Model States of Matter - Middle School Physical Science
Card 1 of 25
What is the particle-level motion of a solid at constant temperature?
What is the particle-level motion of a solid at constant temperature?
Tap to reveal answer
Particles vibrate in place around fixed positions. Thermal energy causes oscillation without changing positions.
Particles vibrate in place around fixed positions. Thermal energy causes oscillation without changing positions.
← Didn't Know|Knew It →
What change in a particle model represents evaporation/boiling (liquid to gas)?
What change in a particle model represents evaporation/boiling (liquid to gas)?
Tap to reveal answer
Particles gain enough energy to spread far apart and escape the liquid. Heat breaks remaining attractions between particles.
Particles gain enough energy to spread far apart and escape the liquid. Heat breaks remaining attractions between particles.
← Didn't Know|Knew It →
What is the particle-level arrangement of a solid (spacing and order)?
What is the particle-level arrangement of a solid (spacing and order)?
Tap to reveal answer
Particles are tightly packed in a fixed, orderly arrangement. Strong forces hold particles in crystal-like structures.
Particles are tightly packed in a fixed, orderly arrangement. Strong forces hold particles in crystal-like structures.
← Didn't Know|Knew It →
What change in a particle model represents condensation (gas to liquid)?
What change in a particle model represents condensation (gas to liquid)?
Tap to reveal answer
Particles lose energy, move slower, and come closer together. Cooling strengthens attractions, pulling particles together.
Particles lose energy, move slower, and come closer together. Cooling strengthens attractions, pulling particles together.
← Didn't Know|Knew It →
Identify the state: particles are far apart, moving fast, and filling the container.
Identify the state: particles are far apart, moving fast, and filling the container.
Tap to reveal answer
Gas. Matches gas properties: spread out, high energy.
Gas. Matches gas properties: spread out, high energy.
← Didn't Know|Knew It →
Identify the state: particles are tightly packed, ordered, and only vibrate in place.
Identify the state: particles are tightly packed, ordered, and only vibrate in place.
Tap to reveal answer
Solid. Matches solid properties: fixed, ordered structure.
Solid. Matches solid properties: fixed, ordered structure.
← Didn't Know|Knew It →
What change in a particle model represents melting (solid to liquid)?
What change in a particle model represents melting (solid to liquid)?
Tap to reveal answer
Particles gain energy and break out of fixed positions to slide. Heat overcomes forces holding particles in place.
Particles gain energy and break out of fixed positions to slide. Heat overcomes forces holding particles in place.
← Didn't Know|Knew It →
What change in a particle model represents freezing (liquid to solid)?
What change in a particle model represents freezing (liquid to solid)?
Tap to reveal answer
Particles lose energy and become locked into fixed positions. Cooling reduces motion until particles can't flow.
Particles lose energy and become locked into fixed positions. Cooling reduces motion until particles can't flow.
← Didn't Know|Knew It →
Which model best matches a gas: strong attractions, moderate attractions, or weak attractions?
Which model best matches a gas: strong attractions, moderate attractions, or weak attractions?
Tap to reveal answer
Weak attractions between particles. Gas particles have minimal intermolecular forces.
Weak attractions between particles. Gas particles have minimal intermolecular forces.
← Didn't Know|Knew It →
What happens to particle speed when temperature increases in any state of matter?
What happens to particle speed when temperature increases in any state of matter?
Tap to reveal answer
Average particle kinetic energy increases, so particles move faster. Temperature directly relates to particle kinetic energy.
Average particle kinetic energy increases, so particles move faster. Temperature directly relates to particle kinetic energy.
← Didn't Know|Knew It →
What is the main reason gases are easy to compress in a particle model?
What is the main reason gases are easy to compress in a particle model?
Tap to reveal answer
There is a large amount of empty space between particles. Particles can be pushed closer by reducing gaps.
There is a large amount of empty space between particles. Particles can be pushed closer by reducing gaps.
← Didn't Know|Knew It →
What is the main reason solids are difficult to compress in a particle model?
What is the main reason solids are difficult to compress in a particle model?
Tap to reveal answer
There is very little empty space between particles. Particles already touch; no room to squeeze closer.
There is very little empty space between particles. Particles already touch; no room to squeeze closer.
← Didn't Know|Knew It →
Which state of matter has neither a definite shape nor a definite volume?
Which state of matter has neither a definite shape nor a definite volume?
Tap to reveal answer
Gas. Particles expand to fill any available space.
Gas. Particles expand to fill any available space.
← Didn't Know|Knew It →
Which state of matter has a definite volume but no definite shape?
Which state of matter has a definite volume but no definite shape?
Tap to reveal answer
Liquid. Takes container shape due to particle mobility.
Liquid. Takes container shape due to particle mobility.
← Didn't Know|Knew It →
Which state of matter has a definite shape and a definite volume?
Which state of matter has a definite shape and a definite volume?
Tap to reveal answer
Solid. Strong forces maintain both structure and boundaries.
Solid. Strong forces maintain both structure and boundaries.
← Didn't Know|Knew It →
What is the particle-level motion of a gas at constant temperature?
What is the particle-level motion of a gas at constant temperature?
Tap to reveal answer
Particles move rapidly and randomly in all directions. High kinetic energy overcomes weak intermolecular forces.
Particles move rapidly and randomly in all directions. High kinetic energy overcomes weak intermolecular forces.
← Didn't Know|Knew It →
What is the particle-level arrangement of a gas (spacing and order)?
What is the particle-level arrangement of a gas (spacing and order)?
Tap to reveal answer
Particles are far apart with no fixed order. Minimal attractions let particles spread throughout space.
Particles are far apart with no fixed order. Minimal attractions let particles spread throughout space.
← Didn't Know|Knew It →
What is the particle-level motion of a liquid at constant temperature?
What is the particle-level motion of a liquid at constant temperature?
Tap to reveal answer
Particles slide past one another and flow. Weak attractions allow movement while maintaining contact.
Particles slide past one another and flow. Weak attractions allow movement while maintaining contact.
← Didn't Know|Knew It →
What is the particle-level arrangement of a liquid (spacing and order)?
What is the particle-level arrangement of a liquid (spacing and order)?
Tap to reveal answer
Particles are close together but not fixed; they are disordered. Particles have enough energy to move but stay attracted.
Particles are close together but not fixed; they are disordered. Particles have enough energy to move but stay attracted.
← Didn't Know|Knew It →
Which state of matter has neither definite shape nor definite volume at the particle level?
Which state of matter has neither definite shape nor definite volume at the particle level?
Tap to reveal answer
Gas. Particles spread to fill any container completely.
Gas. Particles spread to fill any container completely.
← Didn't Know|Knew It →
Which state of matter is most compressible because particles are far apart?
Which state of matter is most compressible because particles are far apart?
Tap to reveal answer
Gas. Large spaces between particles allow compression.
Gas. Large spaces between particles allow compression.
← Didn't Know|Knew It →
Which state of matter is least compressible because particles are tightly packed?
Which state of matter is least compressible because particles are tightly packed?
Tap to reveal answer
Solid. No space between particles prevents compression.
Solid. No space between particles prevents compression.
← Didn't Know|Knew It →
What particle-level change occurs during melting (solid to liquid)?
What particle-level change occurs during melting (solid to liquid)?
Tap to reveal answer
Particles gain energy and break from fixed positions to slide. Heat energy overcomes forces holding particles in place.
Particles gain energy and break from fixed positions to slide. Heat energy overcomes forces holding particles in place.
← Didn't Know|Knew It →
Identify the state: particles are close together, disordered, and able to flow past each other.
Identify the state: particles are close together, disordered, and able to flow past each other.
Tap to reveal answer
Liquid. Flowing ability indicates particles aren't fixed.
Liquid. Flowing ability indicates particles aren't fixed.
← Didn't Know|Knew It →
What particle-level change occurs during deposition (gas to solid)?
What particle-level change occurs during deposition (gas to solid)?
Tap to reveal answer
Particles lose energy and form a solid without becoming liquid. Direct bonding occurs when gas particles lose energy.
Particles lose energy and form a solid without becoming liquid. Direct bonding occurs when gas particles lose energy.
← Didn't Know|Knew It →