Astronomy 2 Unit Checks

1. 1
UNIT CHECK
1. Nuclear reaction that involves the splitting of an
atom
2. means of energy transfer between the sun and
the Earth (heat & light)
3. Nuclear reaction that involves combining two
atoms together
4. cloud of dust & gas in space
5. In what phase is our Sun in?
6. form of energy that can be reflected or radiated
through space; no matter is involved
nebula nuclear fusion thermal radiation
Main sequence nuclear fission
electromagnetic radiation
Electromagnetic radiation
Thermal radiation
Nuclear fusion
Nebula
Main sequence
Nuclear fission

2. 2
Name the Milankovich Cycle described:
1. Earth’s orbit changes from its elliptical shape;
100,000 yrs
2. Changes in tilt causes strength of seasons
26,000 years (wobble)
3. Rocking motion in the earth’s rotation wobble
due to the Earth-moon barycenter dance
4. What is the shape of the Earth?
5-7. Which heats faster?
• Ocean or air above it?
• Ocean or land?
• Air or land?
Nutation precession eccentricity oblate spheroid
UNIT CHECK
eccentricity
precession
nutation
Oblate spheroid
air
land
eccentricity
land

3. 3
LABEL
A.
B.
What does the interaction of solar wind with Earth’s
upper atmosphere along its magnetic field along the
poles create?
A B
UNIT CHECK
Solar wind
Magnetic field
aurora