Busy. Please wait.

Forgot Password?

Don't have an account?  Sign up 

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.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

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

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
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

Science Flashcards


Chemistry is the study of the properties of matter how matter changes.
Element Is a substance that cannot be broken into any other substances b chemical or physical means.
Compound Is a substance made of two or more elements chemically combined in a specific ration, or proportion.
Mixture Is made from two or more pure substances-elements, compounds, or both- that are in the same place but not combined as a new material.
Solution is a well-mixed mixture.
Precipitate A solid that forms from solution during a chemical reaction is called a
atom The smallest particle of an element is an
Molecule the combination of two or more atoms.
Chemical bonds The force that holds atoms together is called
Chemical equation is a shorter, easier way to show that chemical reactions, using symbols instead of words.
Symbol Most elements are represented by a one-letter or two-letter
Chemical formula A compound is represented by a "word", which shows the ratio of elements in the compound is called
subscript shows the number of atoms of an element in a molecule.
reactants The materials you have at the beginning of a chemical reaction are
products When the reaction is complete, you have different materials, called the ____ of the reaction.
Conservation of matter The principle stating that matter is not created or destroyed during a chemical reaction is
Coefficient is a number in front of a chemical formula in the equation.
Synthesis When two or more substances (elements or compounds) combine to make a more complex substance, the process is called
Decomposition reaction breaks down compounds into simpler products.
replacement reaction a reaction in which one element replaces another in a compound or in which two elements in different compounds trade places, is called a
Exothermic reaction A reaction that releases energy in the form of heat is called
endothermic reaction A reaction that absorbs energy is called an
Activation Energy is the minimum amount of energy that has to be added to start a reaction.
Concentration is 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 reactions take places.
inhibitor A material used to decrease the rate of a reaction is called an
Combustion a Rapid reaction between oxygen and a substance called a fuel
Fuel is a material that releases energy when it burns
Created by: teehee44