3 / 82 Which of the following is a characteristic of gases? A) Fixed shape B) Fixed volume C) Can flow D) Rigid
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5 / 82 Riddle: I am the state of matter that can flow and take the shape of my container. What am I?
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7 / 82 True or False: Molecules in a solid are free to move around.
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8 / 82 False. Molecules in a solid can only vibrate in their fixed positions.
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13 / 82 Which state of matter has the least inter-molecular space?
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15 / 82 True or False: The kinetic energy of molecules is highest in solids.
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16 / 82 False. The kinetic energy of molecules is highest in gases.
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17 / 82 Fill in the blank: The process of a solid turning into a liquid is called ______.
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19 / 82 What is the term for the force that holds molecules together?
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21 / 82 Which of the following has a fixed volume but no fixed shape? A) Solid B) Liquid C) Gas D) All of the above
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23 / 82 Riddle: I am a process when a liquid turns into gas at a fixed temperature. What am I?
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25 / 82 True or False: Evaporation occurs only at the boiling point of a liquid.
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27 / 82 Fill in the blank: The temperature at which a solid turns into a liquid is called the ______.
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29 / 82 What happens to the kinetic energy of molecules during melting?
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31 / 82 What is the primary reason solids have a definite shape?
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32 / 82 Strong inter-molecular forces keep the molecules in fixed positions.
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35 / 82 Riddle: I can turn from a solid directly to a gas without becoming a liquid first. What am I?
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37 / 82 True or False: The boiling point and condensation point of a substance are always the same.
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41 / 82 What is the effect of humidity on the rate of evaporation?
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43 / 82 Which state of matter has molecules that can slide over each other?
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45 / 82 Fill in the blank: When a gas cools and turns directly into a solid, this process is known as ______.
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49 / 82 Which of the following is an example of a polyatomic molecule? A) O₂ B) H₂O C) He D) N₂
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51 / 82 Riddle: I am a process when heat is removed from a gas, and it turns back into a liquid. What am I?
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53 / 82 True or False: Molecules in gases are closely packed together.
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55 / 82 What is the kinetic energy of molecules like in liquids compared to solids?
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56 / 82 In liquids, the kinetic energy is higher than in solids.
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57 / 82 Fill in the blank: The force of attraction between molecules of the same substance is called ______.
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59 / 82 What is the term for the process of a solid changing directly into a gas?
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63 / 82 Riddle: I am a slow process of a liquid turning into gas, happening at any temperature. What am I?
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65 / 82 True or False: The boiling point of a liquid decreases with the addition of impurities.
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67 / 82 The process of a liquid turning into gas at a fixed temperature is called ______.
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71 / 82 Fill in the blank: The amount of heat required to convert a liquid into vapor at its boiling point is called ______.
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73 / 82 What is the term used for the process of a solid turning into a liquid?
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76 / 82 False. Gases do not have a fixed shape or a fixed volume.
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77 / 82 Riddle: I am a state of matter that takes the shape of my container but has a fixed volume. What am I?
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79 / 82 The space between molecules in solids is very small, while in gases it is ______.
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81 / 82 Which of the following has the strongest intermolecular force? A) Gas B) Liquid C) Solid D) None of the above
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