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

What is a common sign that a chemical reaction has occurred?

Back

The appearance of bubbles of gas is a common sign that a chemical reaction has occurred.

Front

Is photosynthesis an endothermic or exothermic reaction?

Back

Photosynthesis is an endothermic reaction.

Front

What happens to energy during an exothermic reaction?

Back

Energy is released during an exothermic reaction.

Front

What happens to energy during an endothermic reaction?

Back

Energy is absorbed during an endothermic reaction.

Front

What is the process called when iron nails get rusty?

Back

The rusting of iron nails is an exothermic process.

Front

What is nuclear fission?

Back

Nuclear fission is the process of splitting large atomic nuclei into smaller ones, releasing energy.

Front

What is nuclear fusion?

Back

Nuclear fusion is the process of joining small atomic nuclei to form a larger nucleus, releasing 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.