Chemical Reactions, Matter and Energy

in a chemical equation, the reactants are on which side of the arrow?

• top
• right
• left
• bottom

In a chemical equation, the products are on which side of the arrow?

• top
• right
• left
• bottom

In a chemical equation, what is a subscript and what does it tell you?

• the larger number in the front of the chemical formula that tells you the number of molecules in the reaction
• the smaller number after the chemical symbol that tells you the number of molecules in the reaction
• the larger number in the front of the chemical formula that tells you the number of atoms per molecule in the reaction
• the smaller number after the chemical symbol that tells you the number of atoms per molecule in the reaction

In a chemical equation, what is a cofeeicient and what does it tell you?

• the larger number in the front of the chemical formula that tells you the number of molecules in the reaction
• the smaller number below the chemical symbol that tells you the number of molecules in the reaction
• the larger number in the front of the chemical formula that tells you the number of atoms per molecule in the reaction
• the smaller number below the chemical symbol that tells you the number of atoms per molecule in the reaction

In an exothermic reaction, energy is ________.

• Absorbed
• Released

In an endothermic reaction, energy is ________.

• absorbed
• released

Reactants + Energy → _________

• Atoms
• Molecules
• Products
• Energy

Which reaction is endothermic?

• Cellular Respiration
• Cold packs
• Iron Rusting
• Burning Wood

Is photosynthesis an exothermic or endothermic reaction?

• Endothermic
• Exothermic
• Both
• Neither

Baking bread and cooking an egg are examples of....?

• Endothermic reactions
• Exothermic reactions