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Photosynthesis Jeopardy

How plants turn light into food, reviewed as a buzzer game. Free for science classes to copy, with the whole photosynthesis unit in six categories.

6 categories · 30 clues · Final Jeopardy · everyone buzzes in from their phone

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Every clue on this board

This page is public, so anyone can read the answers — copy the board and swap a few clues before game day.

The Chemical Equation

  1. $200

    Along with sunlight, this gas, absorbed from the air through the leaves, is a key raw material for photosynthesis.

    What is carbon dioxide?

  2. $400

    This liquid, absorbed by the roots and carried up through the plant, is the other key raw material for photosynthesis.

    What is water?

  3. $600

    This sugar, produced during photosynthesis, stores chemical energy that the plant can use later.

    What is glucose?

  4. $800

    This gas is released as a byproduct of photosynthesis and is essential for animals to breathe.

    What is oxygen?

  5. $1,000

    This term describes reactions, like photosynthesis, that absorb more energy from their surroundings than they release.

    What is an endothermic reaction?

Inside the Chloroplast

  1. $200

    This green pigment, found inside chloroplasts, absorbs sunlight to power photosynthesis.

    What is chlorophyll?

  2. $400

    These flattened, coin-like sacs inside a chloroplast, stacked like pancakes, hold chlorophyll and capture light.

    What are thylakoids?

  3. $600

    This fluid-filled space surrounding the stacks of thylakoids is where sugar-building reactions take place in a chloroplast.

    What is the stroma?

  4. $800

    This is the general term for a stack of thylakoids inside a chloroplast.

    What is a granum?

  5. $1,000

    This set of light-independent reactions uses carbon dioxide and stored energy to build sugar in the stroma.

    What is the Calvin cycle?

Leaves and Stomata

  1. $200

    This flat, usually green part of a plant is the primary site where photosynthesis takes place.

    What is a leaf?

  2. $400

    This waxy, protective layer coats the surface of a leaf and helps reduce water loss.

    What is the cuticle?

  3. $600

    This tissue, made of tightly packed cells near the top of a leaf, holds most of the leaf's chloroplasts and does most of its photosynthesizing.

    What is the palisade layer?

  4. $800

    These tiny veins running through a leaf carry water in and carry sugar out to the rest of the plant.

    What are veins?

  5. $1,000

    These paired cells surround each tiny leaf pore and change shape to open or close it.

    What are guard cells?

Light and Pigments

  1. $200

    This form of energy, captured by chlorophyll, powers the reactions of photosynthesis.

    What is light energy?

  2. $400

    Chlorophyll reflects this color of visible light rather than absorbing it, which is why most leaves look this color.

    What is green?

  3. $600

    This class of yellow and orange pigments, also found in chloroplasts, helps capture light energy and gives carrots and autumn leaves their color.

    What are carotenoids?

  4. $800

    These clusters of chlorophyll and other pigments inside the thylakoid membrane capture light energy and kick off the reactions of photosynthesis.

    What are photosystems?

  5. $1,000

    This diagram plots how effectively each wavelength of light drives photosynthesis, showing chlorophyll works best with red and blue light.

    What is an absorption spectrum?

The Cellular Respiration Connection

  1. $200

    This process, which happens mainly in the mitochondria, releases energy stored in sugar and is essentially the reverse of photosynthesis.

    What is cellular respiration?

  2. $400

    This energy-carrying molecule is produced by cellular respiration and powers most of a cell's activities.

    What is ATP?

  3. $600

    This organelle carries out cellular respiration, just as the chloroplast carries out photosynthesis.

    What is the mitochondrion?

  4. $800

    Unlike cellular respiration, which runs around the clock, photosynthesis only happens during this condition, when the sun is out.

    What is daylight?

  5. $1,000

    On a global scale, this cycle describes how carbon moves between the atmosphere, living things, and the ocean, driven largely by photosynthesis and respiration.

    What is the carbon cycle?

Plants in Ecosystems

  1. $200

    In a food chain, plants and other organisms that make their own food using photosynthesis are called this.

    What are producers?

  2. $400

    This term describes an organism, like an animal, that cannot make its own food and must eat other organisms for energy.

    What is a consumer?

  3. $600

    This large, densely treed biome, home to more than half of Earth's land species, produces roughly one fifth of the planet's oxygen through photosynthesis.

    What is the rainforest?

  4. $800

    These microscopic, floating algae and bacteria in the ocean carry out a large share of the planet's total photosynthesis.

    What is phytoplankton?

  5. $1,000

    This term describes the total amount of new plant matter, such as wood, leaves, and roots, produced by photosynthesis in an ecosystem over a given time.

    What is primary productivity?

Final Jeopardy — Tiny Doors

Carbon dioxide enters a leaf and water vapor escapes through these tiny pores, each opened and closed by a pair of guard cells.

What are stomata?

How to run this board

Six angles on one equation: this board reviews what goes into photosynthesis and what comes out, where in the cell it happens, how a leaf is built for the job, and how respiration runs the process in reverse.

The Cellular Respiration Connection category is the one to watch - students who can mirror the two equations have genuinely understood the unit, and students who cannot will reveal it here.

Photosynthesis units are short, so this board also works as a station in a review circuit: two teams, ten minutes, highest score moves on.

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