The inner planets Mercury, Venus, Earth, and Mars are described. Mercury is about 40% the size of Earth, has almost no atmosphere, and has long days and years compared to Earth. Venus is similar in size to Earth but has a dense carbon dioxide atmosphere and intense heat due to greenhouse gases. Mars is about 3/4 the size of Earth, has an iron oxide surface that makes it appear red, may have once supported liquid water, and has the moons Phobos and Deimos.

1. THE INNER PLANETS

3. MERCURY
 About 40% the
size of earth

4. MERCURY
 Hardly has an atmosphere

5. MERCURY
 Just like the moon!

6. MERCURY
 Mercury Day: 59 earth DAYS to rotate
 Mercury Year: 88 earth DAYS

8. VENUS
 Earth’s Evil Twin

9. VENUS
 Deadly carbon dioxide atmosphere

10. HOTTER THAN MERCURY!
 Why?

11. VENUS
 The clouds are full of sulfuric
acid!

12. VENUS
 Venus Day: 243 Earth days
 Venus Year: 224 Earth days
WHAAT???

14. EARTH 
 It’s the only planet that supports
life.

15. EARTH 
 It has a breathable atmosphere
made out of mostly nitrogen and
oxygen.

17. MARS
 About ¾ the size of earth

18. MARS
 Red planet = iron?

19. MARS
Mars probably used to have water.
It still has plenty of ice.

20. MARS
Mars probably used to have water.
It still has plenty of ice.

21. MARS
Mars Day: 24.5 hours
Mars Year: 687 days

22. MARS
Phobos & Deimos: So cute!

23. MARS
COULD THERE BE LIFE ON
MARS?