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
share
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

Science Test

Earth Unit

QuestionAnswer
What substances are in earth's second atmosphere? Water vapor, nitrogen, and carbon dioxide
What substances are in earth's first atmosphere? Helium, and hydrogen
What substance do living organisms give to the atmosphere? Oxygen
What are the earliest life forms similar to? Bacteria
What is a comet? A ball of dust and ice that orbits the sun
What galaxy is the earth in? The Milky Way Galaxy
What galaxy is closest to earth? (closest other galaxy) Andromeda
What star is closest to earth other than the sun? Proxima Centuri (4.2 light years away)
What is the distance that a star travels in a year? Light Year
When did the Precambrian begin? 4.6 billion years ago
When did accretion begin? 4.6 billion years ago
When did Cambrian begin? 544 million BP
What is accretion? The process of forming the earth through gravity causing matter to come together
What is molten? Melted; when something is in liquid form
What forms when the surface rock cools? The crust
What sinks to the center of the earth forming the core? The heaviest metals
What transforms the planet to become a molten planet? Heat from accretion
What causes matter to come together Gravity
When did Precambrian end? 544 million BP
When did Pangaea occur? 150,000,000 BP
When was the last ice age advance? 17,000 BP
How long did accretion last? 100,000,000 years Began 4.6 billion years ago
What is the age of the earth? 4.6 billion years old
Why is the interior of the earth hot? 1)The friction in the core 2)Heat from accretion trapped by crust 3) The matter inside earth's core
What forms the crust? The cooled rock on earth's surface
Why are iron and nickel the most predominant elements of the core? The most dense
Created by: kaylashay34
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