1. Science Unit D Review
Chapter 2

2. What is bigger than the universe?
Nothing

3. Is the Local Group larger than the Milky Way?
Yes
The local group is the galactic cluster that the Milky Way galaxy is a part of.

4. What type of galaxy is the sun located in?
Spiral

5. How does the sun’s energy travel?
In waves

6. The sun’s atmosphere is in the _____.
corona
Remember- this is only visible during an eclipse.

7. The apparent magnitude of a star is how bright it ___________.
Appears

8. What is the hottest part of the Sun?
The Core

9. What is a dark area on the Photosphere?
Sunspot

10. The absolute magnitude is how bright a star ___________ is.
Actually

11. The ______ is a fast-moving stream of particles ejected into space.
solar wind

12. Name the 4 stages of a stars life in order.
Nebula
Protostar
Red Giant
White Dwarf

13. How does the sun produce energy?
Fusion
The process of hydrogen atoms colliding together to produce helium.

14. A ______ is a brief burst of energy that occurs above a sunspot.
solar flare

15. Two stars the same distance from Earth that give off the same amount of light will appear to have the same ________.
magnitude

16. The sun’s ______ is the layer we see.
photosphere

17. The classification group to which most stars belong is the _________.
main sequence

18. A group of stars, gas, and dust would form a ______.
galaxy

19. A _____ is the distance light travels in one Earth year.
light year

20. Your Place in Space Earth Solar system Milky Way Galaxy Local Group
Universe

21. At the center of the solar system is a…
Star

22. The surface of the sun is the part we can see. It is called the…
photosphere

23. Sunspots can cause brief bursts of energy known as solar-
flares

24. The sun is a huge mass of…
gases

25. The hottest stars in the main sequence are also the…
brightest

26. The Milky Way Galaxy is located in the Local Group, which is a __________
galactic cluster

27. What type of galaxy is shown in the illustration?
spiral

28. Name the 4 types of galaxies.
Spiral
Barred spiral
Elliptical
Irregular

29. How is the sun responsible for fossil fuels?
Organisms that died long ago depended on the sun for energy.

30. What happens in the convection zone of the sun?
Cooler particles are pulled down