| A | B |
| experiment | the use of scientific investigation and reasoning to test possible answers to questions |
| inquiry | the process of asking questions and searching for answers |
| tool | an object or device used to perform a task |
| investigation | a careful way of looking for something |
| hypothesis | a possible answer to a question |
| observation | something you find out about objects, events, or living things using your senses and tools |
| variable | something that can change |
| procedure | a set of step-by-step instructions |
| evidence | observations and facts gained from experiments |
| inference | a conclusion drawn from data and observations |
| volume | the amount of space that matter takes up |
| property | a characteristic of an object |
| state of matter | the form in which particles are arranged and move |
| density | the property of matter that compares an object's mass to its volume |
| melting point | the temperature at which a substance changes from a solid to a liquid |
| mass | the measure of the amount of matter that makes up an object |
| evaporation | the changes from a liquid into a gas |
| boiling point | the temperature at which a substance changes from a liquid to a gas |
| mixture | a combination of two or more substances |
| solution | a mixture in which one or more substances are dissolved in another substance |