Systems and System Models
Learning Practices
CC:7.W.2  Journal--Construct an explanation for the cause of tides. Identify and cite textual evidence. Model the sun, Earth, and the Moon system that causes tides.
Academic Vocabulary
  • gravity
  • high tide
  • low tide
  • neap tide
  • spring tide