space physics Flashcards
1
Q
what causes summer and winter
A
when N hemisphere is tilted towards the sun = summer
when S hemisphere is tilted away from the sun = winter
2
Q
phases of the moon
A
sun gives off light
- object reflects the light
- when we see the moon, light is reflecting off the sun
3
Q
comets
A
dust + ice
elliptical orbits
- train always point away from the sun
- travel fastest when closest to the sun - gravitational pull
4
Q
4 inner planets
A
mercury, Venus , earth ,mars
smaller - composed of metal and rocks
5
Q
4 outer plants
A
- Jupiter , Saturn , Uranus , Neptune
- larger, composed of gas
6
Q
protostar
A
an interstellar cloud collapsing, increasing in temperature as a result of its internal gravitational attraction
7
Q
star facts
A
2 elements : hydrogen , helium
- radiates its energy
infrared, visible , uv
