chemical change and Modeling chemical reaction

Substances that undergo chemical changes are called?

• Products

• Reactants

• ingredients

• Material

the numbers in front of each component in the equation show how many particles of the reactants are needed and how many particles of the products are formed during the reaction. these numbers called?

• product

• Coefficients

• digram

During a chemical reaction, matter is neither created nor destroyed. this is ?

• the law of conservation of mass

• cell theory

• states of matter

A system where matter can enter and escape is called?

• Open System

• Closed System

a better place in which to measure the movement of matter and study reactions that involve gas?

• Closed System

• Open System

When two or more elements or compounds combine to make a more complex substances, it's called?

• Decomposition reaction

• Synthesis reaction

• Replacement

the reaction un which compounds break down into simpler products it's called

• Synthesis

• Replacement

• Decomposition

when one element replaces another element in a compound, or if two elements in different compounds trade places it's called?

• Synthesis

• Replacement

• Decomposition

A change in matter that produces one or more new substances is called?

• Chemical change

• Physical change

• compound

Bending, crushing, cutting, melting , and freezing are all chemical change?

• True

• False