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

Science

Study vocabulary words

QuestionAnswer
How old do the geologists think the world is? 4.6 billion years old
The principle that geologic processes that occurred in the past can be explained by current geologic processes is called? Uniformitarianism
layers of rock and ____, show the sequence of events that took place in the past. Strata
Even though all three classes of rock can form layers, the ones most commonly studied are? Sedimentary
The boundary between two beds of rock is called a____? Bedding Plane
The principle that a sedimentary rock layer is older than the one above it, is called the law of___? Super Position
The principle that a fault or intrusion is younger than the layers it cuts through, this is called the law of____? Cross Bedding Relationships
According to the principle in question #7, what happened first in the diagram below? Igneous Intrusion
What happened next after layer D was deposited? Igneous Intrusion
What event happened last? Fault
The absolute age o a rock layer is its____?age. Numeric
Using the rate of____ to determine absolute age would be less accurate for a surface feature such as the Grand Canyon which is millions of years old. Erosion
In general about 30 cm of sedimentary rock are___ over a period of 1,000 years. Deposited
some sedimentary rock layers show annual layers called_? Varves
Which layer(summer or winter) is composed of darker finer grains? Winter
Atoms of the same element that have different numbers of neutrons are called? Isotopes
The original radio active isotope is called the? Parent isotope
The half-life is the time required for half of a radio active sample to break down by decay to form the_____ isotope. Daughter isotope
What is the half-life of uranium-238? 4.5 billion
Created by: taelorschuler
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