1. What are the inner planets?
The four planets closest to the sun are known as the inner planets. Mercury, Venus, Earth, and Mars

2. Mercury
This picture of Mercury was made by joining many smaller photos taken by Mariner 10. No photos were taken of the area that looks smooth.

3. Mercury Mercury is the planet closest to the Sun.
It is a small planet, a little bigger than Earth’s moon.
Mercury is covered with thousands of dents. The dents are shaped like bowls and are called craters.
Craters were made when meteorites crashed into Mercury’s surface long ago.

4. Venus

5. Venus Venus is the second planet from the Sun.
It is about the same size as Earth, but Venus turns in the opposite direction.  
Like Mercury, Venus is very hot and dry.
Unlike Mercury, Venus has an atmosphere made of thick, swirling clouds.

6. Using the chart, What is one reason people cannot live
on Mercury or Venus?
They are both too hot to live on!

7. Using the chart, how much longer is Venus’ Earth year?
137 years longer

8. Earth

9. Earth Earth, our home, is the third planet from the Sun.
It is also the solar system’s largest rocky planet.
Earth is the only planet that has liquid water on its surface. In fact, most of Earth’s surface is covered with water.
Earth is the only planet in the solar system known to support life.

10. Earth’s Moon

11. Earth’s Moon Moons are satellites of planets.
A satellite is an object that orbits another object in space.
Just as planets revolve around the Sun because of gravity, moons revolve around planets.
Earth has one large moon.
The diameter of the Moon is about one-fourth the diameter of Earth.

12. Mars

13. Mars The fourth planet from the Sun is Mars.
The rocks and soil that cover much of Mars contain the mineral iron oxide.
This mineral is reddish-brown in color. It is the same material that makes up rust.
This has given Mars its nickname, the "Red Planet."

14. How much lighter is a 100 pound person on Mars?
62 pounds

15. It is farther from the sun.
Why is the average surface temperature considerably lower on Mars compared to Earth
It is farther from the sun.

16. The Four Inner Planets
Mercury
Earth
Venus
Mars

17. Let’s see how you do locating the planet!
Quiz Time!
Let’s see how you do locating the planet!

18. This Planet has an atmosphere made of thick, swirling clouds.
Find the planet
This Planet has an atmosphere made of thick, swirling clouds.
Earth
Venus
Mars

19. Oh no! Quick guess again!

20. Great Job Kids!

21. This planet is closest to the sun.
Find the planet
This planet is closest to the sun.
Earth
Mercury
Mars

22. Oh no! Quick guess again!

23. Great Job Kids!

24. This is the fourth planet from the sun.
Find the planet
This is the fourth planet from the sun.
Earth
Venus
Mars

25. Oh no! Quick guess again!

26. Great Job Kids!

27. This is the largest of the inner planets.
Find the planet
This is the largest of the inner planets.
Earth
Venus
Mercury

28. Oh no! Quick guess again!

29. Great Job Kids!