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What is a chemical reaction?

• The process by which atoms or groups of atoms in substances are reorganized into different substances

• The process by which macromolecules react to substances which form a product

• The process by which a chemical releases exothermic heat to start a recation

• The process by which a chemical uses endothermic heat to start a reaction

What is a reactant?

• Substances that exist before the chemical reaction starts

• Substances that are formed by a chemical reaction

• Substances that are changed by a chemical reaction

• Substances that are eliminated before the chemical reaction starts

Where are reactants located on the chemical equation?

• The right side of the arrow

• Above the arrow on the right side

• The left side of the arrow

• Below the arrow of the lef side

Where are the products located on the chemical equation?

• The left side of the arrow

• The right side of the arrow

• They are not in the equation

• They are located after the equal sign

What is a product?

• Substances that are not effected by the chemical reaction

• Substances changed by a chemical reaction

• Macromolecules destroyed in a chemical reaction

• Substances formed by a chemical reaction

Most compounds in, living things cannot undergo chemical reactions without energy. This energy is often

called the _______.

• Activation energy

• Activator

• Deactivation energy

• Macromolecule

What is activation energy?

• The maximum amount of energy needed for reactants to form products in a chemical reaction

• The maximum amount of energy needed for reactants to form reactants in a chemical reaction

• The minimum amount of energy needed for reactants to form reactants in a chemical reaction

• The minimum amount of energy needed for reactants to form products in a chemical reaction

Reactants that release energy in the heat form

• Exothermic reactions

• Endothermic reactions

• Activation energy

• Macromolecules

Reactants that absorb energy in the heat form

• Antifreeze reactions

• Exothermic reactions

• Endothermic reactions

• Combustion reactions

If there is a chemical reaction and it feels cold then it is a ____.

• All reactions give off heat

• It is only possible in a perfect world to have cold chemical reactions

• Exothermic reaction

• Endothermic reaction