(Question)
Q: What type of energy is possessed by autumn leaves before they fall? Choices: - mechanical energy - kinetic energy - radioactive energy - potential energy A:
(Answer)
potential energy

(Question)
Q: What state of matter is characterized by tiny particles separated by large distances, which do not experience any force of attraction or repulsion with each other? Choices: - steam - emissions - liquids - gas A:
(Answer)
gas

(Question)
Q: What type of reactions form compounds? Choices: - mineral reactions - consumption reactions - physical reactions - chemical reactions A:
(Answer)
chemical reactions