Puzzle Detail
Classic Crosswords Classic Nature Expert — Set 7
🔬 Science Crossword #1
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Across
- 1. Biological catalyst for reactions
- 4. Group of similar living organisms
- 5. Device for controlled nuclear reactions
- 9. One body blocking another in space
- 10. Mixture producing intense heat
- 11. Wearing away of land by water or wind
Down
- 2. Center of an atom or cell
- 3. Slow-moving river of ice
- 6. Diffusion of water through a membrane
- 7. Naturally occurring inorganic solid
- 8. Pure substance on periodic table
Show answers
- 1 Across: Biological catalyst for reactions (6)ENZYME
- 4 Across: Group of similar living organisms (7)SPECIES
- 5 Across: Device for controlled nuclear reactions (7)REACTOR
- 9 Across: One body blocking another in space (7)ECLIPSE
- 10 Across: Mixture producing intense heat (7)THERMIT
- 11 Across: Wearing away of land by water or wind (7)EROSION
- 2 Down: Center of an atom or cell (7)NUCLEUS
- 3 Down: Slow-moving river of ice (7)GLACIER
- 6 Down: Diffusion of water through a membrane (7)OSMOSIS
- 7 Down: Naturally occurring inorganic solid (7)MINERAL
- 8 Down: Pure substance on periodic table (7)ELEMENT
🔬 Science Crossword #2
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Across
- 2. Large molecule essential for life
- 4. Fourth state of matter
- 8. Wearing away of land by water or wind
- 9. Diffusion of water through a membrane
- 10. Positively charged particle
- 11. Slow-moving river of ice
Down
- 1. Group of similar living organisms
- 3. Center of an atom or cell
- 5. Substance providing immunity
- 6. Solid with ordered atomic structure
- 7. Preserved remains of ancient life
Show answers
- 2 Across: Large molecule essential for life (7)PROTEIN
- 4 Across: Fourth state of matter (6)PLASMA
- 8 Across: Wearing away of land by water or wind (7)EROSION
- 9 Across: Diffusion of water through a membrane (7)OSMOSIS
- 10 Across: Positively charged particle (6)PROTON
- 11 Across: Slow-moving river of ice (7)GLACIER
- 1 Down: Group of similar living organisms (7)SPECIES
- 3 Down: Center of an atom or cell (7)NUCLEUS
- 5 Down: Substance providing immunity (7)VACCINE
- 6 Down: Solid with ordered atomic structure (7)CRYSTAL
- 7 Down: Preserved remains of ancient life (6)FOSSIL
🔬 Science Crossword #3
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Across
- 4. Fourth state of matter
- 5. Biological catalyst for reactions
- 6. Large molecule essential for life
- 9. Solid with ordered atomic structure
- 10. Wearing away of land by water or wind
Down
- 1. Smallest discrete unit of energy
- 2. Group of similar living organisms
- 3. Uncharged particle in nucleus
- 7. Device for controlled nuclear reactions
- 8. Mixture producing intense heat
Show answers
- 4 Across: Fourth state of matter (6)PLASMA
- 5 Across: Biological catalyst for reactions (6)ENZYME
- 6 Across: Large molecule essential for life (7)PROTEIN
- 9 Across: Solid with ordered atomic structure (7)CRYSTAL
- 10 Across: Wearing away of land by water or wind (7)EROSION
- 1 Down: Smallest discrete unit of energy (7)QUANTUM
- 2 Down: Group of similar living organisms (7)SPECIES
- 3 Down: Uncharged particle in nucleus (7)NEUTRON
- 7 Down: Device for controlled nuclear reactions (7)REACTOR
- 8 Down: Mixture producing intense heat (7)THERMIT
🔬 Science Crossword #4
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Across
- 2. Center of an atom or cell
- 6. Smallest discrete unit of energy
- 8. Force attracting objects to Earth
- 9. Substance providing immunity
- 10. Naturally occurring inorganic solid
- 11. Device for controlled nuclear reactions
Down
- 1. Pure substance on periodic table
- 3. Uncharged particle in nucleus
- 4. Group of similar living organisms
- 5. Biological catalyst for reactions
- 7. Slow-moving river of ice
Show answers
- 2 Across: Center of an atom or cell (7)NUCLEUS
- 6 Across: Smallest discrete unit of energy (7)QUANTUM
- 8 Across: Force attracting objects to Earth (7)GRAVITY
- 9 Across: Substance providing immunity (7)VACCINE
- 10 Across: Naturally occurring inorganic solid (7)MINERAL
- 11 Across: Device for controlled nuclear reactions (7)REACTOR
- 1 Down: Pure substance on periodic table (7)ELEMENT
- 3 Down: Uncharged particle in nucleus (7)NEUTRON
- 4 Down: Group of similar living organisms (7)SPECIES
- 5 Down: Biological catalyst for reactions (6)ENZYME
- 7 Down: Slow-moving river of ice (7)GLACIER
🔬 Science Crossword #5
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Across
- 1. Pure substance on periodic table
- 5. Group of similar living organisms
- 6. Smallest discrete unit of energy
- 7. Positively charged particle
- 11. Biological catalyst for reactions
- 12. Solid with ordered atomic structure
- 13. Preserved remains of ancient life
Down
- 2. Naturally occurring inorganic solid
- 3. Wearing away of land by water or wind
- 4. Mixture producing intense heat
- 8. Diffusion of water through a membrane
- 9. Uncharged particle in nucleus
- 10. Large molecule essential for life
Show answers
- 1 Across: Pure substance on periodic table (7)ELEMENT
- 5 Across: Group of similar living organisms (7)SPECIES
- 6 Across: Smallest discrete unit of energy (7)QUANTUM
- 7 Across: Positively charged particle (6)PROTON
- 11 Across: Biological catalyst for reactions (6)ENZYME
- 12 Across: Solid with ordered atomic structure (7)CRYSTAL
- 13 Across: Preserved remains of ancient life (6)FOSSIL
- 2 Down: Naturally occurring inorganic solid (7)MINERAL
- 3 Down: Wearing away of land by water or wind (7)EROSION
- 4 Down: Mixture producing intense heat (7)THERMIT
- 8 Down: Diffusion of water through a membrane (7)OSMOSIS
- 9 Down: Uncharged particle in nucleus (7)NEUTRON
- 10 Down: Large molecule essential for life (7)PROTEIN
Solver Notes
Enjoy our collection of classic crossword puzzles featuring traditional grid layouts and a wide range of topics. Each puzzle is free to download, print, and solve at your own pace.
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Classic crossword puzzles use a traditional symmetric grid where solvers fill in words based on numbered clues. Each puzzle features interlocking horizontal and vertical answers that share common letters, creating an engaging word challenge.
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