H 2 O: _____________________ CO 2 : _____________________ O 2 : ______________________ CH 4 : _____________________ A chemical reaction is when two molecules come together and undergo chemical change to form new substances with new properties.
(A chemical reaction; is; T:when two molecules come together and undergo chemical change) (two molecules; come; together) (two molecules; undergo; chemical change; to form new substances with new properties)
A chemical reaction two molecules two molecules
is come undergo
T:when two molecules come together and undergo chemical change
together
chemical change to form new substances with new properties