Apologia Gen Sci 4 Word Scramble
|
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
Normal Size Small Size show me how
Name, Term, or Concept | Description/Definition |
the goal of science | to find out why; motivated by curiosity |
the goal of applied science | to make something better |
technology | the invention of a new process or machine that makes life better or makes a job easier |
simple machine* | a device that reduces the amount of force needed to perform a task or changes the direction of a force |
force* | a push or pull that changes the motion of an object |
lever | a rigid bar that rotates around a fixed point called a fulcrum |
mechanical advantage* | the amount by which force or motion is magnified in a simple machine |
first-class lever | magnifies and changes direction of the effort |
second-class lever | magnifies but does not change direction of the effort |
third-class lever | magnifies speed but does not magnify or change direction of the effort (effort is greater) |
mechanical advantage of a lever = | (distance from fulcrum to effort) ÷ (distance from fulcrum to resistance) |
diameter* | the length of a straight line that travels from one side of a circle to another, while passing through the center of the circle |
mechanical advantage of a wheel and axle = | (diameter of the wheel) ÷ (diameter of the axle) |
wheel and axle | a large circular wheel attached to a smaller cylinder (the axle) |
pulley | a grooved wheel that rotates freely on a frame which is usually called a block, with a rope in the groove |
block and tackle | a system of multiple pulleys |
mechanical advantage of one pulley | 1 |
mechanical advantage of two pulleys | 2 |
mechanical advantage of an inclined plane, wedge, or double wedge = | (length of slope) ÷ height |
screw | an inclined plane wrapped around the axle of a wheel and axle |
pitch of a screw | the vertical distance between the threads |
mechanical advantage of a screw = | circumference ÷ pitch |
circumference* | the distance around a circle, equal to pi (approximately 3.1416) times the circle's diameter |
pi | a number that is approximately 3.1416 |
Created by:
ginnie
Popular Science sets