Science Crossword Puzzles: Free Printable and Online

Explore the fundamental principles and latest discoveries across physics, chemistry, biology, and astronomy. This topic covers scientific methods and breakthroughs.

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arachnid

Hard · 15×15 · 23 words
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  1. 4. Hardened dorsal shield covering the cephalothorax
  2. 5. Shedding one's hardened overcoat to permit expansion
  3. 7. Nursery parcel guarded in a spherical sac
  4. 8. Distal leg tip equipped with microscopic climbing claws
  5. 10. Polysaccharide armor forming the lightweight skeleton
  6. 14. Arachnid jaw mechanism designed to crush or pierce
  7. 16. Tail extremity that packs a toxic punch
  8. 18. Camouflaged subterranean door lined with soil and thread
  9. 19. Octet of ocular beads watching for vibration
  10. 20. Parasitic clockwork crawler spreading Lyme
  11. 21. Hourglass wearer with a reputation for lethal widowhood
  12. 22. Geometric suspended snare engineered of protein
  13. 23. Pertaining to the tail end that carries a sting

Down

  1. 1. Father figure absent after a cannibalistic mating encounter
  2. 2. The metamorphic act of crawling out of one's skin
  3. 3. Glands located near the leg base for liquid waste
  4. 6. Sydney resident lurking in ground silk tubes with deadly bite
  5. 9. Abdominal organ that prints liquid threads into open air
  6. 11. Daddylonglegs with no venom nor separate waistline
  7. 12. Glows neon under ultraviolet illumination with claws aloft
  8. 13. Scytodes missile that glues prey from a distance
  9. 15. Hollow syringe used before the digest begins
  10. 17. Silken tote bag carried under the sternum

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Ecologia

Easy · 5×5 · 5 words
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Across

  1. 1. A low woody plant with several stems
  2. 3. The natural movement of air
  3. 5. The green part of a plant that captures light

Down

  1. 2. The primary source of energy for life on Earth
  2. 4. Frozen water found at the poles

Human Body

Medium · 11×11 · 16 words
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  1. 1. Joint between humerus and forearm
  2. 4. Cage component guarding the lungs
  3. 5. Spongy organ filled with alveoli
  4. 6. Auditory flap housing the cochlea
  5. 8. Limb ending with five digits
  6. 9. Internal scaffolding of 206 bones
  7. 11. Orb enabling visual perception
  8. 12. Muscular pump with four chambers
  9. 13. Front side of the lower leg

Down

  1. 2. Tough band strapping bone to bone
  2. 3. Heptatic powerhouse detoxifying blood
  3. 5. Tactile boundary of the mouth
  4. 7. High-pressure vessel exiting the heart
  5. 8. Joint surrounded by the malleoli
  6. 9. Lymphatic filter behind the stomach
  7. 10. Vessel heading back to the heart

Science and Technology

Medium · 11×11 · 13 words
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  1. 1. Set of computer instructions behind software
  2. 6. Man-made relay stationed in orbit around the Earth
  3. 8. Semiconductor device used to amplify or switch electrical signals
  4. 12. Coherent beam of light amplified by stimulated emission
  5. 13. Hereditary unit found along a DNA strand

Down

  1. 2. Raw facts processed into useful information
  2. 3. Negatively charged subatomic particle orbiting an atomic nucleus
  3. 4. Laboratory instrument revealing things too tiny for the naked eye
  4. 5. Fundamental functional unit of living organisms
  5. 7. Detection system using reflected radio waves
  6. 9. Centralized machine delivering web resources on demand
  7. 10. Pertaining to sound or the speed of sound
  8. 11. Eight-bit unit that holds a single keystroke

Nutrition & Diet

Hard · 15×15 · 20 words
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  1. 3. Acid build-up that makes up a bodybuilder's building blocks
  2. 5. Medical state of excess storage that is a growing global issue
  3. 7. Waxy substance that can be good, bad, or downright ugly
  4. 13. The rate at which your body can actually use the nutrients you eat
  5. 17. Food component with medicinal benefits that sounds pharmaceutical
  6. 19. Cellular bodyguard fighting off free radical damage
  7. 20. Bean identity crisis that masquerades as milk, curd, or sauce

Down

  1. 1. Low-carb path where sugar is the ultimate enemy
  2. 2. Dietary thread that never gets digested but cleans up anyway
  3. 4. Large-scale nutrient tracker's shorthand
  4. 6. Relating to the regimen of what one consumes daily
  5. 8. Chemistry process that turns liquid oils into solid artery cloggers
  6. 9. Energy providers often exiled by those on a strict countdown
  7. 10. Acid essential for cell division that sounds like a playful romp
  8. 11. Trendy green that is tough to chew on in the stock market
  9. 12. Sprouting pet seed that packs a powerful omega-3 punch
  10. 14. Greasy molecule that hates mixing with water
  11. 15. One who avoids anything with a face or a mother
  12. 16. Ancient way of eating that makes modern stoves feel prehistoric
  13. 18. Stable food that lowers cholesterol

general science knowlege

Medium · 15×15 · 23 words
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  1. 1. The fundamental structural and functional unit of all living organisms
  2. 3. The molecule that carries genetic instructions in all living things
  3. 6. A threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes
  4. 12. A submicroscopic infectious agent that replicates only inside the living cells of an organism
  5. 13. Molten rock that breaks through the Earth's surface
  6. 15. The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
  7. 18. A unit of heredity that is transferred from a parent to offspring
  8. 20. A nucleic acid present in all living cells that acts as a messenger carrying instructions from DNA
  9. 21. A triatomic molecule consisting of three oxygen atoms
  10. 22. A substance that can accept hydrogen ions or more generally, donate electron pairs
  11. 23. A pure substance consisting only of atoms that all have the same number of protons

Down

  1. 2. A device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation
  2. 4. A chemical substance that neutralizes alkalis and turns litmus paper red
  3. 5. A natural phenomenon by which all things with mass or energy are brought toward one another
  4. 7. An alteration in the nucleic acid sequence of the genome of an organism
  5. 8. An astronomical event that occurs when an astronomical object or spacecraft is temporarily obscured
  6. 9. A combustible black rock consisting mainly of carbonized plant matter
  7. 10. A result obtained by dividing one quantity by another
  8. 11. A solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originates in outer space and survives its passage through the atmosphere to reach the surface of a planet or moon
  9. 14. An optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses
  10. 16. A band of colors, as seen in a rainbow, produced by separation of the components of light
  11. 17. The liquid in which a solute is dissolved to form a solution
  12. 19. A system for detecting the presence, direction, or speed of aircraft and other objects using radio waves

general science knowlege

Medium · 11×11 · 15 words
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  1. 1. The fundamental structural and functional unit of all living organisms
  2. 6. The quantitative property that must be transferred to a body or physical system to perform work
  3. 7. A part of the body that has a specific vital function, such as the heart or liver
  4. 10. A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change
  5. 12. An atom or molecule with a net electric charge due to the loss or gain of electrons
  6. 13. A chemical substance that neutralizes alkalis and turns litmus paper red
  7. 14. The self-replicating material present in nearly all living organisms as the main constituent of chromosomes
  8. 15. The alteration of the nucleotide sequence of the genome of an organism

Down

  1. 2. Hot molten or semifluid rock erupted from a volcano or fissure
  2. 3. A unit of heredity which is transferred from a parent to offspring
  3. 4. The basic unit of a chemical element
  4. 5. The resistance that one surface or object encounters when moving over another
  5. 8. The natural phenomenon by which all things with mass or energy are brought toward one another
  6. 9. A pure substance consisting only of atoms that all have the same number of protons
  7. 11. A substance that can accept hydrogen ions or more generally, donate electron pairs

ACROSS — 20 1. Property of a solution that depends on the number of solute particles. 2. Law relating vapor pressure to mole fraction. 3. Substance dissolved in a solvent. 4. Substance that dissolves

Medium · 15×15 · 24 words
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  1. 6. Common name for sodium chloride, used to melt ice on winter roads
  2. 8. To incorporate a solid into a liquid so as to form a solution
  3. 9. Solid phase of water
  4. 11. Amount of three-dimensional space enclosed by a closed surface
  5. 13. Charged particles that form when electrolytes dissolve
  6. 14. Having a lower osmotic pressure than a surrounding fluid
  7. 17. English chemist whose law relates gas solubility to partial pressure
  8. 22. Property of a solution that depends only on the number of solute particles, not their identity
  9. 23. The most common polar solvent on Earth
  10. 24. The basic structural unit of all organisms, affected by external osmotic pressure

Down

  1. 1. Substance that accepts hydrogen ions in solution
  2. 2. Substance that is dissolved in a solvent to form a mixture
  3. 3. Having the same osmotic pressure as some other solution
  4. 4. Type of solution that strictly obeys Raoult's law at all concentrations
  5. 5. Thin selective barrier that allows certain molecules to pass through but blocks others
  6. 7. Statement of relation or sequence in natural phenomena that always holds true under given conditions
  7. 10. State of matter with no definite volume or shape
  8. 12. Concentration measured in moles of solute per liter of solution
  9. 15. Physically distinctive form of matter, such as solid, liquid, or gas
  10. 16. Type of osmosis used in water purification systems
  11. 18. French chemist who formulated the law relating vapor pressure to mole fraction
  12. 19. Substance that donates hydrogen ions in solution
  13. 20. Relation between two amounts showing the number of times one value contains or is contained within the other
  14. 21. Having the same quantity, value, or measure

ACROSS — 20 1. Property of a solution that depends on the number of solute particles. 2. Law relating vapor pressure to mole fraction. 3. Substance dissolved in a solvent. 4. Substance that dissolves

Medium · 11×11 · 15 words
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  1. 1. State of matter of most solvents used in colligative property experiments
  2. 6. The SI unit for amount of substance, representing Avogadro's number of particles
  3. 8. The substance that is dissolved in a solvent to form a solution
  4. 9. A thin barrier that allows only certain particles to pass through during osmosis
  5. 11. The relationship between solute and solvent quantities, such as mole fraction
  6. 13. Type of solution that obeys Raoult's law perfectly across all concentrations
  7. 14. To combine solute and solvent to form a homogeneous system
  8. 15. An atom or molecule with a net electric charge due to the loss or gain of electrons

Down

  1. 2. Solid phase of water that forms at a lower temperature when solute is added
  2. 3. To make a solution less concentrated by adding more solvent
  3. 4. To transition from a liquid to a solid state
  4. 5. The substance, typically liquid, that dissolves another substance
  5. 7. Concentration measured as moles of solute per kilogram of solvent
  6. 10. The gaseous state of a substance that is normally a liquid or solid at room temperature
  7. 12. A substance that releases hydrogen ions in water, increasing solute particle count

Biology and Medicine

Easy · 11×11 · 14 words
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  1. 3. The basic structural and functional unit of all living organisms
  2. 5. A substance used to stimulate the production of antibodies
  3. 6. A rigid organ that constitutes part of the skeleton
  4. 8. The internal organ in which the major part of digestion occurs
  5. 10. An abnormally high body temperature
  6. 11. A person receiving medical treatment
  7. 12. A fiber that transmits impulses of sensation to the brain

Down

  1. 1. The organ of soft nervous tissue contained in the skull
  2. 2. An optical instrument used for viewing very small objects
  3. 4. Either of the two breathing organs in the chest
  4. 6. Microscopic single-celled organisms that lack a distinct nucleus
  5. 7. The gas essential for respiration that we breathe in
  6. 8. The thin layer of tissue forming the natural outer covering of the body
  7. 9. A blood vessel that carries blood back to the heart
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Related Printable Crossword Topics

AnatomyAstronomyBiologyChemistryEcologyFamous InventionsFood ChainsGenetics & DNAHuman BodyMedicineNutrition & DietPeriodic Table

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