Properties and States of Matter

What does the kinetic theory say about the motion of atoms?

• Atoms are always in motion and the temperature affects their speed.

• Atoms are stationary and do not move.

• Atoms move only when observed.

• Atoms move in a predictable pattern.

Which of the following lists contains seven examples of physical properties?

• Color, odor, melting point, boiling point, density, solubility, hardness

• Color, taste, reactivity, flammability, density, solubility, hardness

• Color, odor, reactivity, flammability, density, solubility, hardness

• Color, taste, melting point, boiling point, reactivity, solubility, hardness

The composition of a compound is described by its:

• chemical formula

• physical state

• color

• density

What happens to the temperature of a substance during a phase change?

• The temperature increases.

• The temperature decreases.

• The temperature remains constant.

• The temperature fluctuates.

Chemical properties can be observed under what conditions?

• When a substance undergoes a chemical change

• When a substance is heated

• When a substance is cooled

• When a substance is mixed with water

Predicting: What happens to the pressure in a tire if air is slowly leaking out of the tire?

• The pressure increases.

• The pressure decreases.

• The pressure remains the same.

• The pressure fluctuates.

A pat of butter melts and then burns in a hot frying pan. Which of these changes is physical and which is chemical?

• Melting is physical, burning is chemical

• Melting is chemical, burning is physical

• Both are physical changes

• Both are chemical changes

What three factors affect gas pressure?

• Temperature, Volume, and Number of Molecules

• Temperature, Mass, and Density

• Volume, Density, and Mass

• Number of Molecules, Mass, and Density

The energy of a system changes during a phase change by:

• increasing as heat is absorbed or decreasing as heat is released

• remaining constant

• increasing only

• decreasing only

A gas is able to fill a container of any size or shape because:

• it has a definite shape and volume.

• its particles are in constant random motion.

• it is heavier than a solid or liquid.

• it is lighter than a solid or liquid.