Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

Username is available taken
show password

Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Astronomy Lesson 1/2

What do you call the Earth, planets, sun, stars and everything in space? Universe
What is Astronomy? The study of everything in space, including stars, planets, sun and moons.
Before calendars, what did people use to mark the days, months and years? The stars
What are constellations? groups of stars that make patterns in the sky.
In ancient times, what did people use to tell them what season it was? Constellations
To mark important events in history, God used stars as what? Signs
Give an example of God using a star as a sign. The star of Bethlehem was used as a sign of Christ's birth.
What is the force that pulls one object to another? Gravity
List all planets in order starting with the closest from the sun. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto
A person that studies everything in space, including the stars is called what? Astronomer
Who first the theory that the Earth revolved around the sun? Nicolas Copernicus
Who proved Copernicus' theory to be true and how? Galileo proved that the sun was the center of the Universe by using a telescope.
What does NASA stand for? What are some of the the things that NASA does? National Aeronautics and Space Administration NASA runs America's space program and builds spaceships, telescopes, robots and other tools used for space exploration.
What is the name of the enormous telescope floating out in space? Hubble Telescope
What is a satellite? an object in space that travels in a circle around another object.
What are the two types of satellites and give an example of each. Naturally Occurring (moon) Man-made (Hubble Space Telescope)
What is an annual eclipse? The sun is hidden directly behind the moon, but a ring of sunlight can be seen around the silhouette of the moon.
What do you call the Layers of gases and mist that surround a planet. Atmosphere
What are auroras? Natural, colorful, electrical lights in teh sky caused by solar flares
What are small points of sunlight which look like small beads, that can be seen around the moon during an eclipse? Bailey's Beads
What are droughts? And what is one cause of them? Long seasons of extremely dry weather with no rain, which can be caused by too many sun spots.
What is orbit? The path an object in space follows around a larger object.
What does revolve mean? To orbit or move in a circular motion around another object.
What does rotate mean? To turn around on a fixed point, such as a spinning top or a spinning planet.
The position of the moon in between the Earth and sun which blocks the sun's light rays from the Earth. Solar Eclipse
What are solar flares? Large fires which burst out millions of miles from the sun, releasing energy into the solar system.
What are dark patches on the surface of the sun which are cooler than the rest of the sun? Sun Spots
Define Thermonuclear Fusion Controlled explosions (nuclear reactions) occurring on the sun that give it energy and power.
What do you call the occurrence of the sun being completely hidden behind the moon? Total Eclipse
Explain why it is not safe to look at the sun. Our eyes have a lens like a magnifying glass. If we look directly at the Sun, the light shines through our lens and onto our retina which causes damage and can cause blindness. We can't feel anything because our retina does not have pain sensors.
What helps the planets to stay in their proper order? Gravity
What do you see when light waves of varying lengths bounce into your eye? Color
All the colors (except black) combine to form what color? White
What happens to form the color black? When all colors get absorbed. Black is the absence of color.
Why does the sky appear blue? Short light waves (blue) bounce off the stuff in the atmosphere.
Created by: browder5
Popular Earth Science sets




Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
restart all cards