- If a star's measured brightness at 2 light years is 16,000 candela, what would it be at 4 light years?
Your answer:
8,000 candela
4,000 cd
1,000 cd
64,000 cd
- A star's measured brightness at 2 l-y is 16,000 cd (still). What would it be at 1 l-y?
Your answer:
32,000 cd
20,000 cd
64,000 cd
160,000 cd
- How far away is the closest star to Earth?
Your answer:
About 4 light-years
About 8 light-minutes
About 15 light-hours
Just over 250,000 miles
- What will happen to the light spectrum for the light from a galaxy moving away from Earth?
Your answer:
It stays about the same.
It exhibits (shows) a blue shift.
It exhibits a red shift.
It gets very, very bright. But only at night.
- Who discovered the expanding universe and proposed the Big Bang Theory?
Your answer:
Henrietta Swan Leavitt
Albert Einstein
Christian Doppler
Edwin Hubble
- How does the wavelength of a wave change as the source moves toward the observer?
Your answer:
It decreases.
It increases
It stays the same.
It varies with the Cepheid altamoron.
- The reason the sun is brighter than other stars is because __________________ .
Your answer:
It is brighter than most other stars at the same distance.
It's very close to Earth.
It is hotter than most other stars.
All of the above.
- How does a yard compare to a meter?
Your answer:
A yard is about 3 inches shorter.
A meter is about 3 inches shorter.
A meter is almost triple the size of a yard.
There are 100 yards in a meter.
- How many decimeters are in a meter?
Your answer:
10
one-tenth
100
one-hundredth
- What is the name for the prefix that means "one billionth"?
Your answer:
Milli-
Micro-
Giga-
Nano-