Mississippi Science BIO.2.5

ScienceGrades 9–12Biology

The Standard

BIO.2
Students will explain that cells transform energy through the processes of photosynthesis and cellular respiration to drive cellular functions.
Enrichment: Investigate variables (e.g., nutrient availability, temperature) that affect anaerobic respiration and current real-world applications of fermentation.

2026 Mississippi College- and Career-Readiness Standards for Science · Energy Transfer

Teacher's field guide

What This Standard Means

What Students Need to Do

Students change one factor, such as sugar amount or temperature, in a yeast fermentation setup. They measure gas production, compare results, and connect fermentation to uses such as bread making.

What Mastery Looks Like

A student keeps yeast amount, water volume, and time the same while changing only sugar amount. They use balloon size as evidence of gas production and explain how yeast makes bread rise.

Common Misconceptions

Students may think yeast needs oxygen to ferment. They may assume hotter water always produces more gas, even when heat kills the yeast. Some mistake an inflated balloon for proof that more yeast grew.

How to Assess It

Exit ticket: Identical yeast bottles differ only in sugar; their balloons measure 12 cm and 3 cm around after 20 minutes. Name the changed variable, the measurement, and a conclusion.

Lesson moves

Ways to Teach It

  1. Give pairs two bottles with equal yeast and water, add sugar to one, cover with balloons, and compare balloon size after 20 minutes.

  2. Ask students to explain why yeast makes bread dough rise and predict what happens if the mixing water is too hot.

  3. Hand out four bottle setups with sugar amounts and balloon measurements; students identify the changed variable, measured result, and fairest comparison.

  4. Bring a bread recipe and yogurt label; have students identify how microbes produce carbon dioxide in bread and acid in yogurt.

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Printable BIO.2.5 Worksheet

Preview of the BIO.2.5 printable worksheet

A ready-to-print activity worksheet aligned to BIO.2.5, with an answer key for the teacher on its own page. No account needed.

PDF, US Letter, prints cleanly in black and white.

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