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science 9 week test
| Question | Answer |
|---|---|
| milli | .001 |
| centi | .01 |
| kilo | 1,000 |
| temp | kelvin |
| time | seconds |
| electricity | ampere |
| in a graph showing growth of a plant with different fertilizer, the growth is considered the ______ | dependent variable |
| the application of science | technology |
| scientific method | question, hypothesis, procedures, results/data, conclusion, next question |
| hypothesis | an educated guess |
| scientific theory | an explanation |
| scientific law | a rule |
| independent variable | the variable you change to see how it will affect the dependent variable |
| dependent variable | variable changes according to changes in other variables |
| an idea, event, or object can be represented by ____ to help people better understand it | model |
| a factor that does NOT change in an experiment is the _____ | constant |
| name the branches of science | life, earth, physical |
| bias | occurs when what scientists expects changes the results of an experiment |
| K->C | -273 |
| density formula | Mass/volume |
| the tot time of total distance traveled divided by the total time of travel | average speed |
| the rate at which velocity changes is ______ | acceleration |
| speed formula | speed= distance/time |
| acceleration unit | m/s^2 |
| length | meters |
| speed | m/s |
| if you know both the speed and the direction of an object's motion,then you know the ____ | velocity |
| what is the steepness of a line on a graph called? | slope |
| what is the formula for acceleration | final velocity- initial velocity / time OR force/mass |
| how do you know an object is in motion | the position of your stationary reference point changes |
| when does something accelerate | when it changes speed or direction |
| the distance an object travels per unit of time | speed |
| includes the speed and direction of the object | velocity |
| the rate of change of velocity | acceleration |
| forces can be added together only if they are | in the same direction |
| the tendency of an object to resist change in its motion is known as | inertia |
| what are two ways to increase acceleration | decrease mass; increase force |
| weight | gravitational force exerted on an object |
| mass | amount of matter in an object |
| what's an example of increasing friction intentionally | sand on ice; application of brakes |
| when an object moves in a circular path, it accelerates toward the center of the circle -> | centripetal force |
| momentum formula | mass x velocity |
| momentum units | kg x m/s^2 |
| the relationship among mass, force, and the acceleration | newton's 2nd law of motion |
| law of conservation of momentum | momentum can be transferred from one object to another |
| what is the acceleration due to gravity | 9.8 m/s |
| what two things does gravitational force depend on? | distance and mass |
Created by:
missyprissi96
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