Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


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.
Don't know
remaining cards
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:
restart all cards
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


chemistry the study of the properties of matter and how matter changes
element a substance that cannot be broken down into any other substances by chemical or physical means
compound a substance made of two or more elements, chemically combined in a specific ration, or proportion
mixture made from two or more pure substances-elements, compound, or both- that are in the same place but not combined as a new material
solution a well-mixture
physical a changes that alters the form or appearance of a material but does not make the material into another substance
chemical change a change in matter that produces new substances
precipitate a solid that form from solution during a chemical reaction
atom the smallest particles of an element
molecule the combination of two or more atom
chemical bond the force that hold atoms together
chemical equation a shorter, easier way to show chemical reactions, using symbols instead of words
symbol most element are represented by a one-letter or two- letter
chemical formula which shows the ratio of element in the compound
subscript show the number of atom of an element in a molecule
reactants the materials you have at the beginning of chemical reaction
products when the reaction is complete you have different materials
coefficient a number in front of a chemical formula in the equation
synthesis when two or more substances (element or compounds) combine to make a more complex substance the process
decomposition reaction breaks down compounds into simpler products
replacement reaction a reaction in which one element replace another in a compound or in which two element in different compound trade places
exothermic reaction a reaction that releases energy in the form of heat
endothermic reaction a reaction that absorbs energy
activation energy the minimum amount of energy that has to be added to start a reaction
concentration the amount of one material in a given volume of another material
catalyst a material that increases the rate of a reaction by lowering the activation energy
enzymes provide a surface on which reaction take place
inhibitor a material used to decrease the rate of reaction
combustion a rapid reaction between oxygen and a substance called a fuel
fuel a material the releases energy when it burns
Created by: magz25