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Science Midterm
2022 Science Midterm Review
| Term | Definition |
|---|---|
| why do we do experiments | curiosity, we like to ask questions that are testable |
| hypothesis | best answer to the question that you come up with |
| variable | something that changes during an experiment |
| 2 variables in an experiment | Independent and Dependent |
| Independent variable | the variable that the scientist changes on purpose |
| Dependent variable | the variable that is expected to change by the independent variable |
| confounding variables | variables that are not controlled and can falsify the experiment |
| control group | receives none of the treatment in the experiment |
| graph/chart | way to show visual data |
| 5 types of graphs | line, scatter, bar, histogram, pie |
| difference between bar and histogram | bar has space between, histogram doesn't |
| DRY MIX | D- dependent variable, R- responding variable Y- y-axis M- manipulative variable I- Independent X- x-axis |
| we describe locations....... | ......relative to reference points |
| 1 dimensional | length/distance, positive: away from the reference point, negative: towards the reference point |
| 2 dimensional | area, maps: west and south, position on a chess board |
| 1D Distance Formula | d=|x(final)-x(initial)| |
| 2D distance formula | square root of: x[2] - x[1]) squared + (y[2] - y[1])squared |
| motion | process of changing position relative to a reference point |
| distance | how far an object travels, SCALAR measure, only a magnitude |
| displacement | distance and direction form the starting point, VECTOR measure, magnitude and direction |
| scalar | distance, time, temperature |
| vector | position, displacement, temperature |
| speed | measure of the distance an object travels per unit time |
| per means.... | .....divided by |
| whatever you do to the numbers you do to the.... | ....units |
| constant speed | same distance is travelled per unit time |
| instantaneous speed | speed at a specific instant in time |
| average speed | total distance divided by total time |
| speed vs velocity | speed is scalar and only a magnitude, velocity is vector and is a magnitude and direction |
| distance on a graph | y-axis |
| time on a graph | x-axis |
| straight line = ..... | ....constant speed |
| slope of a line on distance time graph | represents speed, steeper=faster, horizontal line=no speed |
| x axis is also the | reference point |
| downward curve | slowing down |
| upward curve | speeding up |
Created by:
EllieKate27
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