| A | B |
|---|
| gram | base unit for mass |
| measurement unit of a balance | gram |
| a balance measures an object's | mass |
| mass | similar to an object's weight |
| liter | base unit for volume |
| base measurement unit for graduated cylinders | liter |
| liter measurements can describe | how much space something takes up |
| base unit for ruler or meter stick | meter |
| meter | base unit for length or distance |
| independent variable | variable being "tested" by scientist |
| scientist changes for each group in an experiment | independent variable |
| scientist keeps the same for each group | constant or controlled variable |
| constant or controlled variable | helps make comparisons "fair" in experiments |
| dependent variable | "measured" variable |
| "result data" of an experiment | dependent variable |
| control group | group that gets no special treatment |
| group that shows scientist what "normal" looks like | control group |
| sample size | number of people in an experiment |
| must be large to reduce chance of errors | sample size |
| repeated trials | help verify a scientist's data or conclusions |
| conducting an experiment more than once | repeated trials |
| the independent variable is graphed on ___ | the X-axis |
| the dependent variable is graphed on ___ | the Y-axis |
| the bottom of a graph | the independent variable is graphed on ___ |
| the side of a graph | the dependent variable is graphed on the ___ |
| bias | letting emotions affect your observations |
| a person who expects a result might has ___ | bias |
| hypothesis | prediction based on background information |
| if __, then __ type prediction | hypothesis |
| conclusion | summary of experimental data |
| should be based on observed data | conclusion |
| major trait of real sciences | use of controlled experiments |
| controlled experiments | how scientists discover things |
| goggles and lab aprons | should always be worn |
| major safety gear in labs | goggles and lab aprons |
| don't dispense flammable substances ___ | near an open flame |
| heat source | don't pour flammable liquids near a ____ |
| never heat a | sealed test tube or container |
| when heating a container, make sure ___ | it doesn't have a lid or stopper on it |
| acid | has pH below 7 |
| neutralizes a base | acid |
| base | has a pH above 7 |
| neutralizes an acid | base |
| neutral susbstance | has a pH of exactly 7 |
| something that is not an acid or a base | neutral substance |
