📚 Topic Summary
Matter exists in different states: solid, liquid, and gas. These states are determined by how the particles (atoms or molecules) are arranged and how strongly they interact. In a solid, particles are tightly packed and vibrate in fixed positions. In a liquid, particles are close together but can move around. In a gas, particles are widely spaced and move freely.
Particle models are diagrams that represent the arrangement and behavior of particles in different states of matter. By examining these models, you can identify whether the substance is a solid, liquid, or gas.
🧪 Part A: Vocabulary
Match the following terms with their definitions:
- Term: Solid
- Term: Liquid
- Term: Gas
- Term: Particle
- Term: State of Matter
- Definition: A substance with closely packed particles that can move around.
- Definition: A substance with widely spaced particles that move freely.
- Definition: A tiny piece of matter, such as an atom or molecule.
- Definition: A substance with tightly packed particles that vibrate in fixed positions.
- Definition: The physical condition of a substance (e.g., solid, liquid, gas).
💧 Part B: Fill in the Blanks
Complete the following paragraph using the words: solid, liquid, gas, particles, move.
In a ____, the ____ are tightly packed and vibrate in fixed positions. In a ____, the particles are close together and can ____ around. In a ____, the particles are widely spaced and move freely.
🤔 Part C: Critical Thinking
Explain how particle models help us understand the differences between solids, liquids, and gases.