Daily Warm Up: Chemistry Part 1

Explain the Law of Conservation of Mass. The Law of Conservation of Mass states that the mass of the reactants in a chemical reaction must equal the mass of the products.

• The mass of the reactants is greater than the mass of the products.

• The mass of the reactants is less than the mass of the products.

• The mass of the reactants is equal to the mass of the products.

• The mass of the reactants is unrelated to the mass of the products.

What is a physical change?

• A change in which the substance's chemical identity is altered

• A change that involves the formation of new substances

• A change that is irreversible

• A change in which the substance's physical properties are altered but its chemical identity remains the same

What is a synthesis reaction?

• A reaction where two or more substances combine to form a new compound

• A reaction where a compound breaks down into two or more simpler substances

• A reaction where elements are exchanged between compounds

• A reaction that releases energy in the form of heat or light

What is a Single Replacement Reaction?

• A reaction where one element replaces another in a compound

• A reaction where two elements combine to form a compound

• A reaction where a compound breaks down into two or more elements

• A reaction where elements are exchanged between two compounds

A molecule is:

• a single atom

• a group of atoms bonded together

• a type of chemical reaction

• a form of energy

Reactants in a chemical reaction are:

• the substances that are produced in the reaction

• the substances that are consumed in the reaction

• the substances that act as catalysts

• the substances that do not participate in the reaction

The products in a chemical reaction are:

• Reactants

• Catalysts

• Products

• Inhibitors

What is a Combustion Reaction?

• A reaction involving the rapid combination of a substance with oxygen to produce heat and light

• A reaction involving the slow combination of a substance with nitrogen

• A reaction that occurs only in the presence of water

• A reaction that produces only carbon dioxide and water

A catalyst in a chemical reaction is:

• a substance that increases the rate of a reaction without being consumed

• a reactant that is completely used up in a reaction

• a product formed in a chemical reaction

• a substance that decreases the rate of a reaction

What is a chemical change?

• A process where substances combine or break apart to form new substances.

• A change in the state of matter without forming new substances.

• A temporary change in the appearance of a substance.

• A change that can be easily reversed.