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# Final Review

### Bio 10

TermDefinition
Chemistry study of composition, structure, properties, and reactions of matter
Matter all substances that make up our world--anything that has mass and occupies space and is either pure substances or mixtures
Chemicals substances that have the same composition and properties wherever found
Scientific Method set of general principles that help to describe how scientists think
Steps of the Scientific Method Make Observations Propose a Hypothesis Conduct Experiments Form a Conclusion
What are the two parts of the scientific notation? coefficient and power of 10
Units of Measurement in Metric length: m volume: L mass: g Temp: Celsius Time: s
Units of Measurement in SI length: m volume: m^3 mass: kg Temp: K time: s
1m 100 cm
1L 1000mL
1kg 1000g
Measured Numbers numbers obtained when you measure a quantity such as your height, weight, or temperature -observe the numerical values of marked lines -estimate value of the numbers between marks -use the estimated number as the final number in your measured numbered
Significant Figures -used to represent the amount of error associated w a measurement -all nonzero digits and zeros between digits -zeros at the end of a decimal number
Exact Numbers are in definitions that compare two units in the same measuring system
Multiplication and Division---Sig Figs final answer is written so that it has the same number of sig figs as the measurement w the fewest sig figs
Adding and Subtracting--Sig Figs final answer is written so that it has the same number of DECIMAL places as the measurement w the fewest decimal places
Equalities use two different units to describe the same measured amount
Density compares the mass of an object to its volume DENSITY=MASS OF A SUBSTANCE/VOLUME OF A SUBSTANCE
pure substances have a fixed or definite composition an element that is composed of one type of atom a compound that is composed of two or more elements always combined in the same proportion
mixtures contain two or more different substance that are physically mixed but not chemically combined
elements pure substances that contain only one type of material
compound contains two or more elements in a definite ratio
Created by: ravalireddy