Challenge Crosswords Nature Hard — Set 8
🔬 Science Crossword #1
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Across
- 2. Positively charged particle
- 3. One body blocking another in space
- 7. Mixture producing intense heat
- 8. Smallest discrete unit of energy
- 9. A word related to science
- 10. Solid with ordered atomic structure
Down
- 1. Pure substance on periodic table
- 2. A word related to science
- 4. A word related to science
- 5. A word related to science
- 6. Preserved remains of ancient life
Show answers
- 2 Across: Positively charged particle (6)PROTON
- 3 Across: One body blocking another in space (7)ECLIPSE
- 7 Across: Mixture producing intense heat (7)THERMIT
- 8 Across: Smallest discrete unit of energy (7)QUANTUM
- 9 Across: A word related to science (10)BENEFICIAL
- 10 Across: Solid with ordered atomic structure (7)CRYSTAL
- 1 Down: Pure substance on periodic table (7)ELEMENT
- 2 Down: A word related to science (8)PARASITE
- 4 Down: A word related to science (12)EXPERIMENTAL
- 5 Down: A word related to science (9)PROBOSCIS
- 6 Down: Preserved remains of ancient life (6)FOSSIL
🔬 Science Crossword #2
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Across
- 1. Biological catalyst for reactions
- 4. A word related to science
- 5. Fourth state of matter
- 7. Preserved remains of ancient life
- 9. A word related to science
- 10. A word related to science
Down
- 2. A word related to science
- 3. Slow-moving river of ice
- 4. Naturally occurring inorganic solid
- 6. Solid with ordered atomic structure
- 8. Positively charged particle
Show answers
- 1 Across: Biological catalyst for reactions (6)ENZYME
- 4 Across: A word related to science (6)MAGGOT
- 5 Across: Fourth state of matter (6)PLASMA
- 7 Across: Preserved remains of ancient life (6)FOSSIL
- 9 Across: A word related to science (9)NOCTURNAL
- 10 Across: A word related to science (10)BENEFICIAL
- 2 Down: A word related to science (13)METAMORPHOSIS
- 3 Down: Slow-moving river of ice (7)GLACIER
- 4 Down: Naturally occurring inorganic solid (7)MINERAL
- 6 Down: Solid with ordered atomic structure (7)CRYSTAL
- 8 Down: Positively charged particle (6)PROTON
🔬 Science Crossword #3
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Across
- 3. A word related to science
- 5. Pure substance on periodic table
- 9. Center of an atom or cell
- 10. A word related to science
- 11. Group of similar living organisms
Down
- 1. Preserved remains of ancient life
- 2. Solid with ordered atomic structure
- 4. One body blocking another in space
- 6. A word related to science
- 7. Uncharged particle in nucleus
- 8. Device for controlled nuclear reactions
Show answers
- 3 Across: A word related to science (9)PROBOSCIS
- 5 Across: Pure substance on periodic table (7)ELEMENT
- 9 Across: Center of an atom or cell (7)NUCLEUS
- 10 Across: A word related to science (8)PARASITE
- 11 Across: Group of similar living organisms (7)SPECIES
- 1 Down: Preserved remains of ancient life (6)FOSSIL
- 2 Down: Solid with ordered atomic structure (7)CRYSTAL
- 4 Down: One body blocking another in space (7)ECLIPSE
- 6 Down: A word related to science (8)MANDIBLE
- 7 Down: Uncharged particle in nucleus (7)NEUTRON
- 8 Down: Device for controlled nuclear reactions (7)REACTOR
🔬 Science Crossword #4
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Across
- 1. Naturally occurring inorganic solid
- 4. A word related to science
- 6. Positively charged particle
- 7. Wearing away of land by water or wind
- 9. A word related to science
- 10. Center of an atom or cell
Down
- 2. Uncharged particle in nucleus
- 3. Group of similar living organisms
- 5. Mixture producing intense heat
- 8. Diffusion of water through a membrane
Show answers
- 1 Across: Naturally occurring inorganic solid (7)MINERAL
- 4 Across: A word related to science (9)NOCTURNAL
- 6 Across: Positively charged particle (6)PROTON
- 7 Across: Wearing away of land by water or wind (7)EROSION
- 9 Across: A word related to science (13)METAMORPHOSIS
- 10 Across: Center of an atom or cell (7)NUCLEUS
- 2 Down: Uncharged particle in nucleus (7)NEUTRON
- 3 Down: Group of similar living organisms (7)SPECIES
- 5 Down: Mixture producing intense heat (7)THERMIT
- 8 Down: Diffusion of water through a membrane (7)OSMOSIS
🔬 Science Crossword #5
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Across
- 2. One body blocking another in space
- 3. A word related to science
- 6. Solid with ordered atomic structure
- 9. Center of an atom or cell
- 10. Biological catalyst for reactions
- 11. Uncharged particle in nucleus
- 12. Fourth state of matter
Down
- 1. A word related to science
- 4. A word related to science
- 5. Substance providing immunity
- 7. Device for controlled nuclear reactions
- 8. Smallest discrete unit of energy
Show answers
- 2 Across: One body blocking another in space (7)ECLIPSE
- 3 Across: A word related to science (10)BENEFICIAL
- 6 Across: Solid with ordered atomic structure (7)CRYSTAL
- 9 Across: Center of an atom or cell (7)NUCLEUS
- 10 Across: Biological catalyst for reactions (6)ENZYME
- 11 Across: Uncharged particle in nucleus (7)NEUTRON
- 12 Across: Fourth state of matter (6)PLASMA
- 1 Down: A word related to science (12)BENEFICIALLY
- 4 Down: A word related to science (9)NOCTURNAL
- 5 Down: Substance providing immunity (7)VACCINE
- 7 Down: Device for controlled nuclear reactions (7)REACTOR
- 8 Down: Smallest discrete unit of energy (7)QUANTUM
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.