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