Science
Space Systems & Earth's History
Conceptual
11–12 yrs
The solar system (age 11+)
太阳系（11岁以上）
Description
Describe the detailed structure of the solar system, including moons, asteroids, and comets, compare orbital periods and distances of the planets, and distinguish between planets, dwarf planets, and other bodies
Mastery Evidence
- Names the eight planets in order and gives one distinguishing fact about each
- Describes the difference between a planet, a dwarf planet, an asteroid, and a comet
- Explains the relationship between distance from the Sun and orbital period (planets further out take longer)
Assessment Prompt
If your child was making a model of the solar system, could they describe the difference between a planet, a moon, an asteroid, and a comet — and explain why planets closest to the Sun take less time to complete an orbit?
