Exothermic and Endothermic Reactions Quiz

What is an exothermic reaction?

• A reaction that absorbs energy from the surroundings

• A reaction that only occurs in living organisms

• A reaction that releases energy to the surroundings

• A reaction that neither absorbs nor releases energy

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

• Melting ice

• Photosynthesis

• Combustion

• Evaporation

What happens to the temperature during an endothermic reaction?

• It fluctuates

• It remains constant

• It decreases

• It increases

Which process is an example of an endothermic reaction?

• Combustion

• Photosynthesis

• Rusting

• Respiration

What is the scientific term for burning?

• Sublimation

• Oxidation

• Combustion

• Reduction

What is released during an exothermic reaction?

• Energy

• Matter

• Light only

• Sound

Which of the following reactions is exothermic?

• Combining sodium hydroxide with hydrochloric acid

• Dissolving ammonium nitrate in water

• Photosynthesis

• Mixing citric acid with baking soda

What is the main energy source for photosynthesis?

• Electricity

• Sound

• Heat

• Light

What is the effect of an exothermic reaction on its surroundings?

• It makes them darker

• It makes them quieter

• It makes them hotter

• It makes them colder

What is a common use of exothermic reactions?

• Cooling packs

• Air conditioners

• Hand warmers

• Refrigerators