Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove Ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

DCE Chem Unit 1

DCE Chemistry Unit 1 Vocabulary

TermDefinition
matter anything that has mass and occupies space
chemistry the study of the composition of matter and the changes that matter undergoes
scientific method a logical, systematic approach to the solution of a scientific problem (making observations, testing hypotheses, developing theories)
observation information obtained through the senses, often involving a measurement
hypothesis a proposed explanation for an observation
experiment a repeatable procedure that is used to test a hypothesis
independent variable the variable that is changed during an experiment, also called a manipulated variable
dependent variable the variable that is observed during an experiment, also called a responding variable
model a representation of an object or event
graduated cylinder glassware used for measuring volume of a liquid
beaker glassware used for containing and mixing but not for measuring
balance instrument used for measuring mass
significant figure the digits that can be known precisely in a measurement plus an estimated digit
density a measure of how packed together the particles in a substance are; mass divided by volume
mass the amount of matter in an object
volume the amount of space occupied by an object
physical change a change in appearance but not in identity
chemical change a change that produces a new substance
dimensional analysis a method of problem solving that uses the units to help solve the problem
combustion a chemical reaction in which a fuel and oxygen react to form carbon dioxide and water
precipitate a solid that forms and settles out of a liquid mixture
freezing point the temperature at which a liquid changes to a solid
melting point the temperature at which a solid changes to a liquid
signs of chemical change formation of a gas, formation of a precipitate, change in energy, change of color or odor
tare technique a technique for finding the mass of an object by using the balance to zero out the mass of the container
absolute technique a technique for finding the mass of an object by weighing the empty container and subtracting it from the mass of the container with the object in it
reactant material that is present at the start of a reaction
product material that is formed in a chemical reaction
solid state of matter that has a definite volume and definite shape
liquid state of matter that has a definite volume and does not have a definite shape
gas state of matter that has no definite volume and no definite shape
mixture a blend of two substances that are not chemically combined
heterogeneous mixture a mixture that is not uniform in composition
homogeneous mixture a mixture that is uniform in composition
element the simplest form of matter; cannot be broken down further by chemical means
compound a substance made of two or more elements that are chemically combined
freezing changing from the liquid state to the solid state, requires the removal of energy
melting changing from the solid state to the liquid state, requires the addition of energy
condensation changing from the gas state to the liquid state, requires the removal of energy
evaporation changing from the liquid state to the gas state, requires the addition of energy
sublimation changing from the solid state to the gas state without going through the liquid state
depositon changing from the gas state to the solid state without going through the liquid state
Created by: dcechem