Mississippi Science CHE.1.1

ScienceGrades 9–12Chemistry

The Standard

CHE.1: Students will use mathematical and computational analysis to evaluate problems.

Use dimensional analysis (factor/label) and significant figures to convert units and solve problems.

2026 Mississippi College- and Career-Readiness Standards for Science · Mathematical and Computational Analysis

Teacher's field guide

What Students Need to Do: Students choose conversion factors that cancel the unwanted units. They calculate the new value and report it with the right number of significant figures.
What Mastery Looks Like: Given 25.0 mL, a student writes 25.0 mL × (1 L / 1000 mL) = 0.0250 L. They explain why the answer keeps three significant figures.
Common Misconceptions: Students flip conversion factors and get units that do not cancel. They may count leading zeros as significant, drop a measured trailing zero, or round too early.
How to Assess It: Exit ticket: Convert 0.0750 L to mL using 1000 mL = 1 L. Show the setup, cancel units, and explain the number of significant figures in your answer.

Lesson moves

Measure 25.0 mL of water in a graduated cylinder, then arrange unit cards to convert it to 0.0250 L.
Put 0.0250 L and 0.025 L on the board; ask which preserves the precision of a 25.0 mL measurement and why.
Pairs race to convert 3.20 cm to mm and 0.0750 L to mL; points require canceled units and correct precision.
Hand out a 355 mL drink label and ask students to convert the volume to liters for a recycling log.

Free download

A ready-to-print activity worksheet aligned to CHE.1.1, with an answer key for the teacher on its own page. No account needed.

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