Question

what has occurred if a decrease in temperature accompanies a reaction?
energy was absorbed.
energy was created.
energy was released.
energy was destroyed.

Explanation:

In an endothermic reaction, energy is absorbed from the surroundings. When energy is absorbed, the temperature of the surroundings (which is part of the reaction context here) decreases. According to the law of conservation of energy, energy cannot be created or destroyed (so options "Energy was created" and "Energy was destroyed" are wrong). If energy was released (exothermic reaction), the temperature would increase.

Answer:

Energy was absorbed.