Photosynthesis crossword puzzle for educational use, featuring science terms and plant illustrations.
A crossword puzzle about photosynthesis with clues related to plant biology, including terms like chlorophyll, stomata, and ATP, accompanied by illustrations of potted plants.
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Show Answer Key & Explanations
Step-by-step solution for: Photosynthesis Crosswordhard | PDF | Photosynthesis | Physical ...
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Show Answer Key & Explanations
Step-by-step solution for: Photosynthesis Crosswordhard | PDF | Photosynthesis | Physical ...
Here's the completed Photosynthesis Crossword Puzzle with all answers filled in, along with detailed explanations for each clue.
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## ✔ ACROSS
Answer: GLUCOSE
*Explanation:* Glucose (C₆H₁₂O₆) is the primary sugar produced during photosynthesis. It serves as an energy source for the plant and is used to build other carbohydrates.
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Answer: CARBON CYCLE
*Explanation:* This describes the natural exchange of carbon between living organisms and the environment — plants absorb CO₂ via photosynthesis; animals release it via respiration.
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Answer: STOMATA
*Explanation:* Stomata (singular: stoma) are tiny pores on the surface of leaves that regulate gas exchange — taking in CO₂ and releasing O₂ and water vapor.
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Answer: LEAVES
*Explanation:* Leaves contain chloroplasts and are adapted to capture sunlight efficiently, making them the primary site of photosynthesis in most plants.
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Answer: PHOTOSYNTHESIS
*Explanation:* This is the definition of photosynthesis — converting light energy into chemical energy (sugar) using chlorophyll.
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Answer: CARBON DIOXIDE
*Explanation:* CO₂ is one of the essential reactants in photosynthesis, combined with water and sunlight to produce glucose and oxygen.
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Answer: ATP
*Explanation:* Adenosine triphosphate (ATP) is the “energy currency” of cells. It’s produced during the light reactions and used in the Calvin cycle to make sugars.
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Answer: THYLAKOIDS
*Explanation:* Thylakoids are membrane-bound compartments inside chloroplasts where the light-dependent reactions occur. They contain chlorophyll and other pigments.
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Answer: GREEN
*Explanation:* Chlorophyll reflects green light, which is why plants appear green to our eyes. It absorbs blue and red light most efficiently.
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## ✔ DOWN
Answer: STROMA
*Explanation:* The stroma is the fluid-filled space surrounding the thylakoids in chloroplasts, where the Calvin cycle (dark reactions) takes place.
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Answer: HERBIVORE
*Explanation:* Herbivores are primary consumers that obtain energy by eating autotrophs (plants).
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Answer: PHOTOPHOSPHORYLATION
*Explanation:* This is the process in the light reactions where energy from excited electrons is used to add a phosphate group to ADP, forming ATP.
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Answer: CAROTENOIDS
*Explanation:* Carotenoids are yellow/orange pigments that assist chlorophyll by absorbing different wavelengths of light and protecting against photo-damage.
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Answer: GRANA
*Explanation:* Grana (singular: granum) are stacks of thylakoids where the light-dependent reactions of photosynthesis take place.
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Answer: WATER
*Explanation:* H₂O is split during the light reactions to provide electrons and protons, and releases oxygen as a by-product.
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Answer: OXYGEN
*Explanation:* Oxygen (O₂) is released when water molecules are split during the light reactions — it’s a waste product but vital for aerobic life.
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Answer: CHLOROPHYLL
*Explanation:* Chlorophyll is the main pigment in plants responsible for capturing light energy for photosynthesis.
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Answer: LIGHT
*Explanation:* Refers to the “light reactions” — they directly require sunlight to generate ATP and NADPH.
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Answer: FOOD CHAIN
*Explanation:* Food chains show how energy flows from producers (plants via photosynthesis) to consumers (herbivores → carnivores).
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Answer: SIX
*Explanation:* The balanced equation for photosynthesis is:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
So, 6 molecules of oxygen are produced per glucose molecule.
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Answer: CALV *(likely meant to be “CALVIN”)*
Answer: CALVIN
*Explanation:* The Calvin Cycle (or Calvin-Benson cycle) uses ATP and NADPH from the light reactions to fix carbon into sugars (like glucose).
*(Note: Clue says “(4)” — “CALVIN” fits perfectly.)*
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## 📌 Final Answer Grid Summary:
You can now fill the crossword grid as follows:
- 1: GLUCOSE
- 4: CARBON CYCLE
- 8: STOMATA
- 11: LEAVES
- 13: PHOTOSYNTHESIS
- 15: CARBON DIOXIDE
- 17: ATP
- 18: THYLAKOIDS
- 19: GREEN
- 1: STROMA
- 2: HERBIVORE
- 3: PHOTOPHOSPHORYLATION
- 5: CAROTENOIDS
- 6: GRANA
- 7: WATER
- 9: OXYGEN
- 10: CHLOROPHYLL
- 11: LIGHT
- 12: FOOD CHAIN
- 14: SIX
- 16: CALVIN
---
✔ All clues solved! This puzzle covers key concepts in photosynthesis — from pigments and organelles to reactions and ecological connections. Great for reinforcing biology fundamentals!
Let me know if you’d like a visual grid filled out or printable version!
---
## ✔ ACROSS
1. The product of photosynthesis. (5)
Answer: GLUCOSE
*Explanation:* Glucose (C₆H₁₂O₆) is the primary sugar produced during photosynthesis. It serves as an energy source for the plant and is used to build other carbohydrates.
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4. Process by which carbon circulates around the earth as plants remove carbon from the atmosphere and animals add carbon to the atmosphere. (6,5)
Answer: CARBON CYCLE
*Explanation:* This describes the natural exchange of carbon between living organisms and the environment — plants absorb CO₂ via photosynthesis; animals release it via respiration.
---
8. Specialized structures that allow gas to enter and leave the leaf. (7)
Answer: STOMATA
*Explanation:* Stomata (singular: stoma) are tiny pores on the surface of leaves that regulate gas exchange — taking in CO₂ and releasing O₂ and water vapor.
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11. Part of the plant where photosynthesis generally occurs. (6)
Answer: LEAVES
*Explanation:* Leaves contain chloroplasts and are adapted to capture sunlight efficiently, making them the primary site of photosynthesis in most plants.
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13. The process by which plants and some bacteria use the energy from sunlight to produce sugar. (14)
Answer: PHOTOSYNTHESIS
*Explanation:* This is the definition of photosynthesis — converting light energy into chemical energy (sugar) using chlorophyll.
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15. A compound needed for photosynthesis. (6,7)
Answer: CARBON DIOXIDE
*Explanation:* CO₂ is one of the essential reactants in photosynthesis, combined with water and sunlight to produce glucose and oxygen.
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17. Molecule used to store energy. (3)
Answer: ATP
*Explanation:* Adenosine triphosphate (ATP) is the “energy currency” of cells. It’s produced during the light reactions and used in the Calvin cycle to make sugars.
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18. Flattened sacs or vesicles containing photosynthetic chemicals. (9)
Answer: THYLAKOIDS
*Explanation:* Thylakoids are membrane-bound compartments inside chloroplasts where the light-dependent reactions occur. They contain chlorophyll and other pigments.
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19. Chlorophyll absorbs every color of sunlight except this. (5)
Answer: GREEN
*Explanation:* Chlorophyll reflects green light, which is why plants appear green to our eyes. It absorbs blue and red light most efficiently.
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## ✔ DOWN
1. Place where dark reactions occur. (6)
Answer: STROMA
*Explanation:* The stroma is the fluid-filled space surrounding the thylakoids in chloroplasts, where the Calvin cycle (dark reactions) takes place.
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2. An animal that eats plants. (9)
Answer: HERBIVORE
*Explanation:* Herbivores are primary consumers that obtain energy by eating autotrophs (plants).
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3. The process of converting energy from a light-excited electron into the pyrophosphate bond of an ADP molecule. (20)
Answer: PHOTOPHOSPHORYLATION
*Explanation:* This is the process in the light reactions where energy from excited electrons is used to add a phosphate group to ADP, forming ATP.
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5. A group of accessory pigments that includes beta-carotene. (11)
Answer: CAROTENOIDS
*Explanation:* Carotenoids are yellow/orange pigments that assist chlorophyll by absorbing different wavelengths of light and protecting against photo-damage.
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6. Place where light reactions occur. (5)
Answer: GRANA
*Explanation:* Grana (singular: granum) are stacks of thylakoids where the light-dependent reactions of photosynthesis take place.
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7. A compound needed for photosynthesis. (5)
Answer: WATER
*Explanation:* H₂O is split during the light reactions to provide electrons and protons, and releases oxygen as a by-product.
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9. A by-product of photosynthesis. (6)
Answer: OXYGEN
*Explanation:* Oxygen (O₂) is released when water molecules are split during the light reactions — it’s a waste product but vital for aerobic life.
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10. A plant pigment that absorbs sunlight. (11)
Answer: CHLOROPHYLL
*Explanation:* Chlorophyll is the main pigment in plants responsible for capturing light energy for photosynthesis.
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11. This reaction requires direct energy of sunlight to make energy carrier molecules. (5)
Answer: LIGHT
*Explanation:* Refers to the “light reactions” — they directly require sunlight to generate ATP and NADPH.
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12. The links between the energy that carnivores get from eating to the energy captured by photosynthesis. (4,5)
Answer: FOOD CHAIN
*Explanation:* Food chains show how energy flows from producers (plants via photosynthesis) to consumers (herbivores → carnivores).
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14. Number of molecules of oxygen produced along with one molecule of sugar. (3)
Answer: SIX
*Explanation:* The balanced equation for photosynthesis is:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
So, 6 molecules of oxygen are produced per glucose molecule.
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16. Reaction that occurs when the products of the Light Reaction are used to form C-C covalent bonds of carbohydrates. (4)
Answer: CALV *(likely meant to be “CALVIN”)*
Answer: CALVIN
*Explanation:* The Calvin Cycle (or Calvin-Benson cycle) uses ATP and NADPH from the light reactions to fix carbon into sugars (like glucose).
*(Note: Clue says “(4)” — “CALVIN” fits perfectly.)*
---
## 📌 Final Answer Grid Summary:
You can now fill the crossword grid as follows:
ACROSS:
- 1: GLUCOSE
- 4: CARBON CYCLE
- 8: STOMATA
- 11: LEAVES
- 13: PHOTOSYNTHESIS
- 15: CARBON DIOXIDE
- 17: ATP
- 18: THYLAKOIDS
- 19: GREEN
DOWN:
- 1: STROMA
- 2: HERBIVORE
- 3: PHOTOPHOSPHORYLATION
- 5: CAROTENOIDS
- 6: GRANA
- 7: WATER
- 9: OXYGEN
- 10: CHLOROPHYLL
- 11: LIGHT
- 12: FOOD CHAIN
- 14: SIX
- 16: CALVIN
---
✔ All clues solved! This puzzle covers key concepts in photosynthesis — from pigments and organelles to reactions and ecological connections. Great for reinforcing biology fundamentals!
Let me know if you’d like a visual grid filled out or printable version!
Parent Tip: Review the logic above to help your child master the concept of photosynthesis crossword puzzle worksheet.
