Mississippi Science P.7.5B

P.7.5B is a cluster heading. These are the individual standards under it.

• P.7.5B.1

  Make predictions about the effect of temperature and pressure on the relative motion of atoms and molecules (speed, expansion, and condensation) relative to rec...

• P.7.5B.2

  Use evidence from multiple scientific investigations to communicate the relationships between pressure, volume, density, and temperature of a gas.

• P.7.5B.3

  Ask questions to explain how density of matter (observable in various objects) is affected by a change in heat and/or pressure.

01

What Students Need to Do

Students predict how heating, cooling, and squeezing affect particle speed, spacing, and changes of state. They use two gas investigations to explain changes in pressure, volume, and density. They ask how heat or pressure can change an object's density.

02

What Mastery Looks Like

A student explains that warming usually makes particles move faster, while squeezing a gas packs the same particles into less space and raises its density. They use results from a syringe and a balloon to support their predictions. They know cooling can slow particles enough for a gas to condense.

03

Common Misconceptions

Students may think gas particles themselves grow when heated, rather than moving farther apart. Some assume squeezing a gas always makes its particles move faster. Others think the amount of gas changes when its volume changes.

04

How to Assess It

Exit ticket: A capped syringe is pushed to half its volume, and a balloon is warmed. Predict what happens to the pressure or volume, particle speed, and density in each, using evidence from both investigations.

1. 01

   Seal a syringe tip and push its plunger, then move a balloon-topped bottle between warm and cold water; record both volume changes.

2. 02

   Ask students to write: Why does air in a squeezed syringe get denser, while air in a warmed balloon spreads out?

3. 03

   Give pairs particle cards showing gas before and after heating, cooling, or compression; have them sort the cards and explain speed and spacing.

4. 04

   Show a self-healing screen protector package; ask how gentle warming might help its polymer chains move and close a small scratch.

• P.K.5A

  Students will demonstrate an understanding of the solid and liquid states of matter.

• P.3.5

  Students will demonstrate an understanding of the physical properties of matter to explain why matter can change states between a solid, liquid, or gas dependen...

• P.7.5A

  Students will demonstrate an understanding of the physical and chemical properties of matter.

• P.5.5A

  Students will demonstrate an understanding of the physical properties of matter.