Reading...
Play button
Play button
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;
11 Cards in this Set
- Front
- Back
|
constellation
|
A group of stars that form a fixed pattern in the nights sky.
|
|
|
axis
|
An imaginary straight line from the North Pole through Earth's center to the South Pole. Earth makes one complete turn on its axis in about 24 hours.
|
|
|
rotation
|
The spinning motion of an object on its axis. It takes about 24 hours for Earth to make one complete rotation.
|
|
|
revolution
|
The movement of an object around another object or point. It takes about 365 days to make one revolution around the Sun.
|
|
|
star
|
A huge globe of hot gases that shines by its own light. Many stars may have systems of planets around them.
|
|
|
planet
|
A large body in space that orbits a star and does not produce light on its own.
|
|
|
refracting telescope
|
An instrument for viewing distant objects that uses two lenses to gather light and produce an image.
|
|
|
reflecting telescope
|
An instrument for viewing distant objects that uses a curved mirror at the back of its tube to gather light and produce an image.
|
|
|
comet
|
A small object in space made of ice, dust, gas, and rock that orbits a star and that can form a gaseous tail. A comet begins to melt and to glow as it approaches the Sun.
|
|
|
meteors
|
A piece of rock or metal from space that enters Earth's atmosphere. A meteor is also called a shooting star.
|
|
|
meteorite
|
The remaining material of a meteor that has landed on the ground.
|
