Please help me out, see if any of my answers are right. I'm usually really good with astronomy, but right now it's just too much
. I'm tired and stressed.
I appreciate it, to anyone who helps.
1. What exactly is expanding the universe?
A. distances separating the galaxy clusters
B. (MY ANSWER) distances separating the planets in our solar system
C. individual galaxy and galaxy clusters
D. atoms, rocks, and planets
2. Astronomers are able to measure changes in the rate of universe expansion by observing which of the following
A. distant nebulae
B. black holes
C. (MY ANSWER) distant supernovae
D. cosmic microwave background
3. The Milky Way is an example of what kind of galaxy?
A. barred-spiral
B. unbarred-spiral
C. (MY ANSWER) elliptical
D. S0
4. Elliptical galaxies have no
A. spiral arms
B. central nucleus
C. stellar density
D. (MY ANSWER) interstellar gas
5. Protogalactic clouds that have large amounts of angular momentum may develop into ____ galaxies
A. spiral
B. irregular
C. elliptical
D. (MY ANSWER) irregular spiral
6. The ____ of the galaxies prove(s) that the cosmos is not steady and unchanging.
A. shape
B. cluster
C. (MY ANSWER) gravitational rotation
D. recessional motions
7. Which formation theory suggests that galaxies formed when massive protogalactic clouds fragmented into smaller gas clouds that then formed into individual galaxies?
A. bottom-up
B. top-up
C. (MY ANSWER) lambda dark matter
D. galaxy collision
8. Astronomers’ ever-expanding knowledge of the universe has coincided with the development of ________, a collection of indirect distance measurement techniques.
A. (MY ANSWER) the cosmic distance scale
B. the cosmic microwave background
C. light echo distance
D. differential galactic rotation
9. ______ is used to determine distances between galaxies.
A. (MY ANSWER) Hubble’s Law
B. Newton’s theory of relativity
C. The cosmological redshift
D. Euclidean geometry
10. _____ galaxies are characterized by a long stretch of stars that extends out beyond the galactic disk.
A. Elliptical
B. Barred-spiral
C. Irregular
D. (MY ANSWER) Spiral
C is almost an exact definition of what Gerrymandering is. It is the redistribution of populations within an area that will favor one political party or one political candidate.
Kinetic energy is anything that is moving, potential energy is anything that has the potential to move and then create kinetic energy. Wind blowing has kinetic energy as it is in motion.
