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.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.


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.

Remove ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




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

Eyes

Human and Animal Eyes

Why does your pupil get larger when the room is dark? So that more light can come into your eyes to help you see better.
How do nocturnal animals see better in the dark than we can? Their pupils can get bigger than ours and they have a colored layer at the back of their eyes that helps them see more light.
Why do people sometimes have red eyes in a picture that was taken with camera’s flash? Because the camera flash lights up the blood vessels at the back of our eyes.
What is the meaning for the word macula? The tiny area at the back of the eye that’s responsible for clear and sharp vision.
Why does your pupil get smaller when the room is bright? So that less light can come into your eyes to help you see better.
Why do some animals eyes seem to glow in the dark if you shine a flashlight on them? Because the colored layer at the back of their eyes glows when the bright light from the flashlight shines on them.
When is the science test? Thursday
Created by: jvoltz