UNIT 1 · STUDY GUIDE QUESTION 3

Shape, volume & particle attraction

Compare the shape, volume, and attractive forces of solids, liquids, and gases.

SIMPLIFIED SCIENTIFIC MODEL · TIME COMPRESSED · NOT TO SCALE

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Container width600

Sound volume65%

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Look for evidence

Switch among the three states and change container width. Track both the sample’s boundary and the particles.

MODEL NOTES

States of matter

Compare the same number of particles. Solids keep their shape and volume; liquids keep nearly the same volume but take the container’s shape; gases expand to fill the container. These are simplified models at ordinary conditions.

Solid: particles remain near fixed positions; attractions help resist changes in shape and volume.
Liquid: particles stay close but move past one another; volume changes very little.
Gas: particles are far apart and move freely; attractions have little effect in this model. Gas fills the available volume.

Use the model with your science journal and STEMscopedia. Answer the matching question in your own words, with evidence and an example as directed on your guide.