5. using circles to represent particles, draw a diagram that compares the arrangement of particles in the…

5.

Brief Explanations:

In a solid, particles are closely packed in an orderly arrangement. In a liquid, particles are close - together but can move past one another. In a gas, particles are far apart and move freely. So for the solid, draw circles tightly packed in rows. For the liquid, draw circles close to each other but in a less orderly way. For the gas, draw circles spread out with large spaces between them.

Answer:

Draw circles tightly packed in rows for solid, circles close to each other in a less - orderly way for liquid, and circles spread out with large spaces between them for gas.

6.

Brief Explanations:

In physical changes like melting or boiling, energy is used to change the state of matter by overcoming intermolecular forces. In chemical changes, energy is involved in breaking and forming chemical bonds. Endothermic reactions absorb energy and exothermic reactions release energy.

Answer:

In physical changes, energy overcomes intermolecular forces for state - change. In chemical changes, energy is used for bond - breaking and bond - forming, with endothermic reactions absorbing and exothermic reactions releasing energy.