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Science Midterm
2014
| Question | Answer |
|---|---|
| Parts of Scientific Method | 1.Identify the problem 2.Gather info. 3.Make a hypothesis 4.Test hypothesis 5.Analyze and conclude |
| 4 point conclusion | 1.Restate hypothesis 2.use data to support the results 3.comment on the design of the experiment 4.the larger picture |
| independent variable | thing you are testing for |
| dependent variable | the results |
| how to find speed | speed=distance divided by time |
| velocity | speed with direction |
| how to find velocity | velocity= distance divided by time |
| acceleration | the speed between two points |
| meters | distance |
| seconds | time |
| meters/second | speed |
| meters/second north | velocity |
| meters/seconds squared(2) | acceleration |
| how to find acceleration | final velocity-initial velocity/time |
| scientific theory | the best explanation based on a tremendous amount of evidence shown many times |
| what makes things move | forces |
| forces | a push or pull one body exerts on another |
| unbalanced forces | DO cause things to move |
| net force | an unbalanced force |
| balanced forces | do not cause things to move |
| Newtons 1st law | A. an object at rest will stay at rest unless acted upon by a net force B. An object in motion will stay in motion unless acted upon by a net force |
| 2 net forces | friction and gravity |
| inertia | a natural resistance to an unbalanced force |
| mass | the amount of matter/space an object takes up |
| Newtons 2nd law | F= M.a an object will accelerate in the direction of the force applied and will depend on the mass and amount of force |
| Kg | mass |
| N | force |
| m/s2 | acceleration |
| gravity | the farther apart things are, the less the gravitational pull weight/mass |
| force of gravity | 9.8 m/s2 |
| weight | a force |
| Newton | 1. father of physics 2.wrote Principia Mathmatecia |
| Principia Mathmatecia | has all the laws of motion |
| Newtonian telescope | -uses 2 sets of mirrors -smaller- can see farther -didn't distort color or light |
| terminal velocity | the point when an object reaches its maximum velocity |
| projectile motion | the path that projectile motion |
| centripetal force | the tendency of a body to lean inwards toward the center |
| weightlessness | no such thing: free falling objects |
| Newtons 3rd law | for every action there is a reaction |
| centrifical force | leans outwards |
Created by:
julia13
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