Question

particles in each state of matter behave differently because they have different amounts of thermal energy. in a solid, the particles are held together tightly, and they do not move around freely. because the particles stay in about the same place, a solid generally keeps a certain shape. even though particles in a solid cannot move past one another, they are not completely still. the particles are constantly vibrating, or moving back and forth, in place. select all the true statements. particles in a solid are completely still. particles in a solid have thermal energy. particles in a solid are packed tightly.

Explanation:

• The text states that particles in a solid are not completely still but are constantly vibrating, so the statement "Particles in a solid are completely still" is false.
• It is mentioned that particles in each state of matter have different amounts of thermal energy, so particles in a solid have thermal energy.
• It is clearly said that in a solid, the particles are held together tightly, meaning they are packed tightly.

Answer:

• Particles in a solid have thermal energy.
• Particles in a solid are packed tightly.