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