Answer:
Explanation: Atoms lose energy when they change from solid to liquid or gas and quid to gas. Explanation: Energy is always involved in changes of state.
False. Pure substances that cannot be broken down into simpler substances by ordinary chemical means are called Elements.
Answer:
They increase the levels of catecholamines—a family of brain chemicals that includes dopamine.
Explanation:
Stimulants are a class of drugs that “stimulate” the body's central nervous system, which includes the brain and spinal cord. They increase the levels of catecholamines—a family of brain chemicals that includes dopamine. These chemicals are used in the brain processes to signal reward and motivation.