States of Matter

• What is the formula for calculating density?

  Density = mass / volume
• How does changing the state of a substance affect its density?

  Changing the state of a substance generally decreases its density from solid to liquid to gas.
• What are the three states of matter and their characteristics?

  • Solids: Molecules arranged in a regular rigid structure.
  • Liquids: Molecules in contact but free to move and flow around each other.
  • Gases: Molecules spread out and move randomly.
• Why do solids and liquids generally have higher densities than gases?

  Solids and liquids have tightly packed molecules, resulting in a larger mass in a given volume.
• What is an exception to the general rule that liquids are denser than solids?

  Ice is less dense than water.
• Why do gases have low densities compared to solids and liquids?

  Gases have molecules that are spread out over a large volume, resulting in more empty space and less mass in a given volume.
• What resources does Launchpad Learning offer for GCSE revision?

  • Interactive quizzes
  • Easy to follow videos
  • AI tutor support
  • Comprehensive coverage of the specification
• What is the purpose of the Launchpad Learning platform?

  To help students achieve top results in their exams.
• How does the Launchpad Learning platform make revision fun?

  By using interactive quizzes and engaging videos.
• What type of learning support does the AI tutor provide on Launchpad Learning?

  Support every step of the way in the revision process.
• What is the significance of the arrangement of molecules in solids, liquids, and gases?

  • Solids: Tightly packed, regular arrangement leads to high density.
  • Liquids: Close contact but free movement leads to slightly lower density.
  • Gases: Spread out, random movement leads to low density.