1aEasy1 mark
Which state has a fixed volume but no fixed shape?
Particle Model and Diffusion Assessment
9 questions · 12 parts · 25 marks
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2aMedium1 mark
A gas spreads 12 cm in 30 s. Its average spreading rate is ____ cm/s.
Answer
2bHard3 marks
Create a clear annotated answer on the canvas. Use a diagram, graph, flowchart, equation layout and/or concise labels to show your reasoning.
Explain why ammonia and hydrogen chloride gases form a ring nearer the hydrogen chloride end when they diffuse along a tube.
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3aEasy1 mark
How are particles arranged in a solid?
3bEasy1 mark
What happens during melting?
4aEasy1 mark
What is diffusion?
5aEasy1 mark
Why does diffusion speed up at higher temperature?
5bEasy1 mark
What is absolute zero?
6aMedium2 marks
Method practice — The Kinetic Particle Theory. Put the lesson’s actual method into a dependable order before using it on a new case.
- 1.AThe state of a substance depends on the balance between the kinetic energy of its particles and the forces of attraction holding them together.
- 2.BThere are forces of attraction between the particles. The closer together they are, the stronger the effect of these forces.
- 3.CThese particles are in constant motion . The higher the temperature, the greater their kinetic energy and the faster they move.
- 4.DAll matter is made up of tiny particles — atoms, molecules or ions.
7aHard4 marks
Additional practice — The Three States of Matter. Explain the mechanism, relationship, decision, or calculation in this lesson-specific case from “The Three States of Matter”: card The three states compared Particles are very close together in a regular arrangement . They vibrate about fixed positions but cannot move past one another. Forces of attraction are strong . Particles are close together but randomly arranged . They can move past one another , so the liquid flows. Forces of attraction are weaker than in a solid. Particles are far apart and randomly arranged . They move quickly in all directions . Forces of attraction…
Working and final answer
0 words
8aHard5 marks
Independent transfer — Particle Model and Diffusion. Change one meaningful feature of this lesson case, then solve and check the revised problem: Explain the mechanism, relationship, decision, or calculation in this lesson-specific case from “Changes of State”: timeline The five changes of state Energy is supplied. Particles vibrate more until they have enough energy to overcome some of the forces of attraction and break out of their fixed positions. Energy is supplied. Particles gain enough energy to overcome the forces of attraction completely and escape from the liquid. Occurs throughout the liquid at the boiling point. Only the most energetic particles at the surface escape. Occurs at any temperature below… Your variation must still address “State the distinguishing properties of solids, liquids and gases.”.
Your new case, method, check, and conclusion
0 words
9aHard4 marks
Representation practice — Particle Model and Diffusion. Create a labelled diagram, graph, table, model, flowchart, equation layout, or annotated explanation that makes the reasoning in this case visible: Explain the mechanism, relationship, decision, or calculation in this lesson-specific case from “Heating and Cooling Curves”: A heating curve plots temperature against time as a substance is heated steadily from solid to gas. Its most striking feature is the two flat sections , where energy is being supplied but the temperature does not rise. timeline Reading a heating curve, section by section Energy increases the kinetic energy of the particles, so they vibrate faster and the temperature rises . Temperature stays constant at the melting point . Energy is used to overcome…
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