Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.
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
remaining cards
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:
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

9Sci Ch7

CH 7 Vocab 9SCI

bionics designing replacement body parts
compound machine combination of two or more simple mchines
efficiency ratio of useful work put out by a machine to work put into that machine
effort arm part of lever where effort force is applied
fulcrum the fixed part where a lever pivots
ideal machine machine that works 100% efficient; work out = work in
inclined plane simple machine containing a sloping surface (ramp) used to raise objects
lever simple machine with a bar that is free to pivot (rotate) around a fixed point (fulcrum)
machine device that makes work easier
mechanical advantage number of times a machine multiples
power measure of work doe in a certain time
pulley simple machine with a grooved wheel and a rope or chain running along the wheel
wedge simple machine with moving inclined plane with one or two sloping sides
wheel & axle simple machine that has two different sized wheels that rotate
Created by: hockettd