States of matter and particle motion

9.Density is the amount of matter in a given space.

10.Match each state of matter with its description of particle arrangement.

11.Match each phase change with its description.

12.Arrange the following in order of increasing particle spacing: gas, liquid, solid.

13.Arrange the following phase changes in the order they occur when heat is added to a solid: evaporation, melting, heating.

14.Which of the following is true about the particles in a gas?

15.What happens to the density of a substance when it is heated?

16.Which of the following is an example of condensation?

17.In the chocolate chip experiment, why did the chocolate chips melt?

18.Which of the following are characteristics of solids? (Select all that apply)

19.Which of the following are phase changes that require cooling? (Select all that apply)

20.Which of the following factors affect the rate of diffusion? (Select all that apply)

21.Evaporation occurs only at the surface of a liquid, while boiling occurs throughout the liquid.

22.When a gas is cooled, its particles move faster.

23.Match each term with its definition.

24.Arrange the following steps in order of increasing particle motion: solid, liquid, gas.

25.Arrange the following phase changes in the order they occur when heat is continuously added to ice at 0°C until it becomes steam at 100°C.

26.During evaporation, individual particles at the surface of a liquid absorb enough energy to overcome the attraction of other particles and become a gas.

27.Which of the following best explains why a solid has a fixed shape?

28.When a substance is heated, its particles gain energy, move faster, and the space between them increases.

29.Match each term with its correct definition.

30.A student holds a chocolate chip in their hand for a few minutes. The temperature of the chocolate chip increases from 70°F to 85°F. Which of the following best explains the change in temperature of the chocolate chip?

31.In the hot water balloon activity, when the balloon is placed in cold water, the water vapor inside condenses and the balloon shrinks.

32.Arrange the following steps in the order they occur when a solid is heated until it becomes a gas: melting, evaporation, heating the solid.

33.In the hot water balloon activity, a balloon containing a small amount of water is heated in a microwave until it expands, then placed in cold water and shrinks. Which sequence of phase changes does the water undergo?

34.Fill in the blanks with the correct states of matter.

35.Fill in the blank with the correct term.

36.What is the term for the process when a liquid changes to a solid?

37.What is the term for the process when a solid changes to a liquid?

38.What is the term for the random movement of particles from a high concentration to a low concentration?

39.What is the density of a substance with a mass of 50 g and a volume of 20 cm³?

40.Fill in the blanks with the correct terms.

41.What is the term for the process when a gas changes directly to a solid?

42.What is the density of a substance with a mass of 260 g and a volume of 5060 cm³? Give your answer in g/cm³.

43.Explain why a solid has a fixed shape but a gas fills the shape of its container.

44.Explain what happens to the particles in a solid when heat is added and it changes to a liquid.

45.Why does oil float on top of water?

46.Explain why gases diffuse faster than liquids.

47.Describe how the particle model explains why a solid expands when heated.

48.What is the density of a substance with a mass of 50 g and a volume of 20 cm³?

49.What is the density of a substance with a mass of 260 g and a volume of 5060 cm³? Give your answer in g/cm³.

50.A particle model shows the atoms in a bridge at 18°C, evenly spaced in a grid. The student wants to make a new model to show the atoms after the bridge is heated to 23°C. Which change should the new model show?

51.The graph shows the temperature of a pot of sap as it is heated steadily over a wood fire. Points X and Y both sit on the flat part of the curve, after the sap has started boiling. Which statement best describes the temperature and the kinetic energy of the sap's particles between X and Y?

52.Water at room temperature is heated at a steady rate until it turns to steam. Time Period 1 is before boiling starts; Time Period 2 is while the water is boiling and turning to vapor. Match each change to the time period when it happens.