Chemistry Test 1&2
Terms
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- examples of matter
- living and nonliving things
- hetero, and homo
- what 2 things can mixtures be classified as
- burning of coal petroleum and natural gas
- are major sources of energy
- liquid
- indefinite shape and has a fixed volume
- physical chem.
- area that deals with mechanisms the rate and energy transfer
- problem solving
- involves developing a plan and implementing that plan
- Alchemists
- who developed the tools and techniques for working with chemicals
- compound
- contains 2 or more elements chemically combined in a fixed proportion
- distillation
- liquid boiled to produce a vapor that is then condensed into a liquid
- theory
- tested explanation for a broad set of obsevation
- chemical reaction
- when a substance changes into a new substance
- analyze and solve
- steps for solving a conceptual problem
- gas
- takes shape and volume of the container
- always changes
- matter always does what during a chemical change?
- chemistry
- the study of the composition of matter and the changes that matter undergoes.
- biotechnology
- applies science to the production of biological products of process
- chemicals formulas
- what are used to represent compounds?
- manipulated variable
- can be changed during an experiment / independent variable
- chemical symbols
- what are used to represent elements?
- product
- produced during the reaction
- intensive property
- depends on the type of matter in a sample
- precipitate
- solid that forms and settles out of a liquid mixture
- analyze, calculate, and evaluate
- steps for solving a numeric word problem
- biochem
- study of the process that takes place in organisms
- reversible and irreverisble
- physical changes can be classified as what?
- insulation
- is the easiest way to conserve energy
- organic chem
- study of all chemicals containing carbon
- analytical chem
- study that focuses on the composition of matter
- hypothesis
- proposed explanation for an observation
- physocal change
- properties of material change, and composition of material doesnt change
- physical property
- quality or condition of a substance that can be observed or measured without changing the substances composition
- substance
- matter that has a uniform and definite composition
- inorganic chem
- study of chemicals that dont contain carbon, not found in nonliving things such as rocks
- homo
- composition is uniform throughout
- chemical property
- for a substance to undergoe a certain physical change
- reactant
- present at the start of the reaction
- extensive and intensive
- properties used to describe matter are what
- matter
- anything that has mass and takes up space
- examples for pure and applied chem are?
- Nylon and Aspirin
- microscopic
- world where you can only see objects that can be seen under magnification
- mixture
- blend of two or more components
- solid
- has deinfite shape and volume
- transfer of energy, change in color, production of gas
- clues for chemical change are?
- making observation, test hypothesis, develop a theory
- steps to the scientific method.
- phase
- used to describe any part of a sample with uniform composition and properties
- observation
- when you use your senses to obtain information
- filtration
- seperates a solid from the liquid in a hetero mixture
- volume
- measure of the space occupied by the object
- responding variable
- is observed during the experiment/ dependent variable
- chemical change
- produces matter with a different composition than original matter
- batteries
- is an example of storing energy
- hetero
- composition is not uniform throughout
- applied chem
- research that is directed toward a practical goal or application
- solution
- another name for homo
- Lavoisier
- helped transform chemistry from a science of observation to the science of measurement that it is today
- pollutant
- material found in air,water,or soil that is harmful to humans or other organisms
- organic chemistry, inorganic chemistry,biochemistry, analytical chemistry and physical chem.
- 5 traditional areas of study are
- lead
- example of a pollutant is
- experiment
- a procedure that is used to test a hypothesis
- products and reactants
- what are always equal in mass during a chemical reaction
- scientific method
- systematic aproach to the solution of a scientific problem
- vapor
- decribes the gaseous state of a substance that is generally a liquid or solid at room temp
- mass
- is a measure of the amount of matter the object contains
- macroscopic
- world of objects that are large enough to see with the unaided eye
- solid liquid gas
- 3 states of matter
- conserve energy, produce energy, and store energy
- chemists play an essential role in finding what
- scientific law
- is a concise statement that summarizes the results of many observations and experiments
- pure chem
- pursuit of chemicals knowledge for its own sake.
- element
- simplest form of matter
- law of conservation of mass
- what law states...in a physical change or chemical reaction mass is conserved. mass is neither created nor destroyed
- extensive property
- t depends on the amount of matter in a sample