Solids
Particles in solids are tightly packed in fixed positions. They vibrate but do not change places. This low kinetic energy gives solids a definite shape and volume.
Topic 1.2b – States of Matter Particle Movement
In this topic we develop and used models to describe the movement of particles in solids, liquids, gases, and plasmas states when thermal energy is added or removed. Take your guided video notes as you follow along with the video, complete the activities, and do amazing on your topic quiz!
📹 Video Notes
Phase Change Diagrams 101
Interactive video notes for FSI Courses. Complete all four sections, then submit for your total score.
🎯 Overall Progress 0%
📌 Key Concepts from the Video
- Temperature & heat energy share a direct relationship on a phase change diagram.
- Going UP the diagram → temperature ↑, kinetic energy ↑, potential energy ↓
- Going DOWN the diagram → temperature ↓, kinetic energy ↓, potential energy ↑
- Points: A = Solid · B = Melting/Freezing · C = Liquid · D = Boiling/Condensing · E = Gas
- Phase changes: Melting, Freezing, Boiling/Evaporating, Condensing
Section 1 – Fill in the Blank
Type the correct word(s) in each blank
Score: —
1 On a phase change diagram, temperature and heat energy have a relationship.
2 As you go up the phase change diagram, kinetic energy .
3 As you go down the phase change diagram, potential energy .
4 At Point A on the phase change diagram, the state of matter is a .
5 At Point B going up the diagram, the solid is into a liquid.
6 At Point D going down the diagram, the gas is into a liquid.
7 Kinetic energy and potential energy have an (or inverse) relationship.
8 At Point E, the particles are very spread apart and the state of matter is a .
Section 2 – Multiple Choice
Select the single best answer for each question
Score: —
1 What type of relationship exists between temperature and heat energy on a phase change diagram?
2 At Point C on the phase change diagram, what is the state of matter?
3 What happens to potential energy as you go up the phase change diagram?
4 At Point D going UP the diagram, what phase change is occurring?
5 Which point on the phase change diagram represents where a solid and liquid exist at equilibrium?
6 In a gas (Point E), how are the particles arranged?
Section 3 – Multi-Select
Select ALL correct answers — there may be more than one
Score: —
1 Which of the following increase as you go UP the phase change diagram? (Select all that apply)
2 Which of the following are phase changes discussed in the video? (Select all that apply)
3 Which statements are TRUE about a solid (Point A)? (Select all that apply)
4 Which of the following decrease as you go DOWN the phase change diagram? (Select all that apply)
Section 4 – Drag & Drop
Drag each term to the correct description
Score: —
Drag each term from the word bank below and drop it onto the matching description. You may drag terms back to the bank to swap them.
📦 Word Bank
Melting
Freezing
Boiling/Evaporating
Condensing
Solid
Liquid
Gas
Direct
🎯 Drop Zones — Match each term to its description
1. A phase change where a liquid turns into a gas by heating up.
Drop here
2. A phase change where a gas cools and turns into a liquid.
Drop here
3. The state of matter at Point A — particles tightly packed and vibrating in place.
Drop here
4. The state of matter at Point E — particles very spread apart, no definite shape or volume.
Drop here
5. The relationship between temperature and heat energy on a phase change diagram.
Drop here
6. A phase change where a liquid cools and turns into a solid (occurs at Point B going down).
Drop here
7. The state of matter at Point C — particles slightly further apart, definite volume but no definite shape.
Drop here
8. A phase change where a solid heats up and turns into a liquid (occurs at Point B going up).
Drop here
🎓 Your Final Score
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Fill in the Blank
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Multiple Choice
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Multi-Select
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Drag & Drop
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States of Matter: Particle Movement
8th Grade Physical Science • Georgia Standards of Excellence (S8P1) • Read • Explore • Practice
Liquids
Particles in liquids are close but can slide past each other. With medium kinetic energy, liquids have a definite volume but take the shape of their container.
Gases
Particles in gases are far apart and move quickly in all directions. High kinetic energy allows gases to change shape and volume to fill their container.
Average Kinetic Energy vs. Temperature
As temperature increases, average kinetic energy increases. Phase changes occur without a temperature change while energy is used to break or form intermolecular attractions.
Drag & Drop: Match the particle movement to the state
Tightly packed; vibrate in place
Close together; slide past
Far apart; rapid random motion
Solid
Liquid
Gas
Tip: You can drag with a mouse or touch. Keyboard users: focus a chip and press Enter to move it into a focused dropzone.
Milestones Practice (5 questions)
- 1) Which state of matter has particles with the lowest average kinetic energy?
- 2) When a liquid becomes a gas at its boiling point, the temperature stays nearly constant because energy is used to:
- 3) Which diagram best represents a gas?
- 4) As temperature increases, average kinetic energy of particles generally:
- 5) Which statement explains why liquids take the shape of their container?
Alignment: Georgia Standards of Excellence S8P1 — Matter in the solid, liquid, and gas phases and how particle motion explains macroscopic properties.