| A | B | 
|---|
| data | information gathered by scientists | 
| meter | basic metric unit for length | 
| microscope | an instrument that makes small objects appear larger | 
| controlled experiment | an experiment with two test groups | 
| volume | the amount of space in something | 
| kilogram | the metric unit for measuring mass | 
| lens | a piece of glass for bending light | 
| constant | the factor kept the same in an experiment | 
| cubic meter | a metric unit for volume based on the meter | 
| density | the amount of mass in a given volume | 
| variable | the factor that changes in an experiment | 
| liter | the metric unit for volume | 
| mass | the amount of matter something contains | 
| observe | use senses to get information | 
| infer | explaination for  an observation | 
| estimate | guess the number of | 
| measure | the amount of an observation (# & unit) | 
| predict | say what might happen in the future | 
| classify | sort or group things | 
| hypothesize | suggest an answer to a problem | 
| analyze | looking for patterns or trends in data | 
| circle graph | a graph showing percentages | 
| bar graph | a graph for comparing | 
| line graph | a graph to show change over time |