Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
Apollo 11 |
name of first mission in which people landed on the surface of the moon |
|
asteroid |
chunk of rock which orbits the sun in an elliptical path |
|
asteroid belt |
large collection of asteroids located between Mars and Jupiter |
|
astronomical unit (AU) |
a measure of distance equal to 93 million miles |
|
axis |
imaginary slanted line that runs though the center of the planet from pole to pole |
|
comet |
mass of ice and dust that orbits the sun |
|
comet coma |
cloud of evaporated dust and gas that surrounds the comet nucleus |
|
comet nucleus |
center of comet |
|
comet tail |
visible stream of vaporized dust, ice, and gas that extends out from the comet |
|
elliptical |
oval-shaped |
|
meteor |
meteoroid that has entered the Earth's atmosphere |
|
meteorite |
meteor that has crashed into the Earth |
|
meteoroid |
small asteroid |
|
moon phases |
the parts of the moon that are visible from Earth |
|
orbit |
the movement of one space object around another |
|
rotation |
one full spin of a planet on its axis |
|
revolution |
one full orbit of the Earth around the sun |
|
satellite |
an object that orbits around another object in space |
|
space probes |
spacecraft sent from Earth to space to take pictures and gather data |
|
spherical |
shaped like a sphere; round |
|
tides |
events in which the ocean water rises and falls due to gravitational forces of the sun and moon |