1. SPACE

2. Space

5. Gravity
Gravity is a force that keeps the planets in motion around the sun
Gravity acts everywhere in the universe

6. 1

7. Rotation
Spin on an axis
Causes day and night

8. Revolution
Orbital motion of a planet around the sun
1 year

9. 1 year, 365 days, or 12 months

10. Rotation or spinning

11. Moon phases

12. 3

13. Tides

14. 2

15. 3

16. Seasons
December
June

17. 2
Which diagram best represents the tilt of Earth’s axis in December?

18. Ptolemy
Earth was the center of the Universe
geocentric

19. Aristotle Geocentric model
the planets and stars were perfect spheres but Earth was not
thought that the movements of the planets and stars must be circular 

20. Copernicus
Heliocentric
Determined Earth rotates on its axis

21. Galileo
Telescope

22. asteroid a small rocky body orbiting the sun
Most are found between Mars and Jupiter

23. Meteors
streak of light in the sky ("shooting star“) produced by the entry of a small meteoroid into the Earth's atmosphere

24. comet
a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun

25. moon
or moon, is a celestial body that orbits another body

26. 4

27. Rocketry History Sputnik 1957 Explorer 1 1958 Apollo 1967
Apollo first moon landing
Space Shuttle –1981
Reusable space craft

28. Artificial Satellites
human-built objects orbiting the Earth and other planets in the Solar System
used to study the Earth, other planets, to help us communicate, and even to observe the distant Universe
Sputnik 1
Explorer 1
GOES (geostationary)
Hubble Space Telescope
International Space Station

29. Missions to the Moon 1959 Luna did a flyby
1969 Apollo 11 landed on the moon
1972 last Apollo mission to the moon

30. Mars Robotic Exploration
Spirit: 2004, studied rocks and minerals to determine if there was ever life on Mars
Phoenix Mars Lander: 2008, looking for the presence of water
Curiousity: 2012, studied if Mars is suitable for life