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Grade 4 Science · World 2: Star Gazers' Observatory · Level 14
Rocky and Gas Planets
Compare the planets' sizes and sort them as rocky or gaseous.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 14
- The planets come in two kinds. The four nearest the sun, Mercury, Venus, Earth, and Mars, are small and rocky, with solid ground.
- The four outer planets, Jupiter, Saturn, Uranus, and Neptune, are giants made mostly of gas. You couldn't stand on them!
- Here they are drawn to size. Jupiter is the biggest, about 11 times as wide as Earth. Mercury is the smallest.
- Each planet has its own look: Mars is red, Jupiter has stripes and a giant storm, Saturn has bright rings, and Neptune is deep blue.
Georgia Standards of Excellence in Science:
- S4E1.d — Evaluate strengths and limitations of models of our solar system in describing relative size, order, appearance and composition of planets and the sun. (Clarification statement: Composition of planets is limited to rocky vs. gaseous.)