ACT Preparation / Unit 22 ACT 2126 short lesson, about 20 seconds
The Solar System
Captions available
The idea
The four planets closest to the sun, Mercury through Mars, are small, rocky terrestrial planets. The next four, Jupiter through Neptune, are giant planets made mostly of light ices, liquids and gases.
In practice
Earth and Mars are terrestrial; Jupiter and Saturn are giants.
Where people slip
In order outward from the sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- Nothing yet depends on this.
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