Exam 1 Part 2 Flashcards
(49 cards)
Nuclear reactions burn hydrogen into…
Helium (loss mass and release energy)
Absorbed solar energy
(E^absorb)
Inside the core the particle density and temperature are so high, that…
Individual protons ram into each other at sufficient speed to forming heavier He atoms and releasing energy
The current age of the Sun is determined from….
Radioactive dating of the oldest objects in our solar system
The time from now to “die” of Sun…
The time runs out all energy generated in the core of sun by Thermonuclear reactions
Lifetime…
Total available energy/heat flow rate at surface luminosity
Heat flow rate
Solar luminosity/energy released per second
3.8 X 10^26 W
Lifetime (T)
Total energy/heat flow rate
T = E/Ls
Earths only satellite
Moon
Size, density, mass, and gravity
Diameter = 3500 km
Average density = 3360 kg/m^3
Mass = 7.35×10^22 kg
Surface gravity = 1.62m/s^2
Large day – night temperature difference
Surface temperature (day) = 380 K (107 C) Surface temperature (night)= 120 K (-153 C)
Low albedo (reflectivity)
Average = .1
Tidal locking (Always one side facing to earth)
Orbital period = 27 days
Rotational period = 27 days
There are so many craters on the surface of the moon with varying sizes because…
Little atmosphere and no plate tectonics
Highland (Bright area) can be…
7.5 km
Mare is flat and young lowland, which is covered by
Lava
Daytime surface temperature of the moon is…
107°C
Every 27 days all surface of the moon is exposed to the sun…
High daytime temperature will evaporate liquid/solid water
The Indian moon spacecraft provided evidence of…
Icewater on surface
Where does this ice water come from?
Comets
Crust and mantel are both responsible for…
Tectonics, earthquakes, and volcanoes
Outer core is related to the….
Magnetic field of the earth
The crust of the Earth is broken into many pieces called…
Plates
Boundaries of plates rarely correspond to the boundaries of…
Oceans and continents
