1. Qualitative Observations Descriptions of sights, sounds, smells and textures.

2. Quantitative Observations Descriptions using numbers and measurements.

3. Inference Conclusion based on evidence and observations.

4. International International System (SI) System of metric measurements. Used by all scientists. Based on multiples of 10.

5. Mass The measure of the amount of matter in an object.

6. Volume The measure of the amount of space the object takes up.

7. Gram Base metric unit for mass. Usually measured with a triple beam balance. One paperclip has a mass of about one _______.

8. Meter Base metric unit for length. Usually measured with a ruler.

9. Liter Base metric unit for volume. Usually measured with a graduated cylinder.

10. Hypothesis Educated guess. Used to make testable predictions.

11. Independent Variable The part of an experiment that is changed so it can be tested. (Only one.) + + + +

12. Dependent Variable The part of an experiment that is measured to gather results. + + + +

13. Control The part of the experiment where the independent variable is not tested; used for comparison

14. Constants The variables in an experiment that are kept the same. + + + +