## Glossary of Chemistry measurement

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- What is DENSITY?
- the ratio of mass to volume or mass divided by volume

- Define WEIGHT
- A measure of the gravitational pull on matter

- What is a DERIVED UNIT?
- a unit that is a combination of SI base units

- What is a THEORY?
- a broad generalization that explains a body of facts or phenomena.

- What is an INVERSE RELATIONSHIP OR INVERSE PROPORTION?
- two quantities which have a constant mathematical product

- VOLUME is what?
- the amount of space occupied by an object.

- What does PRECISION describe?
- the closeness of a set of measurements of the same quantity made in the same way

- What is a PERCENT ERROR?
- A value calculated by subtracting the experimental value from the accepted value,dividing the difference by the accepted value and then multiplying by 100

- What does DIRECT PROPORTION or DIRECT RELATIONSHIP describe?
- two quantities that give a constant value when one is divided by the other

- What is a HYPOTHESIS?
- A testable statement

- ACCURACY describes what?
- the closeness of measurement to the correct or accepted value of the quantity measured