Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

PS OGT PRACTICE

SOLAR SYSTEM

QuestionAnswer
Solar System: Heliocentric Theory theory first proposed by Copernicus, stating that Earth and other planets revolve around the sun. (Prefix helio=sun). Later theory geocentric (Prefix geo=earth) means earth the center.
Solar System: Gravity explained by Newton, force of attraction between any two objects; governs movements and characterization of the planets, asteroids, and comets
Force of Gravity (Universal) proportional to the product of the masses of the object divided by the square of the distance between them.
nebula scientists believe stars were formed out of clouds of gases and dust in space
Star's energy produced by nuclear fusion, converting hydrogen into helium. Theory says stars form all elements through further fusion
“Big Bang” Theory scientists believe that the universe began in an explosion between 13 and 15 billion years ago. They base their theory on the movement of stars away from one another (red shift) and from background cosmic radiation.
Created by: Ruth.Miller
Popular Earth Science sets

 

 



Voices

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:
Retries:
restart all cards