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 clearly states that "Even though particles in a solid cannot move past one another, they are not completely still. The particles are constantly vibrating...", so the statement "Particles in a solid are completely still" is false.
• The first line of the text says "Particles in each state of matter behave differently because they have different amounts of thermal energy", and solids are a state of matter, so particles in a solid have thermal energy.
• The text mentions "In a solid, the particles are held together tightly", which means particles in a solid are packed tightly.

Answer:

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