Grade 8 Review

This state of matter has a fixed volume but no fixed shape.

• Gas

• Liquid

• Solid

• All of the above

The state of a substance is influenced by the condition of these two variables.

• pressure and volume

• pressure and temperature

• temperature and volume

• none of the above

Which of the following does the KPT NOT do?

• It describes the states of matter.

• It explains the differences in the properties of solids, liquids, and gases.

• It explains the changes in the state of matter.

• It explains the chemical composition of matter.

Which of the following IS NOT a KPT description of solids?

• The particles of a solid are closely packed in an orderly manner.

• The forces of attraction are weaker than the kinetic energy present.

• Particles have enough energy to only vibrate and rotate about their fixed positions.

• Particles cannot move freely.

Which of the following is NOT a KPT description of liquids?

• The particles of a liquid are arranged in a disorderly manner.

• The forces of attraction are relatively weaker compared to the kinetic energy present.

• It has more kinetic energy than particles of the same substance in the solid state, and are not held in fixed positions.

• Particles move at high speeds and are very far apart.

This is the total energy of all the molecular motions inside an object

• heat

• temperature

• kinetic energy

• forces of attraction

This is the measure of the thermal energy of the molecules in a substance?

• heat

• temperature

• kinetic energy

• forces of attraction

During phase changes, heat is transformed into kinetic energy allowing particles to move around with more speed, and this increase in speed implies an increase in temperature.

• True

• False

During melting and boiling, heat added to matter will not cause an increase in temperature.

• True

• False

This change in state is due to the removal of energy from gas particles causing them to settle in fixed positions as a solid.

• boiling

• condensation

• deposition

• freezing

• melting