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 (0)
Remaining cards (0)
Know (0)
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

Sharks

Oceanography Shark Unit

QuestionAnswer
Are sharks considered fish? Yes, all Class Chondrichthyes are fish
What does Chondrichthyes mean? Cartellagenous Fish
Is there more salt in the ocean or in a fish? the ocean. Fish use osmoregulation to eliminate salt from their body.
Are shark attacks common or rare? Rare - fewer than 100 per year
Do sharks have a swim bladder? No, they use the oil in their liver to adjust for depth.
Can sharks stop and rest? Many can stay still - if they have the spiracle. Others must keep moving.
How long is the smallest shark? (the pygmy) 9 inches long
What shark is most dangerous to humans? Great White Shark
How many shark species are there? 360 species
What is a shark's skeleton made of? Cartilage
What is the world's largest fish? Whale Shark
Evidence for sharks goes back how many years? 450 million years
What shark can move between fresh and salt waters? Bull Shark
What is another name for Caudal fin? Tailfin
What are claspers used for? Mating
Where is the fin spine located? In front of the First Dorsal Fin
Created by: tejneckyc
 

 



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