Q1
The planet closest to the Sun is:
AMercury
BEarth
CVenus
DMars
CBSEClass 6 (CBSE)ScienceCh 12 · Topic 1
Our Solar System
Learning about the Sun and the planets that orbit it.
Core concept
Planets are divided into two groups: the inner, rocky planets (Mercury, Venus, Earth, Mars) which are smaller and closer to the Sun, and the outer, gas/ice giant planets (Jupiter, Saturn, Uranus, Neptune) which are much larger and farther away. An asteroid belt, made of rocky debris, lies between Mars and Jupiter. Beyond Neptune lies the Kuiper Belt, home to dwarf planets like Pluto, which was reclassified from a full planet to a dwarf planet in 2006.
Exam highlight
Key diagram
- Show a labeled diagram of the solar system with the Sun and eight planets in order.
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Quick notes
• Eight planets orbit the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
• Inner rocky planets: Mercury, Venus, Earth, Mars. Outer gas/ice giants: Jupiter, Saturn, Uranus, Neptune.
• Earth is the only known planet to support life.
• Pluto was reclassified as a dwarf planet in 2006.