Endothermic and Exothermic Reactions

Which of the following best describes an exothermic reaction?

• A reaction that absorbs energy from its surroundings.

• A reaction that releases stored energy.

• A reaction that requires sunlight to occur.

• A reaction that results in a temperature decrease.

Tags

NGSS.HS-PS1-4

What happens to the energy in the reactants during an exothermic reaction?

• It is absorbed and stored in the products.

• It is released as thermal energy.

• It remains unchanged.

• It is converted into potential energy.

Tags

NGSS.HS-PS1-4

Which of the following is an example of an endothermic reaction?

• Burning wood.

• Photosynthesis.

• Combustion of gasoline.

• Rusting of iron.

Tags

NGSS.HS-PS1-4

How can you identify an endothermic reaction based on temperature changes?

• The temperature of the products is higher than the reactants.

• The temperature of the products is lower than the reactants.

• The temperature remains constant.

• The temperature fluctuates randomly.

Tags

NGSS.HS-PS1-5

In the context of chemical reactions, what does kinetic energy refer to?

• Energy stored in chemical bonds.

• Energy associated with motion.

• Energy absorbed from the environment.

• Energy that remains potential.

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-2

NGSS.HS-PS3-4

Which of the following statements is true about the energy in photosynthesis?

• Energy is released as heat.

• Energy is absorbed and stored in glucose.

• Energy is converted into kinetic energy.

• Energy is lost to the environment.

Tags

NGSS.HS-LS1-5

What role does sunlight play in photosynthesis?

• It acts as a reactant.

• It provides the energy needed for the reaction.

• It is a product of the reaction.

• It cools down the reaction.

Tags

NGSS.HS-LS1-5

Which of the following is a characteristic of an exothermic reaction?

• The products have more stored energy than the reactants.

• The reaction absorbs energy from the surroundings.

• The reaction releases energy, often as heat or light.

• The reaction requires a decrease in temperature to proceed.

Tags

NGSS.HS-PS1-4

What is the main difference between endothermic and exothermic reactions in terms of energy?

• Endothermic reactions release energy, while exothermic reactions absorb energy.

• Endothermic reactions absorb energy, while exothermic reactions release energy.

• Both types of reactions absorb energy.

• Both types of reactions release energy.

Tags

NGSS.HS-PS1-4

Which of the following processes is an example of an exothermic reaction?

• Melting ice.

• Evaporating water.

• Burning a candle.

• Photosynthesis in plants.

Tags

NGSS.HS-PS1-4