Challenge Crosswords Nature Hard — Set 9
🔬 Science Crossword #1
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Across
- 1. Uncharged particle in nucleus
- 6. A word related to science
- 8. Solid with ordered atomic structure
- 9. Slow-moving river of ice
Down
- 1. Center of an atom or cell
- 2. A word related to science
- 3. Smallest discrete unit of energy
- 4. Device for controlled nuclear reactions
- 5. Naturally occurring inorganic solid
- 7. Biological catalyst for reactions
Show answers
- 1 Across: Uncharged particle in nucleus (7)NEUTRON
- 6 Across: A word related to science (12)EXPERIMENTAL
- 8 Across: Solid with ordered atomic structure (7)CRYSTAL
- 9 Across: Slow-moving river of ice (7)GLACIER
- 1 Down: Center of an atom or cell (7)NUCLEUS
- 2 Down: A word related to science (10)BENEFICIAL
- 3 Down: Smallest discrete unit of energy (7)QUANTUM
- 4 Down: Device for controlled nuclear reactions (7)REACTOR
- 5 Down: Naturally occurring inorganic solid (7)MINERAL
- 7 Down: Biological catalyst for reactions (6)ENZYME
🔬 Science Crossword #2
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Across
- 3. A word related to science
- 6. One body blocking another in space
- 9. Diffusion of water through a membrane
- 10. Substance providing immunity
Down
- 1. A word related to science
- 2. Preserved remains of ancient life
- 4. Uncharged particle in nucleus
- 5. Device for controlled nuclear reactions
- 7. A word related to science
- 8. Wearing away of land by water or wind
Show answers
- 3 Across: A word related to science (9)PROBOSCIS
- 6 Across: One body blocking another in space (7)ECLIPSE
- 9 Across: Diffusion of water through a membrane (7)OSMOSIS
- 10 Across: Substance providing immunity (7)VACCINE
- 1 Down: A word related to science (12)COMPOUND EYE
- 2 Down: Preserved remains of ancient life (6)FOSSIL
- 4 Down: Uncharged particle in nucleus (7)NEUTRON
- 5 Down: Device for controlled nuclear reactions (7)REACTOR
- 7 Down: A word related to science (8)PARASITE
- 8 Down: Wearing away of land by water or wind (7)EROSION
🔬 Science Crossword #3
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Across
- 1. Wearing away of land by water or wind
- 3. Positively charged particle
- 4. Fourth state of matter
- 8. Center of an atom or cell
- 9. Large molecule essential for life
Down
- 1. A word related to science
- 2. A word related to science
- 5. A word related to science
- 6. Device for controlled nuclear reactions
- 7. Solid with ordered atomic structure
Show answers
- 1 Across: Wearing away of land by water or wind (7)EROSION
- 3 Across: Positively charged particle (6)PROTON
- 4 Across: Fourth state of matter (6)PLASMA
- 8 Across: Center of an atom or cell (7)NUCLEUS
- 9 Across: Large molecule essential for life (7)PROTEIN
- 1 Down: A word related to science (12)EXPERIMENTAL
- 2 Down: A word related to science (12)COMPOUND EYE
- 5 Down: A word related to science (8)MANDIBLE
- 6 Down: Device for controlled nuclear reactions (7)REACTOR
- 7 Down: Solid with ordered atomic structure (7)CRYSTAL
🔬 Science Crossword #4
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Across
- 2. Uncharged particle in nucleus
- 5. Mixture producing intense heat
- 6. Substance providing immunity
- 7. A word related to science
- 9. A word related to science
- 10. Device for controlled nuclear reactions
Down
- 1. Preserved remains of ancient life
- 3. Center of an atom or cell
- 4. A word related to science
- 8. Positively charged particle
Show answers
- 2 Across: Uncharged particle in nucleus (7)NEUTRON
- 5 Across: Mixture producing intense heat (7)THERMIT
- 6 Across: Substance providing immunity (7)VACCINE
- 7 Across: A word related to science (13)METAMORPHOSIS
- 9 Across: A word related to science (8)PARASITE
- 10 Across: Device for controlled nuclear reactions (7)REACTOR
- 1 Down: Preserved remains of ancient life (6)FOSSIL
- 3 Down: Center of an atom or cell (7)NUCLEUS
- 4 Down: A word related to science (9)PROBOSCIS
- 8 Down: Positively charged particle (6)PROTON
🔬 Science Crossword #5
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Across
- 1. Device for controlled nuclear reactions
- 4. Wearing away of land by water or wind
- 7. Naturally occurring inorganic solid
- 8. One body blocking another in space
- 9. A word related to science
- 10. A word related to science
Down
- 2. A word related to science
- 3. Biological catalyst for reactions
- 4. A word related to science
- 5. Center of an atom or cell
- 6. Fourth state of matter
Show answers
- 1 Across: Device for controlled nuclear reactions (7)REACTOR
- 4 Across: Wearing away of land by water or wind (7)EROSION
- 7 Across: Naturally occurring inorganic solid (7)MINERAL
- 8 Across: One body blocking another in space (7)ECLIPSE
- 9 Across: A word related to science (7)ABDOMEN
- 10 Across: A word related to science (9)NOCTURNAL
- 2 Down: A word related to science (12)COMPOUND EYE
- 3 Down: Biological catalyst for reactions (6)ENZYME
- 4 Down: A word related to science (12)EXPERIMENTAL
- 5 Down: Center of an atom or cell (7)NUCLEUS
- 6 Down: Fourth state of matter (6)PLASMA
Solver Notes
Ready to test your crossword expertise? Our challenge crossword puzzles feature advanced clues, complex grids, and tricky wordplay designed for experienced solvers seeking a real brain workout.
What are challenge crossword puzzles?
Challenge crossword puzzles are expert-level word games featuring advanced vocabulary, complex clue structures, and larger grids. They are designed for experienced crossword solvers who want to push their skills beyond standard difficulty levels.
How do I improve at solving challenge crosswords?
Build your skills gradually by starting with classic crosswords and working up to challenge level. Learn common crossword abbreviations, practice recognizing wordplay patterns, and expand your vocabulary across history, science, and general knowledge topics.
Are challenge crosswords suitable for all ages?
Challenge crosswords are best suited for adults and advanced students who already have strong crossword-solving experience. The difficult clues and specialized vocabulary assume familiarity with crossword conventions and a broad knowledge base.
How many challenge crossword puzzles are available?
Our challenge collection includes expert-level crossword puzzles covering general knowledge, history, science, and mixed topics. Each puzzle is crafted to provide a satisfying difficulty level that tests even the most seasoned crossword enthusiasts.
What is the difference between challenge and daily crosswords?
Daily crosswords offer moderate difficulty suitable for regular solving sessions, while challenge crosswords feature significantly harder clues and more obscure vocabulary. Challenge puzzles typically take longer to complete and reward deep knowledge across many subjects.