Units of Measurement in Physics Quiz

The SI unit for length is ______

The symbol for kilo is ______

Significant Figures are digits that carry meaning contributing to its measurement ______

For MULTIPLICATION and DIVISION: A product a x b or a quotient a ÷ b has the same number of significant figures as the fewest ______

Scientific notation refers to the number of important single digits in a value, often a ______

It is used in determining the degree of conformity of a test result to a true or accepted value: ______ figure

Accuracy pertains to the consistency of achieving the same results repeatedly even if the value is far from the true value: ______

It is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the Cesium-133 atoms: ______

It is defined as the mass of a cylinder of platinum-iridium alloy at the International Bureau of Weights and Measures: ______

It is the distance travelled by light in vacuum during a time interval of 1s: ______

GENCHEM180 is the study of Matter and its properties Changes that matter undergoes Energy associated with changes in matter. What are the Branches of Chemistry?Branches of Chemistry Nuclear Chemistry o Radioactivity o Nuclear processes o Nuclear properties Organic Chemistry oHydrocarbons Oxygen Nitrogen Sulfur Phosphorus Radiostable Halogens Branches of Chemistry Physical Chemistry oPhysics in Chemical Concepts Intermolecular Forces Reaction Kinetics Electrochemistry Thermochemistry Chemical Equilibrium Colligative Properties Analytical Chemistry oSeparation of matter oIdentification of matter oQuantification of matter Branches of Chemistry Astrochemistry Biochemistry oMatter in space (e.g., stars) oInteraction of space matter with radiation oBiomolecules Carbohydrates Lipids Proteins Nucleic Acids oMetabolism Branches of Chemistry Inorganic Chemistry Chemical Engineering oInorganic and organometallic compounds (i.e., generally not organic compounds) oStructure oSynthesis oBehavior oPhysical Sciences oLife Sciences oApplied Mathematics oEconomics oMaterials and Energy oProduction (field) It is the quantitative comparison of an object's physical quantity that involves a number and a unit.

Branches of Chemistry Nuclear Chemistry focuses on the ______ of matter

Organic Chemistry deals with Hydrocarbons, Oxygen, Nitrogen, Sulfur, and ______ Halogens

Analytical Chemistry involves the separation, identification, and quantification of ______

Volume = L x W x T = 4.2 cm x 2.38 cm x 0.25645 cm = 2.6 cm3. The volume of the sheet of graphite composite is ______ cm3

If the digit removed is more than 5, the preceding number increases by 1. Example: 4.268 round to 4.27 if you need three significant figures. If the digit removed is less than 5, the preceding number remain the same. Example: 2.2314 round to 2.2 if you need two significant figures. If the digit removed is 5, the preceding number increases by 1 if it is odd and remains the same if it is even. Example: 26.55 rounds to 26.6 but 26.65 rounds to 26.6. Rule in rounding off is to always carry one or two additional significant figures through a multistep calculation and round off the final answer only. This process ensures ______ in calculations.

Scientific Notation – used to indicate the number of significant figures and thus removes the ambiguity. Example: 2500 ; 0.00025 2.5 x 103 – 2 SF ; 2.5 x 10-4 – 2 SF 2.50 x 103 2.500 x 103 – 3 SF – 4 SF ; ; 2.50 x 10-4 2.500 x 10-4 – 3 SF – 4 SF. Scientific notation helps to indicate the number of significant figures and removes ambiguity in ______.

Conversion Factor is a fraction or ratio numerically equal to 1, that is used to change the unit without changing the magnitude of a quantity. Sometimes, it’s necessary to convert units from one system to another. The process of converting units involves using a ______ to change the unit without changing the magnitude of a quantity.