Question

1. which state of matter is characterized by having a definite shape and a definite volume?

a. solid only
b. liquid only
c. both b and c
d. gas

1. the state of matter differs in many ways, including shape and volume. the following three figures show the particles in a solid, a liquid and a gas. which of the following correctly identifies the state of matter?

a. 3: gas
b. 2: solid
c. 1: liquid
d. 2: liquid

1. which of the following is a physical property of a substance in the liquid state?

a. definite shape
b. indefinite mass
c. not easily compressed
d. definite volume

1. which of the following is a physical change?

a. evaporation
b. explosion
c. rotting of food
d. corrosion

1. there are different characteristics for each of the states of matter. which statement describes a difference between liquids and solids?

a. temperature can change a solid to a liquid, but it cannot change a liquid to a solid.
b. solids have a definite volume and liquids do not have a definite volume.
c. the particles in a solid are much closer together than the particles in a liquid.

Explanation:

1. Solids have a definite shape and definite volume due to closely - packed particles. Liquids have a definite volume but take the shape of their container, and gases have neither definite shape nor definite volume.
2. In a solid, particles are closely packed in an orderly arrangement (figure 2). In a liquid, particles are close but can move around each other (figure 3). In a gas, particles are far apart and move freely (figure 1).
3. Liquids have a definite volume as the particles are close enough together that they cannot be easily compressed. They do not have a definite shape and have a definite mass.
4. Evaporation is a physical change where a substance changes from liquid to gas without changing its chemical composition. An explosion, rotting of food, and corrosion are chemical changes as new substances are formed.
5. The particles in a solid are much closer together than the particles in a liquid. Temperature can change a solid to a liquid (melting) and a liquid to a solid (freezing). Both solids and liquids have a definite volume.

Answer:

1. a. solid only
2. b. 2: solid
3. c. not easily compressed, d. definite volume
4. a. evaporation
5. c. The particles in a solid are much closer together than the particles in a liquid.