This US space mission was the first time any human being walked on the moon.
What is Apollo 11?
100
The more craters there are on a surface, the ____________ it is.
What is older?
100
A dark region that has lower temperatures than the rest of the photosphere.
What is a sunspot?
100
For terrestrial planet formation, it was possible for grains to begin sticking together when collisions were ___________.
What is slow?
100
Defn: Change of Speed/Time
What is acceleration?
200
This method is used to figure out the age of rocks (and was used to help determine how old the moon is).
What is radioactive decay?
200
_______________ is unusually geologically active compared to the other planets.
What is Earth?
200
Combining two atomic nuclei at a high temperature to form a heavier, more massive nucleus, and is always accompanied by release of energy.
What is thermonuclear fusion?
200
When the Jovian planets were forming, they began by forming huge, massive, icy cores. After, they gravitationally attracted ____________ and ____________.
What are hydrogen and helium?
200
Defn: (Mass x (Radius)^2)/Spin Period
What is angular momentum?
300
This is the most feasible theory about how the moon was formed (general description okay).
What is an impact by a Mars-sized object?
300
This is the measure of random motion within a material.
What is temperature?
300
When something rotates faster at the equator than at the poles (magnetic field lines arise because of this).
What is differential rotation?
300
The coming together and cohesion of matter under the influence of gravitation to form larger bodies.
What is accretion?
300
Defn: For every action there is an equal and opposite reaction
What is Newton's third law?
400
Apollo missions determined that the age of the Moon is ___________, but that the age of the dark Mare basins were only as old as _____________.
What are 4.6Gyr, and 3.8Gyr
400
This is the process when one larger, unstable nucleus falls apart into two smaller nuclei.
What is nuclear fission?
400
This opposition between charged particles is overcome by nuclear force when smaller particles are able to fuse into larger particles.
What is electromagnetic repulsion?
400
Early in terrestrial planet formation, there are many relatively large plantesimals with _______________ orbits.
What are criss-crossing?
400
Defn: Energy can be converted into different forms, but not created or destroyed
What is Conservation of Energy?
500
The moon is less dense than Earth because it is deficient in ____________. Because of this, we hypothesize the moon formed from part of the earth's crust and mantle, but not its core.
What is iron?
500
Photons “random-walk” from core to Sun’s surface
What is radiative diffusion?
500
Convection of this material occurs below the photosphere, and is suppressed when magnetic flux tubes occur (when magnetic fields create loops up above the photosphere as a result of differential rotation).
What is ionized gas?
500
When bodies exert a regular, periodic gravitational influence on each other and it leads the system to become stable (orbital periods are related by ratio of two small integers)
What is mean motion resonance?
500
Defn: (Gravitational Constant x Mass of Object 1 x Mass of Object 2)/(Distance between Objects)^2)