1. The sun, moon, and stars illustrate patterns of apparent motion. Models explain apparent patterns of motion of the sun, moon, and stars. (ESS1.A)
1a. What is apparent motion? 1b. What do you notice about the apparent motion of the sun and the moon and stars over time? 1c. What real motion is causing this apparent motion to occur?1c. How have models explaining the patterns of apparent motion changed? 1d. Why does apparent motion influence our accepted version of a calendar?
2. Earth belongs in the Milky Way Galaxy, one of many galaxies in the universe. (ESS1.A)
2a. What is a Galaxy? 2b. What planets make up the Milky Way galaxy?2c. What are the different types of galaxies in space?2c. Why is it that Earth is the only planet that can support life? Or is it?2d. How do we get energy from the sun?
4. Gravitational pull holds objects in their orbits in space. (ESS1.)
4a. What keeps planets in orbit? 4b. What keeps people from floating away?4c. Is gravity the same everywhere? 4d. Why is gravity different on different planets?
5. Earth, moon, sun models explain eclipses of the sun and moon. (ESS1.B)
5a. What is a solar eclipse? What is a lunar eclipse?5b. How can we predict when eclipses occur?5c. Why do eclipses occur?5d. Why don’t eclipses occur every month?
6. Earth’s tilted axis and orbit around the sun explain seasons and the differential intensity of sunlight on different areas of Earth across the year. (ESS1.B)
6a. Are the seasons the same across the globe? If not, why and how are they the same and different? 6b. What is an axis?6c. How is Earth’s axis tilted?6d. How does Earth’s tilted axis affect the amount of sunlight different parts of Earth receive?6e. Why do seasons change around the same time each year?