Classic Crosswords Classic Nature Hard — Set 2
🔬 Science Crossword #1
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Across
- 1. Smallest discrete unit of energy
- 3. Positively charged particle
- 5. Naturally occurring inorganic solid
- 7. A word related to science
- 8. Mixture producing intense heat
- 9. Diffusion of water through a membrane
- 10. Fourth state of matter
Down
- 2. A word related to science
- 4. Substance providing immunity
- 6. Biological catalyst for reactions
Show answers
- 1 Across: Smallest discrete unit of energy (7)QUANTUM
- 3 Across: Positively charged particle (6)PROTON
- 5 Across: Naturally occurring inorganic solid (7)MINERAL
- 7 Across: A word related to science (9)NOCTURNAL
- 8 Across: Mixture producing intense heat (7)THERMIT
- 9 Across: Diffusion of water through a membrane (7)OSMOSIS
- 10 Across: Fourth state of matter (6)PLASMA
- 2 Down: A word related to science (13)METAMORPHOSIS
- 4 Down: Substance providing immunity (7)VACCINE
- 6 Down: Biological catalyst for reactions (6)ENZYME
🔬 Science Crossword #2
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Across
- 4. Device for controlled nuclear reactions
- 5. Positively charged particle
- 9. Slow-moving river of ice
- 10. A word related to science
- 11. Diffusion of water through a membrane
Down
- 1. Solid with ordered atomic structure
- 2. A word related to science
- 3. Preserved remains of ancient life
- 6. A word related to science
- 7. One body blocking another in space
- 8. A word related to science
Show answers
- 4 Across: Device for controlled nuclear reactions (7)REACTOR
- 5 Across: Positively charged particle (6)PROTON
- 9 Across: Slow-moving river of ice (7)GLACIER
- 10 Across: A word related to science (10)BENEFICIAL
- 11 Across: Diffusion of water through a membrane (7)OSMOSIS
- 1 Down: Solid with ordered atomic structure (7)CRYSTAL
- 2 Down: A word related to science (8)MANDIBLE
- 3 Down: Preserved remains of ancient life (6)FOSSIL
- 6 Down: A word related to science (9)NOCTURNAL
- 7 Down: One body blocking another in space (7)ECLIPSE
- 8 Down: A word related to science (9)PROBOSCIS
🔬 Science Crossword #3
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Across
- 5. One body blocking another in space
- 9. Naturally occurring inorganic solid
- 10. A word related to science
- 11. Pure substance on periodic table
Down
- 1. Slow-moving river of ice
- 2. Mixture producing intense heat
- 3. Preserved remains of ancient life
- 4. A word related to science
- 6. A word related to science
- 7. Large molecule essential for life
- 8. Group of similar living organisms
Show answers
- 5 Across: One body blocking another in space (7)ECLIPSE
- 9 Across: Naturally occurring inorganic solid (7)MINERAL
- 10 Across: A word related to science (10)BENEFICIAL
- 11 Across: Pure substance on periodic table (7)ELEMENT
- 1 Down: Slow-moving river of ice (7)GLACIER
- 2 Down: Mixture producing intense heat (7)THERMIT
- 3 Down: Preserved remains of ancient life (6)FOSSIL
- 4 Down: A word related to science (8)MANDIBLE
- 6 Down: A word related to science (4)MOLT
- 7 Down: Large molecule essential for life (7)PROTEIN
- 8 Down: Group of similar living organisms (7)SPECIES
🔬 Science Crossword #4
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Across
- 4. Wearing away of land by water or wind
- 5. Fourth state of matter
- 6. Uncharged particle in nucleus
- 7. Preserved remains of ancient life
- 9. Substance providing immunity
- 10. Large molecule essential for life
Down
- 1. Center of an atom or cell
- 2. Naturally occurring inorganic solid
- 3. Device for controlled nuclear reactions
- 8. Group of similar living organisms
Show answers
- 4 Across: Wearing away of land by water or wind (7)EROSION
- 5 Across: Fourth state of matter (6)PLASMA
- 6 Across: Uncharged particle in nucleus (7)NEUTRON
- 7 Across: Preserved remains of ancient life (6)FOSSIL
- 9 Across: Substance providing immunity (7)VACCINE
- 10 Across: Large molecule essential for life (7)PROTEIN
- 1 Down: Center of an atom or cell (7)NUCLEUS
- 2 Down: Naturally occurring inorganic solid (7)MINERAL
- 3 Down: Device for controlled nuclear reactions (7)REACTOR
- 8 Down: Group of similar living organisms (7)SPECIES
🔬 Science Crossword #5
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Across
- 3. Uncharged particle in nucleus
- 5. Mixture producing intense heat
- 8. A word related to science
- 10. Biological catalyst for reactions
- 11. Wearing away of land by water or wind
Down
- 1. A word related to science
- 2. A word related to science
- 4. Diffusion of water through a membrane
- 6. Preserved remains of ancient life
- 7. A word related to science
- 9. Large molecule essential for life
Show answers
- 3 Across: Uncharged particle in nucleus (7)NEUTRON
- 5 Across: Mixture producing intense heat (7)THERMIT
- 8 Across: A word related to science (13)METAMORPHOSIS
- 10 Across: Biological catalyst for reactions (6)ENZYME
- 11 Across: Wearing away of land by water or wind (7)EROSION
- 1 Down: A word related to science (8)MANDIBLE
- 2 Down: A word related to science (9)NOCTURNAL
- 4 Down: Diffusion of water through a membrane (7)OSMOSIS
- 6 Down: Preserved remains of ancient life (6)FOSSIL
- 7 Down: A word related to science (4)MOLT
- 9 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.
What are classic crossword puzzles?
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.
How do I solve a classic crossword puzzle?
Start with the clues you know for certain and fill in those answers first. Use the crossing letters to help you figure out harder clues. Work through the across and down clues systematically, and don't be afraid to use a pencil so you can erase.
Who are classic crosswords best suited for?
Classic crossword puzzles are ideal for adults and older students who enjoy vocabulary challenges and general knowledge trivia. They work well for solo relaxation, classroom activities, or group puzzle-solving sessions.
How many classic crossword puzzles are available?
Our library includes dozens of classic crossword puzzles spanning topics like general knowledge, geography, history, and sports. New puzzles are added regularly so you always have fresh challenges to print and solve.
What is the difference between classic and quick crosswords?
Classic crossword puzzles use larger grids with more complex clues and require broader vocabulary knowledge. Quick crosswords feature smaller grids and simpler clues, making them faster to complete and more accessible for beginners.