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.
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
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

powerpoint 6-8

Questions over powerpoint notes

QuestionAnswer
Which kind of water do water waves travel faster? deep water
What point along a wave front is the wave moving? perpendicular to the wave front
What represents the direction of motion of the wave? rays
Where does the wave refract when the depth changes? at the boundry
what causes uneven winds or sound to travel through uneven air? sound refraction
Which type of air does sound travel faster? warmer air
Which way do sound waves bend against a warm ground? they bend away
what temperature is the air above the ground when the speed of sound near the ground is reduced? the ground is colder
A higher speed of a wave front above the ground causes a bending in what direction? toward the Earth
give two examples of refraction of light a star twinkling and a pencil in a glass of water appearing bent.
What is the speed of light in air? fast
Does light travel slower or faster than air in water? It travels slower in water than in air.
How does light bend when it slows down as it hits the water? It bends toward the normal.
How does light bend as it moves from the water to the air? It bends away from the normal.
When the sound bends due to changes in wind speed or temperature, how is the refraction? the refraction is gradual
Created by: MSeise