NOS CH1

3. a possible explanation for an observation that can be tested by scientific investigations
5. a spoken or written summary of an observation
8. the factor that is changed by the investigator to observe how it affects a dependent variable
11. comparing what you already know about something to new information and deciding whether or not you agree with the new information
14. an explanation of observations or events that is based on knowledge gained from many observations and investigations
20. the factor a scientist observes or measures during an experiment
21. an interpretation of observations

1. the act of using one or more of your senses to gather information and take note of what occurs
2. a statement of what will happen next in a sequence of events
4. a method of writing or displaying very small or very large numbers
6. the part of the controlled experiment used to study relationships among variables
7. the use of words to describe what is observed in an experiment
9. the internationally accepted system of measurement
10. the investigation and exploration of natural events and of the new information that results from those investigations
12. the part of a controlled experiment that contains the same factors as the experimental group, but the independent variable is not changed
13. the factors in an experiment that remain the same
15. a rule that describes a pattern in nature
16. any factor that can have more than one value
17. the use of numbers to describe what is observed in an experiment
18. the practical use of scientific knowledge, especially for industrial or commercial use
19. a logical explanation of an observation that is drawn from prior knowledge or experience