Question

what model states that particles of matter are always in motion?
the properties of weight
kinetic theory model
newtons third law of motion

Explanation:

• "The properties of weight" is about the characteristics of weight, not related to particles of matter being in motion.
• The Kinetic Theory (or Kinetic Molecular Theory) states that particles of matter are always in motion (they have kinetic energy).
• Newton's third law of motion is about action - reaction pairs (e.g., for every force, there is an equal and opposite force), not about the general motion of matter's particles.

Answer:

B. Kinetic theory model