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8.84 Photosynthesis Matter and Energy Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 8 Science worksheet provides structured practice on 8.84 Photosynthesis Matter and Energy. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Photosynthesis: Matter and Energy - Which explanation best how plants use light energy to convert carbon dioxide and water into sugars and oxygen, tracing matter inputs/outputs? (NGSS MS‑LS1‑6; CCC: Energy/Matter; TEKS §112.28 Grade 8; FL NGSSS; VA SOL; MA STE)

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Grade 8

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 8.84 Photosynthesis Matter and Energy skill assessments:

Problem 1Difficulty: Mastery

A student claims: “Because glucose contains oxygen, plants must take in O2 gas to make glucose.”

Which explanation best corrects the claim?

AO2 gas is the only source of oxygen atoms in any molecule.

BO2 gas becomes carbon atoms in glucose.

CO2 gas is needed only at night to make glucose.

DThe oxygen in glucose can come from CO2 and water; O2 gas is mostly a product, not a required reactant for building glucose.

Solution & Explanation:Remember: photosynthesis uses carbon dioxide (CO2) and water (H2O) as matter inputs and light as an energy input to make sugars (like glucose) and release oxygen (O2). So the best answer is: The oxygen in glucose can come from CO2 and water; O2 gas is mostly a product, not a required reactant for building glucose.. Pick the option that correctly identifies the reactants/products or traces where the atoms go (CO2 supplies carbon; water supplies hydrogen and the oxygen released as O2).

Problem 2Difficulty: Mastery

A plant has enough light and CO2, but a herbicide blocks chlorophyll production in new leaves. Over time, photosynthesis decreases mostly in those new leaves. "

Which explanation best traces the role of chlorophyll?,A. Chlorophyll provides carbon atoms that become glucose. | B. Chlorophyll is the gas that enters through stomata. | C. Chlorophyll is produced as waste and must be removed to photosynthesize. | D. Chlorophyll is needed to absorb light energy that initiates reactions leading to sugar production; without it

Solution & Explanation:less energy is available to build sugars from CO2.,YES,model,Create a clean Grade 8 photosynthesis process model based on the row context. Show inputs

Problem 3Difficulty: Mastery

A student is given four statements and must pick the best explanation of photosynthesis: A) Plants use light energy to rearrange CO2 and H2O into glucose, releasing O2. B) Plants turn O2 and glucose into CO2 and H2O using light. C) Plants convert minerals into glucose and release CO2. D) Plants create new atoms from light energy. Which is best?

Select the best explanation.

APlants use light energy to rearrange CO2 and H2O into glucose, releasing O2.

BPlants turn O2 and glucose into CO2 and H2O using light.

CPlants convert minerals into glucose and release CO2.

DPlants create new atoms from light energy.

Solution & Explanation:Remember: photosynthesis uses carbon dioxide (CO2) and water (H2O) as matter inputs and light as an energy input to make sugars (like glucose) and release oxygen (O2). So the best answer is: Plants use light energy to rearrange CO2 and H2O into glucose, releasing O2.. Pick the option that correctly identifies the reactants/products or traces where the atoms go (CO2 supplies carbon; water supplies hydrogen and the oxygen released as O2).

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 8 Science students. It aligns with educational standard SCI.8.84 (Trace how light energy and matter are used to make sugars in photosynthesis.).