1. axis
Grade 5 Critical Vocabulary

2. rotation Grade 5 Critical Vocabulary
satellite images of Earth as it ROTATES (taken every 10 minutes over two hours)
Grade 5 Critical Vocabulary

3. revolution
When a planet or moon travels once around an object it is considered a revolution. 
It takes one whole year for Earth to revolve around the Sun.
Grade 5 Critical Vocabulary

4. orbit All the objects in our Solar System ORBIT the Sun.
This diagram shows the ORBIT of Earth and the Moon.
All the objects in our Solar System ORBIT the Sun.
Grade 3 Critical Vocabulary

5. This picture of EARTH was taken from the Moon!
Google Earth lets you take virtual trips around EARTH using satellite images.
This picture of EARTH was taken from the Moon!
Kindergarten Critical Vocabulary

6. solar system
Grade 3 Critical Vocabulary

7. planet satellite image of Mars
There are 8 planets that orbit our Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, & Neptune.
Grade 3 Critical Vocabulary

8. MOON phases, viewed from Earth
Earth’s MOON
MOON phases, viewed from Earth
Grade 2 Critical Vocabulary

9. star Grade 1 Critical Vocabulary
A STAR with a planet in very close orbit, about 880 light years from Earth
All of the objects in our solar system orbit one STAR, the Sun. Our galaxy alone contains about 200 billion stars!
Grade 1 Critical Vocabulary

10. Sun Our SUN powers the Water Cycle. satellite image of our SUN
Kindergarten Critical Vocabulary

11. patterns
SPRING
SUMMER
FALL
WINTER
Kindergarten Critical Vocabulary

12. season
Grade 2 Critical Vocabulary

13. tide Grade 4 Critical Vocabulary HIGH TIDE LOW TIDE
When one shore of an ocean has high TIDE, its other shore has low TIDE.
Grade 4 Critical Vocabulary

14. gravity
When a ball is tossed in the air, GRAVITY acts upon it, pulling it toward Earth.
Grade 3 Critical Vocabulary

15. model
Grade 2 Critical Vocabulary