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