Science

4. an instrument that measures temperature
7. theory a well-tested explanation for a set of observations or experimental results
10. a representation of an object or event
11. the use of scientific knowledge to solve practical problems
13. factor a ratio of equivalent measurements that is used to convert a quantity from one unit to another
14. the amount of matter in an object
16. a system of knowledge about the natural world and the methods used to find that knowledge
17. notation a way of expressing a value as the product of a number between 1 and 10 and a power of 10
18. variable a variable that changes in response to a change in the manipulated variable
21. variable the variable that causes a change in another variable / the variable that the scientist changes in an experiment

1. experiment an experiment in which only one variable, the manipulated variable, is deliberately changed at a time
2. the ratio of a material’s mass to its volume
3. the straight-line distance between two points
5. the study of the composition, structure, properties, and reactions of matter
6. a proposed answer to a question
7. law a statement that summarizes a pattern found in nature
8. the study of matter and energy and the interactions between the two through forces and motion
9. information obtained through the senses
12. the closeness of a measurement to the true value of what is measured
15. a gauge of how exact a measurement is
19. method an organized plan used for gathering, organizing, and communicating information
20. the amount of space taken up by an object