Question

which particle model best represents this scenario?

Explanation:

Step1: Analyze Heating Effect on Particles

When a substance is heated (like the liquid in the flask here), particles gain energy, move faster, and spread out (increased kinetic energy, more space between them).

Step2: Compare Particle Models

• Top model: Particles have more space between them, move more freely (longer "paths" or more distance, indicating higher energy/heating).
• Bottom model: Particles are closer, less spread out (lower energy, like before heating).

Since heating increases particle motion and spacing, the top model (with the first radio button selected, showing more spread-out particles) represents the heated scenario.

Answer:

The particle model with the upper radio button selected (the top - most particle diagram with more spaced - out particles)