Question

understanding key ideas

1. one property that all particles of matter have in common is they

a. never move in solids.
b. only move in gases.
c. move constantly.
d. none of the above

1. describe solids, liquids, and gases in terms of shape and volume.

Explanation:

Step1: Recall particle - motion in matter

Particles of matter are in constant motion regardless of the state (solid, liquid, gas). In solids, particles vibrate in place; in liquids, they move more freely than in solids; and in gases, they move rapidly and randomly. So for question 2, the answer is that particles move constantly.

Step2: Describe states of matter

Solids have a definite shape and a definite volume because the particles are closely packed and have limited movement. Liquids have an indefinite shape (take the shape of their container) but a definite volume as the particles can move past each other but are still close - together. Gases have an indefinite shape and an indefinite volume as the particles are far apart and move freely.

Answer:

1. c. move constantly.
2. Solids: definite shape, definite volume; Liquids: indefinite shape, definite volume; Gases: indefinite shape, indefinite volume.