Science exam
gas giants
jupiter, saturn
ice giants
uranus, neptune
tirestrail planets
murcury, venus, earth, mars
our galaxy
milky way
sun is made of
H2 and He
star def
massive, lumious sphere of plasma held by gravity Ex. Sun
planet def
large sperical objects that orbit a star-sun
mass def
the amount of matter an object contains measured in kgs
gravity def
an attractive force that effects everything with mass
what are the two things gravity depends on
the mass of object and diffrence between
galaxy def
large system of stars dust and gas
moon def
a natral satilite
astroids def
small rocky objects thag orbit the sun
metirorites def
fragments of astriods or comets which are icy particals that suvive passage through earth
satilites def
objects that orbit planets
what are the two types of satilites
natral or man made
revolution
earths orbit around the sun 365.25 days (1 year)
rotation
spinning on axis full rotaition takes 24 hours (1 day)
earths axis is on a ... degree tilt
23.5
how is day and night caused
due to earths rotation at any one time half of the earthis in sunlight becasue itnis facing the sun and the side away from the sun is experiencing night
where is atroid belt between
mars and jupiter