Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

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.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
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

Dnsr notes 23

Sickle-claws and fossil feathers

What was the climate like in the cretaceous? mild, relatively warm even at high latitudes. This happened due to the increased seaways and sea levels.
What was the sea level like in the cretaceous? Many major landmasses were separate from one another, although some did have persistent connections due to the changing sea levels. Sea levels were relatively high.
What divided North America into an eastern and western side? Cretaceous Interior Seaway
During the Early Cretaceous, dinos from North America suggested links with what continents? Western Europe and Asia
What were plants like in the Early Cretaceous? Similar to the Jurassic with a diverse variety of pteridophytes (ferns and horsetails) and gymnosperms.
What was significant about plant life at the end of the early cretaceous? Angiosperms, or flowering plants appeared and rapidly achieved dominance.
How many species of angiosperms exist and dominate today? 220,000 known species
What characteristics did angiosperms hold? occupied a wider range of habitats, achieved a broad range of sizes and heights, recovered quickly from damage, and had fewer chemical and mechanical impediments to digestion.
Which groups of sauropods dominated which times in the cretaceous? Early cretaceous, brachiosaurus. Late cretaceous, titanosaurus
Theropods diversified dramatically during the cretaceous, bringing in what groups? utahraptor, therizinosaurs, giganotosaurus, baryonyx
Which of the theropods was dominant? Tyrannosaurs
Which thyrophorean diversified? Anklyosaur
Which ornithopod groups diversified? Early cretaceous: hypsilophodonts and iguanodonts. Late cretaceous: Hadrosaurs
Which marginocephalians diversified? Pachycephalosaur and Ceratopsians. They ranged from small-bodied psittacosaurs, to mid-sized protoceratopsians and massive ceratopsids.
Which assemblage in Yixian, China, preserves an entire ecosystem? Jehol Biota
What are some dinosaurs that Jehol Biota preserved? Confuciusornis, Sinosauropteryx, Dilong and Yutyrannus (feathered), therizinosaur, beipiaosaurus. Oviraptor, Caudipteryx. The dromaeosaurids sinornithosaurus. The troodontids Mei and sinovenator
What formation does Utah have and how old are the rocks? Cedar Mountain Formation and the rocks are 128 to 100 million years old
Name some dinos found in the cedar mountain formation? Utahraptor, falcarius, abydosaurus, brontomerus, cedarosaurus, eolambia, hippodraco, iguanacolossus along with many turtles, crocs, mammals, and lizards
Created by: Chelseagirl2508
Popular History sets




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:
restart all cards