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 Matter 40 Flashcards |
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What is matter? |
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Matter is anything that takes up space and has weight. |
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Which of the following is a characteristic of gases? A) Fixed shape B) Fixed volume C) Can flow D) Rigid structure |
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C) Can flow |
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Riddle: I have no fixed shape or volume, and I spread out to fill any container. What am I? |
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Gas |
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True or False: Molecules in solids can move freely. |
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False. Molecules in solids can only vibrate in their fixed positions. |
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The process through which a solid turns into a liquid is called ______. |
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Melting |
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What is the primary force that holds molecules together in solids? |
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Inter-molecular force |
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Which statement is true about liquids? A) They have a fixed shape B) They are incompressible C) They can flow D) They have the least inter-molecular space |
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C) They can flow |
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True or False: The boiling point of a liquid increases with the increase of pressure. |
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True |
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Riddle: I change from liquid to gas when heated, but my temperature stays the same during the process. What am I? |
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Liquid during boiling |
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Fill in the blanks: The space between molecules is called ______. |
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Inter-molecular space |
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What happens to the molecules in a solid when it is heated to its melting point? |
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The molecules gain enough energy to overcome the forces of attraction and move apart. |
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Which type of molecule consists of only one atom? |
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Monoatomic molecule |
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True or False: Evaporation occurs only at the boiling point. |
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False. Evaporation occurs at all temperatures. |
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In which state of matter do molecules have the highest kinetic energy? |
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Gas |
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Fill in the blanks: The change of a gas directly into a solid is called ______. |
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Deposition |
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What is the latent heat of fusion? |
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The amount of heat needed during melting of a substance. |
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Which of the following describes the attraction between molecules of different substances? A) Cohesion B) Adhesion C) Compression D) Tension |
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B) Adhesion |
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Riddle: I’m a solid that can turn directly into a gas, without becoming a liquid first. What am I? |
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Sublimating solid (like camphor) |
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True or False: The freezing point of a substance is always lower than its melting point. |
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False. The freezing point and melting point of a substance are the same. |
Card: 38 / 40 |
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What is the process called when a liquid turns into gas at a temperature below its boiling point? |
Card: 39 / 40 |
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Evaporation |
Card: 40 / 40 |
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