1. The Universe Test Review Week 18

2. What is rotation? Rotation Rotation: Earth spins around its axisRotation: Earth spins around its axis 1 rotation takes 24-hours1 rotation takes 24-hours

3. What does rotation cause/create? Rotation This causes day and night because the east and west hemispheres alternate facing the sunThis causes day and night because the east and west hemispheres alternate facing the sun

4. Draw a picture of rotation and label Day and Night? Rotation Day Night

5. What is Revolution? Revolution Revolution: Earth going around the sun every 365 days

6. What causes seasons? Revolution Revolution and the tilt of the Earth on its axis

7. What causes seasons? Revolution Revolution and the tilt of the Earth on its axis

8. Label the Seasons Summer Spring Winter Fall

9. Draw a picture of the Earth, Moon, and Sun showing the Earth orbiting the Sun and the Moon orbiting the Earth.

10. Waxing Crescent First Quarter Waxing Gibbous Full Moon Waning Gibbous 3 rd Quarter Waning Crescent

11. Draw a diagram of Spring Tide with appropriate moon phases

12. Draw a diagram of Neap Tide with appropriate moon phases

13. What is the difference between Spring and Neap Tide Spring Tide: highest high tides and lowest low tides –greatest difference between high and low tide Neap Tide: Lowest high tide and highest low tide –smallest difference between high and low tide

14. Explain high and low tide. High Tide: Where the water levels rises twice a day Low Tide: Where the water level falls twice a day

15. Put the following in order from largest to smallest Universe Galaxy Solar System Sun Earth Moon

16. Galaxies EllipticalSpiral LenticularIrregular Little gas and dust between the stars This is the type of galaxy we live in Galaxy with a central bulge or bar in the middle These galaxies do not have a regular shape

17. Place a star where our sun is located

18. What is the size of our sun? Medium (G or F)

19. Where is our sun found in the Milky Way Galaxy? On the edge of a spiraled arm.

20. HR Diagram Question Which star is the hottest star? Which color, red or blue, is hotter? Which star is brighter, Sirius B or Deneb? Which star is cooler, Barnard’s Star or the Sun? Which star is less bright, Alcor or Zeta Eridani? Zeta Eridani Blue Deneb Barnard’s star Alcor

21. How do astronomers determine the elements a star of made of? By using the electromagnetic spectrum to see what elements are in the stars light by looking at the spectral lines Video: http://www.youtube.com/watch?v=5GIvktBSxvw

22. Label the EMS Short wavelengths Highest frequency Long Wavelengths Lowest Frequency Gamma Visible Light Radio

23. How do astronomers measure distance in the universe? By using light years

24. What is a light year? Light year: the distance light travels in one year 300,000 kilometers per second

25. What is the Big Bang Theory and what evidence supports it? Big Bang TheoryEvidence Most popular theory Says that at first matter was in one small area, and than it got so hot it exploded This theory suggests that everything is still expanding and growing 1.Red Shift: everything is moving away from earth meaning the universe is still Expanding 2.Cosmic Microwave background Radiation left from the Big Bang

26. Please add to your review! Life Cycle of a star Video: http://www.youtube.com/watch?v=PM9CQDlQI0Ahttp://www.youtube.com/watch?v=PM9CQDlQI0A

27. What is the life cycle of a small/medium size star? Nebulae/ Protostar/ Main Sequence Red Giant White Dwarf Black Dwarf Small/Medium Size Star

28. 4. What is the life cycle of a large star? Nebulae/ Protostar/ Main Sequence Super Giant Supernova Recycled Star Large Size Star Black Hole Neutron Star