Name:______
Introduction to Space Quiz Study Guide (Academic)
1.What unit of measurement is used to measure the distance of galaxies or stars?Light Year
2.Where is our solar system located within our galaxy?2/3 on the spiral arm
3. What is a light year? Distance light travels in one year
- What do light years measure? Distance in space
- Where is our solar system located within our galaxy?2/3 on the spiral arm
- What is a nebula?A cloud of gas and dust in outer space
- What are the 3 types of galaxies?Elliptical, Spiral, & Irregular
- The 3 types of galaxies are based on their what?Shape
- What is a galaxy?A system of billions of stars, dust, and gas held together by gravity
- The Sun is a what?Star
- How would you describe the Milky Way Galaxy?It is a spiral galaxy that contains our solar system with about 2 billion stars
- What kind of stars are mainly found in elliptical galaxies? Old stars
- What is the estimation of stars within a galaxy? Over a billion
- Where are the young and old stars located in a spiral galaxy?
Young stars are located on the arms and old stars are located towards the center.
- Describe and illustrate red shift. (Give 2 facts + illustration)
Redshift moves away and have longer wavelengths (expanding)
- Describe and illustrate blue shift. (Give 2 facts + illustration)
Blueshifts moves closer and have shorter wavelengths (contracting)
- How do scientist estimate the age of stars?By looking at the brightness and the color
18. The more distant galaxies are, the ___faster_____ they move which leads us to believe that the universe is still ____expanding______.
19. What force holds galaxies together?gravity
- How far from Earth is an object that is 20 light years away from Earth?
The distance light travels in 20 years
- By looking at the light of a star, what 3 things can you determine?
- color & brightness
- age
- what elements formed
- temperature
- Illustrate and name the 3 types of galaxies.
IrregularSpiralElliptical