1. Observation
Information we get from our senses alone.

2. Inference
An idea or conclusion reached using both our senses and prior knowledge.

3. Classification
Grouping or organizing things based on similar characteristics.

4. Direct Relationship
Both values increase

5. Inverse (or indirect) relationship
As one value increases, the other decreases.

6. Constant (or static) relationship
As one value increases, the other value stays the same.

7. Cyclic Relationship
As one value increases, the other increases and decreases in a predictable pattern.

8. Extrapolate
To predict what will happen next based on known data.

9. Independent Variable
The variable that is changed or controlled in an experiment

10. Dependent Variable
The variable being tested and measured in an experiment

11. Density
The concentration of matter in an object
D=M/V

12. Mass
The amount of matter an object possesses

13. Volume
The amount of space an object occupies