Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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

Evolution

7th Grade Evolution Test

TermDefinition
Theory explanation of things or events based on scientific knowledge resulting from many observations and experiments
Hypothesis a prediction that can be tested
Natural Selection a process by which organisms with traits best suited to their environment are more likely to survive and reproduce; includes concepts of variation, overproduction, and competition
Variation an inherited trait that makes an individual different from other members of the same species and results from a mutation in the organism’s genes
Adaptation any variation that makes an organism more suited to its environment
Evolution change in inherited characteristics over time
Biodiversity the sum total of all the living things on the planet
Galapagos Islands small islands off the coast of Ecuador which Darwin visited, he viewed many different species there which helped shape his theory of evolution by natural selection
Charles Darwin naturalist considered the ‘father of evolution’, studied the similarities between organisms to form his theory of evolution by natural selection
HMS Beagle the ship that Darwin sailed around the world on, left England in December 1831
On the Origin of Species Darwin developed his theory of evolution years after returning home from his voyage, his thoughts on evolution by natural selection are included in this book, which he authored
Common Ancestor The nearest evolutionary relative for a group of organisms
Embryology The branch of biology that deals with the formation, early growth, and development of living organisms
DNA Deoxyribonucleic Acid, the molecule from living organisms that is used to identify similarities among species
Sedimentary Rocks Rock that is formed when layers of sand, slit , clay or mud are compacted and cemented together or when minerals are deposited from a solution; Limestone, sandstone and shale are examples; Fossils are found more often in these types of rocks
Fossils The preserved remains of a living organism preserved as a cast or as an impression
Radioactive Element Gives off a steady stream of radiation as it slowly changes into a non-radioactive element; Gives scientists a more accurate picture of when in history certain rock layers were formed
Relative Dating In undisturbed areas, younger rock layers are deposited on top of older rock layers; Provides only an estimate of a fossil’s age Estimate by comparing layers both above and below fossils
Radiometric Dating The process of using radioactive elements in the earth to determine the approximate age of rock layers and the fossils within them
Analogous Structures adaptations that have a similar function, but not a similar evolutionary past.; For example – many insects, birds, and even mammals have wings. They do not have a close common ancestor
Homologous Structures Body parts that are similar in function and evolutionary origin For example – the arm bones of humans, frogs, and even bats have similar structures arranged in different ways, leading us to assume they have a common ancestor
Vestigial Structures Structures in the body that don’t appear to have a function They do help us to understand evolution and common ancestry For example – ear muscles on humans once helped our ancestors rotate their ears to hear better, today we can just wiggle our ears!
Survival of the Fittest In his theory of natural selection, which is discussed in greater detail later, Charles Darwin suggested that this was the basis for organic evolution (the change of living things with time).
 

 



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