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