lession 2 since test Flashcards
study
how was the solar system made and when
made 4.6 billions years ago clouds of gas and dust cupped to gather by gravity into a small dense and spun and became the sun
how were planet made.
leftover gas and dust created planets
define planets
orbits the sun and is massive enough to be nearly spherical in shape and has no other object in its path
define dwarf planets
orbits the sun and is massive enough to be nearly spherical in shape but shares its path
define asteroid
small rocky that orbit the sun b/w the orbit of mars and
define comets
small rocky that orbit the sun
define meteoroids
small rock particles that move throughout space
define meteor
when meteoroids get into Earth’s atmosphere.
Mercury
.39 AU from the sun
Venus
.72 AU from earth hottest planet
Earth
1 AU from sun
Mars
half the size of earth 1.5 AU from sun
Jupiter
5 AU from sun
Saturn
2nd largest planet 9.5 AU from sun
Uranus
20 AU from sun