Mississippi Science CHE.7.5
The Standard
- CHE.7
- Students will demonstrate an understanding of the structure and behavior of gases.
Enrichment: Use an engineering design process and online simulations or lab investigations to design and model the results of controlled scientific investigations to produce mathematical evidence that confirms the gas-laws relationships. *
2026 Mississippi College- and Career-Readiness Standards for Science · Gas Laws
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students design a controlled test using a gas simulation or lab equipment. They change one variable, record measurements, and use a graph and calculations to test the relationship. They revise the test if a variable was not held steady.
What Mastery Looks Like
- Students can name what they changed, measured, and held fixed. Their data show a clear pattern, and they can check it by calculating PV, V/T, or P/T for each trial. They use kelvin for temperature calculations.
Common Misconceptions
- Students may expect pressure to rise when volume rises, even at a fixed temperature. They may use Celsius in gas-law ratios or let temperature change during a pressure-volume test. Some judge a graph by its shape without checking the numbers.
How to Assess It
- Exit ticket: A gas has a pressure of 100 kPa at 20 mL and 200 kPa at 10 mL. If temperature stayed fixed, calculate both PV products and state the relationship.
Lesson moves
Ways to Teach It
Attach a syringe to a pressure sensor, set four plunger volumes, and record pressure while keeping the gas at room temperature.
Ask students to write why heating the gas during a pressure-volume test makes the results hard to interpret.
Give pairs gas data cards to match with pressure-volume, volume-temperature, and pressure-temperature graphs, then have them check each match with calculations.
Have students predict the pressure of a sealed bike tire heated from 300 K to 330 K, starting at 300 kPa.
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Printable CHE.7.5 Worksheet
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