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.

Print any science crossword below, download it as a PDF, or play it online. Free, and no signup is needed to play.

10 puzzles, click Print on any puzzle below

Science

Easy · 5×5 · 5 words
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Across

  1. 4. The vast area beyond the Earth atmosphere
  2. 5. A hard piece of the skeleton inside the body

Down

  1. 1. A state of matter that expands to fill its container
  2. 2. The molecule that carries genetic information
  3. 3. A unit of heredity passed from parent to child

Biology

Easy · 7×7 · 8 words
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Across

  1. 1. The small part of a plant that can grow into a new one
  2. 4. An organ used for breathing air
  3. 6. The organ used for seeing
  4. 7. A fiber that sends signals to the brain

Down

  1. 1. The outer layer of the body
  2. 2. The molecule that carries genetic information
  3. 3. The basic unit of all living things
  4. 5. A segment of DNA that determines a trait

Deep Space Discoveries

Medium · 11×11 · 14 words
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Across

  1. 1. The closest celestial body of its kind to Earth
  2. 2. Nebular formation, or what vaporizes daily on the exoplanet WASP-94A b
  3. 5. Hypothetical life form from beyond our solar system
  4. 6. Acronym for NASA's exoplanet-hunting satellite launched in 2018
  5. 9. Essential instrument for observing distant cosmic phenomena
  6. 10. High-energy electromagnetic radiation emitted by some quasars
  7. 11. Prefix for an exoplanet that is more massive than Earth but lighter than Neptune
  8. 12. European space agency behind the Euclid telescope
  9. 13. The stretching of light to longer wavelengths as galaxies move away from us

Down

  1. 1. Luminous plasma sphere that might host its own system
  2. 3. Cosmic powder that obscures our view of forming planetary systems
  3. 4. The entirety of space, time, and their contents
  4. 7. A world found orbiting a star other than our sun
  5. 8. A 'mini' version of this blue ice giant is a common type of exoplanet

Simple biology cells knowledge

Easy · 7×7 · 7 words
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Across

  1. 1. Any tiny part of a cell with a specific job
  2. 5. The scientific name for the cell control center
  3. 7. A small segment of DNA that determines a trait

Down

  1. 2. The simple sugar that cells use for fuel
  2. 3. The genetic material that carries instructions for life
  3. 4. A long cell that sends signals to the brain
  4. 6. Cells that form a protective layer over the body

Astronomy

Easy · 7×7 · 7 words
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Across

  1. 1. The most famous dwarf planet in our solar system
  2. 5. The blue gas giant that is farthest from the sun
  3. 6. A piece of glass used in a telescope to see far away

Down

  1. 1. A large round object that circles a star
  2. 2. The vast empty area beyond Earths atmosphere
  3. 3. The star at the center of our solar system
  4. 4. The hottest planet in our solar system

Astronomy

Easy · 7×7 · 7 words
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Across

  1. 2. The vast empty area beyond Earths atmosphere
  2. 4. The windy blue planet furthest from the sun
  3. 5. The space above the Earth where clouds and stars appear
  4. 6. The curved glass part of a telescope

Down

  1. 1. The only planet known to support life
  2. 3. The hottest planet in our solar system
  3. 4. The United States space agency

Biology

Easy · 7×7 · 9 words
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Across

  1. 1. The small part of a plant that can grow into a new one
  2. 4. An organ used for breathing air
  3. 7. The organ used for seeing
  4. 8. The main trunk of a plant that supports leaves

Down

  1. 1. The outer layer covering a human body
  2. 2. An oval object from which a baby animal hatches
  3. 3. The basic building block of all living things
  4. 5. A tiny living thing that can cause disease
  5. 6. The part of a plant where photosynthesis usually happens

The Five Senses

Medium · 15×15 · 15 words
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Across

  1. 1. Clear, curved outer layer that covers and protects the front of the eye
  2. 3. Relating to the eyes or the sense of vision
  3. 6. Light-sensitive layer at the back of the eye
  4. 7. Specialized cell that detects a specific type of stimulus
  5. 9. Black opening in the eye that lets light enter
  6. 10. Relating to the sense of taste
  7. 11. Rapid back-and-forth movement that produces sound
  8. 12. How high or low a sound seems to the ear
  9. 13. Relating to the senses or to physical feeling
  10. 14. Number of sound wave vibrations that occur each second

Down

  1. 2. Thin fiber that carries messages between the brain and the rest of the body
  2. 4. Spiral-shaped, fluid-filled part of the inner ear that helps you hear
  3. 5. Thin membrane that vibrates when sound waves strike it
  4. 8. Relating to the sense of smell
  5. 9. Brain's process of interpreting information gathered by the senses

The Five Senses

Easy · 11×11 · 14 words
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Across

  1. 1. Sense that lets your tongue detect flavors in food
  2. 6. Describes a sound that is very strong or noisy
  3. 8. How something feels, such as smooth, rough, or bumpy
  4. 10. Vibration that travels through the air and can be heard
  5. 12. Body part used for hearing sounds
  6. 13. Sense that lets you detect sound using your ears

Down

  1. 2. Muscular body part in your mouth used for tasting
  2. 3. Combination of taste and smell that you notice while eating
  3. 4. Another word for a smell, pleasant or unpleasant
  4. 5. Sense that lets you see using your eyes
  5. 7. Body part used for smelling
  6. 8. Sense that lets your skin feel pressure, texture, and temperature
  7. 9. Body part used for seeing
  8. 11. Body's largest organ, used to feel touch and temperature

Magnetism

Medium · 15×15 · 14 words
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Across

  1. 3. To cause a magnetic object to lose its magnetic properties
  2. 7. Describes magnetism that fades quickly once the magnetizing force is removed
  3. 10. Silvery metal that, like iron and cobalt, can be magnetized
  4. 11. Navigation tool that uses Earth's magnetic field to show direction
  5. 13. Force pushing two like magnetic poles apart

Down

  1. 1. Object surrounded by an invisible field that attracts iron and steel
  2. 2. Creating magnetism in an object without direct contact
  3. 3. Tiny region inside a magnetic material where atoms line up in the same direction
  4. 4. Relating to the magnetic field surrounding planet Earth
  5. 5. Mixture of two or more metals, sometimes used to make strong magnets
  6. 6. Describes a magnet that keeps its magnetic field without needing electricity
  7. 8. Region of magnetic or electric influence surrounding an object
  8. 9. Hard, silvery metal that is naturally magnetic, along with iron and nickel
  9. 12. Term for the total magnetic field passing through a given area

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Science Crossword FAQ

Is this Science crossword puzzle free?

Yes. Every Science crossword on this page is free. You can print it, download it as a PDF, or play it online without paying anything or creating an account.

Can I print the Science crossword?

Yes. Click Print on any puzzle for a print-ready page with the grid, the clues, and a name and date line, or use Download to save it as a PDF, PNG, or JPEG for photocopying. The PDF download includes a filled answer key on the last page for grading.

Can students play these crosswords online?

Yes. Every puzzle has a Play online link that opens in the browser on any device. No app install and no signup is needed to play, which makes it easy to share with a class.

Can I make my own Science crossword?

Yes. The free Grid Genius crossword maker builds a puzzle from your own words and clues, with a printable grid and answer key. The Grid Genius app can also generate a complete crossword from any topic you type.