science Flashcards
vocabulary
asteroid
millions of small rocky objects that orbits the Sun in the asteroid belt between the orbit of Mars and Jupiter
sun
a star the center of our solar system
Inner planets
mainly solid rocky material
what are the inner planets
Venus, earth, and Mars
Outer planets
mainly made of ice and gases
what are the outer planets
Saturn, Jupiter, Uranus, and Neptune
Dwarf planets
spherical object that orbits the sun, does not have more mass than objects in nearly orbit
Comet
is made of gas dust and ice, moves around the sun in an oval- shaped orbit, come from the other parts of solar system
astronomical unit
is the average distance from earth to the sun
Period of Revolution
the time it take Earth to travel around the sun (year)
Period of rotation
time it takes for an object to complete on rotation around itself (day)
Terrestrial planet
are the planets closer to the Sun, are made of rock and metal and have a solid outer layer
Greenhouse effect
occurs when a planet’s atmosphere traps solar energy and causes the surface temperature to increase
where does the greenhouse effect happen
venus
Galilean
the four largest moons of Jupiter
what are the four moons of Jupiter
Io, Europa, Ganymede and Calisto
Meteroid
is small rocky particle that moves through space
Meteroite
is a meteoroid that strikes a planet or a moon
Meteor
is a streak of light in Earth’s atmosphere made by a glowing meteroid
Impact crater
is a round depression formed on the surface of a planet, moon, or other space object by the impact of a meterite
When did Pluto become a Planet?
2006
What Planet has a longer period of rotation that a period of revolution
Venus
farthest planet from the sun
venus
Name four dwarf planets
Makemake
pluto
Eris
Ceres
