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

Earths History

QuestionAnswer
Absolute (radioactive)Dating measurement of the known rates of decay of radioactive materials that an object contains in order to determine the age of the object
Index Fossil fossil known to have lived in a particular geologic age that can be used to determine the date of the rock layer in which it was found
Law of Superposition states that in undisturbed rock layers that newer layer will be deposited over older layers
Law of Crosscutting Relationships states rock layers that cut across other rock layers are younger than those they cut
Relative Dating determining the age or order of things from the past or past events without knowing or calculating the actual age
Sedimentary rock rock formed by deposition of sand, clay and other pieces of rock that are compacted together under pressure
Uranium radioactive heavy metal that is an abundant source of nuclear energy that has 14 known isotopes used in radioactive dating
Fault fracture along which blocks of the Earth's crust that can be caused by the shifting or dislodging of the Earth's crust. Types include normal, strike slip, or reverse
Fossils remains or traces of animals, plants and other organisms from the past; usually at least 10000 years old
Geologic Time Scale system of chronological measurement that relate to the history of events in Earth's past, consisting of fossils and major events
Ice Core a core sample of ice removed from a sheet of ice. Properties of the ice and the crystallized components in the ice are used to reconstruct climatic record
Igneous rocks type of rock formed under or above ground when magma or lava cools
Metamorphic rock rock created from the transformation of other types of rock through heat and pressure Adaptation
Biologic Change change in an organism's genetic makeup, DNA, that occurs through natural selection of advantageous traits for survival over an extended period of time.
Biological classification the organization and identification of an organism from general to specific by identifying the organisms' Domain, Kingdom, Phylum, Class, Order, Genus, and Species
Comparative anatomy the analysis of body structures (body systems , skeletal systems) between two or more different species that provides insight into the genetic/biologic similarities and differences across species
Continental Plate the crust that makes up the continents
Embryological similarities likenesses in the embryonic stage of development between different species; evidence for evolution.
Extinction the complete elimination (dying out) of a species due to the species inability to survive and therefore adapt to its environment.
Geographic Change the change in a geographic area caused by earthquakes, volcanoes, mountains forming, and other natural phenomena.
Geologic Time Scale timeline that illustrates Earth's past. This timeline includes the divisors of the 4.6 billion years of Earth's geologic and biologic existence, and divides time into eons, eras, periods, and epochs.
Geology the study of the rocks, processes, and history of Earth
Homologous Body Structures Similar body structures and systems between different species; evidence for biologic evolution
Oceanic Plate the part of Earth's crust that underlies the oceans
Plate Tectonics the Earth's lithosphere is broken into major and minor plates of continental or oceanic crust that are in constant motion due to their position above the convection currents of the asthenosphere.
Adaptation a beneficial trait that helps an organism survive in its environment.
Genetic Variation the characteristics that make members of the same species different from one another. Variations
Genotype the genetic makeup of a cell or organism; defined by certain alleles for a particular trait. Offspring
Phenotype the physical appearance that is a result of the genotype.
Natural Selection explanation of how organisms in a population develop traits that allow them to survive and reproduce
Created by: Saba Aleem
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