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vocabulary
Term | Definition |
---|---|
observation | recognizing and noting some FACT to gather information about the world |
qualitative observation | factual descriptions that do not use numbers |
quantitative observation | factual descriptions that do use numbers |
inference | a possible explanation or guess of an observation |
prediction | make a forecast |
classify | group by similar characteristics |
communication | tell others what you know |
ruler, meter stick | measures distance |
graduated cylinder | measures liquid volume |
triple beam balance, scale | measures mass |
thermometer | measures temperature |
meter | the base unit of length |
liter | the base unit of liquid volume |
gram | the base unit of mass |
celsius | the base unit of temperature |
kilo | 1000 |
centi | 1/100 |
milli | 1/1000 |
hypothesis | educated guess |
observational investigation | when changes are being observed |
experimental investigation | when a hypothesis is being tested |
independent variable | the variable that you change, the manipulated variable |
dependent variable | the result of the effect of the manipulated variable |
constant | the factors that remain unchanged |
control | the standard of comparison |
fair test | an experiment that changes only one variable |
repeated trails | completing an experiment many times, so that the test is valid (fair) |