Observing:   You use your senses to obtain information about objects or events in the world around you. Measurements:   Such as length, distance, mass, volume, and temperature. Estimating:   Involves observing and judging in different situations. Often, you estimate using numbers. With practice your estimates become more accurate. Classifying:   You classify objects, organisms, ideas, or events by grouping those that are alike in some way. You can group things by shape, size, color, use, or by other charactaristics. Inference:   Is a possible explanation for an observation or a set of observations. Sometimes you can make more than one inference from the same observation. You can test the accuracy of an inference by doing experiments. Predicting:   Is forecasting what might happen bassed on previous experience or observations. Communicate:   They record, organize and share the other observations they have obtained during experiments and other activities. Hypothesis:   Is an idea or explanation using observations and experience of why something might always happen in a certain way. Experiment:   You plan and carry out a series of activities that help you: find an answer to questions, solve a problem, observe how something behaves. Variables:   The parts of an experiment that can be changed during the experiment to influence the results. Interpret Data:   When you interpret data you examine and compare the measurements that you have taken. You look for patterns that will help you explain your results. Creating Models:   Pictures, diagrams and other representing ideas.