Which of the following statements best describes the arrangement of particles in a gas? [sm-1]
Which of the following statements best describes the arrangement of particles in a solid? [sm-2]
Which of the following statements best describes the arrangement of particles in a liquid? [sm-3]
Which of the following best describes what happens to the particles of water when it freezes? [sm-4]
Which of the following best describes what happens to the particles of ice when it melts? [sm-5]
Which of the following best describes what happens to the particles of water when it boils? [sm-6]
Which of the following best describes what happens to the particles of water vapour when it condenses? [sm-7]
Which of the following best describes what happens to the particles of water when it evaporates? [sm-8]
The table shows the melting points and boiling points of some substances. Which substance is a solid at 25oC? [sm-9]
The table shows the melting points and boiling points of some substances. Which substance is a liquid at 0oC? [sm-10]
The table shows the melting points and boiling points of some substances. Which substance is a gas at 0oC? [sm-11]
The table shows the melting points and boiling points of some substances. Which substance is a liquid at 30oC? [sm-12]
Air is in a bottle with a tight screw-top. When the bottle becomes warmer, the pressure inside increases because the molecules of air? [sm-13]
Air is in a bottle with a tight screw-top. When the bottle becomes cooler, the pressure inside decreases because the molecules of air? [sm-14]
When the air in a room becomes warmer a hanging balloon blown up with air becomes bigger because the molecules of air? [sm-15]
When the air in a room becomes warmer a hanging balloon blown up with air becomes smaller because the molecules of air? [sm-16]
The table shows the melting points and boiling points of some substances. Which substance is a liquid at 20 oC? [sm-17]
The table shows the melting points and boiling points of some substances. Which substance is a solid at 20oC? [sm-18]
The table shows the melting points and boiling points of some substances. Which substance is a gas at -60oC? [sm-19]
The table shows the melting points and boiling points of some substances. Which substance is a liquid at -10oC and a gas at 10oC? [sm-20]
Which of the following graphs represents how the temperature of liquid varies as it becomes a solid? [sm-21]
Which of the following graphs represents how the temperature of gas varies as it becomes a liquid? [sm-22]
Which of the following graphs represents how the temperature of solid varies as it becomes a liquid? [sm-23]
Which of the following graphs represents how the temperature of liquid varies as it becomes a gas? [sm-24]
Which of the following graphs represents how the temperature of gas varies as it eventually becomes a solid? [sm-25]
Which of the following graphs represents how the temperature of solid varies as it eventually becomes a gas? [sm-26]
























































Gases diffuse because they? [sm-48]
Liquids and dissolving solids diffuse because they? [sm-49]
The table below shows the melting points and boiling points of substances A to D. Which substance is suitable to use in a thermometer that measures in the range 10oC to 90oC? [sm-54]
The table below shows the melting points and boiling points of substances A to D. Which substance is suitable to use in a thermometer that measures in the range -120oC to 20oC? [sm-55]
The table below shows the melting points and boiling points of substances A to D. Which substance is suitable to use in a thermometer that measures in the range 0oC to 100oC? [sm-56]
The table below shows the melting points and boiling points of substances A to D. Which substance is suitable to use in a thermometer that measures in the range -4oC to 50oC? [sm-57]
Which of the following best explains why gases diffuse throughout a container? [sm-66]
Which of the following best explains why gases have a low density? [sm-67]