Endothermic and Exothermic Reactions-Levings

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy to its surroundings, usually in the form of heat.

Front

Does photosynthesis involve an endothermic or exothermic reaction?

Back

Photosynthesis is an endothermic reaction because it absorbs sunlight energy.

Front

True or False: Exothermic reactions absorb energy.

Back

False. Exothermic reactions release energy.

Front

What happens to energy when bonds are formed?

Back

Energy is released when bonds are formed.

Front

True or False: In an endothermic reaction, energy is released.

Back

False. In an endothermic reaction, energy is absorbed.

Front

What is the main characteristic of exothermic reactions?

Back

Exothermic reactions are characterized by the release of energy.

Front

Give an example of an exothermic reaction.

Back

Combustion of fuels, such as burning wood or gasoline, is an example of an exothermic reaction.

Front

Give an example of an endothermic reaction.

Back

Photosynthesis is an example of an endothermic reaction.

Front

What is the role of sunlight in photosynthesis?

Back

Sunlight provides the energy needed for the endothermic reaction of photosynthesis.