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