Science Hangman uses vocabulary from space, life science, Earth science and simple physics as its secret words. The 100 terms run from short words like atom and germ to the 14-letter photosynthesis. Each comes with a kid-friendly meaning, so the game doubles as a science vocabulary review.
The science vocabulary list
The list follows topics found in most elementary and middle school science classes.
| Word | Letters | Meaning |
|---|---|---|
| atom | 4 | The tiny building block of everything. |
| battery | 7 | A small store of electric power. |
| carbon | 6 | An element found in all living things. |
| energy | 6 | The power to make things move or change. |
| fossil | 6 | The remains of a very old plant or animal in rock. |
| gravity | 7 | The pull that keeps us on the ground. |
| habitat | 7 | The natural home of a plant or animal. |
| insect | 6 | A small animal with six legs. |
| magnet | 6 | An object that pulls on iron and steel. |
| molecule | 8 | Two or more atoms joined together. |
| oxygen | 6 | The gas we need to breathe. |
| planet | 6 | A large world that circles a star. |
| rocket | 6 | A vehicle that blasts into space. |
| seed | 4 | The part of a plant that grows into a new plant. |
| telescope | 9 | A tool that makes far-away things look closer. |
| virus | 5 | A tiny germ that can make living things sick. |
| weather | 7 | What the air is like outside: rain, sun or wind. |
| comet | 5 | A ball of ice and dust with a glowing tail. |
| crystal | 7 | A solid with flat sides in a neat pattern. |
| eclipse | 7 | When one space object blocks the light of another. |
| friction | 8 | A force that slows things when they rub. |
| galaxy | 6 | A huge group of stars, gas and dust. |
| laser | 5 | A narrow, strong beam of light. |
| liquid | 6 | Something that flows, like water or juice. |
| microscope | 10 | A tool that makes tiny things look big. |
| orbit | 5 | The path one object takes around another. |
| photosynthesis | 14 | How plants make food from sunlight. |
| prism | 5 | Glass that splits light into a rainbow. |
| robot | 5 | A machine that can do jobs by itself. |
| skeleton | 8 | The frame of bones inside a body. |
| thermometer | 11 | A tool that measures how hot or cold it is. |
| volume | 6 | How much space something takes up. |
| evaporate | 9 | To change from a liquid into a gas. |
| experiment | 10 | A test to find out what happens. |
| hypothesis | 10 | A smart guess you can test. |
| nucleus | 7 | The center of an atom or a cell. |
| predator | 8 | An animal that hunts other animals. |
| satellite | 9 | An object that circles a planet. |
| vapor | 5 | Tiny drops of liquid floating in the air. |
| germ | 4 | A tiny living thing that can cause sickness. |
| acid | 4 | A sour chemical. |
| asteroid | 8 | A space rock orbiting the sun. |
| bacteria | 8 | Tiny living things. |
| biology | 7 | The study of living things. |
| cell | 4 | The tiny building block of life. |
| chemistry | 9 | The study of what things are made of. |
| circuit | 7 | A loop electricity flows around. |
| climate | 7 | Weather over many years. |
| condense | 8 | To turn from gas into liquid. |
| data | 4 | Facts collected to study. |
| dinosaur | 8 | A giant reptile from long ago. |
| earthquake | 10 | A shaking of the ground. |
| ecosystem | 9 | Living things and their home together. |
| electron | 8 | A tiny particle with a charge. |
| element | 7 | A pure substance like gold. |
| erosion | 7 | Wearing away of land. |
| force | 5 | A push or a pull. |
| freeze | 6 | To turn into ice. |
| gas | 3 | Matter that spreads out, like air. |
| gene | 4 | Instructions passed from parents. |
| glacier | 7 | A slow river of ice. |
| heat | 4 | Energy that makes things warm. |
| lava | 4 | Hot melted rock. |
| lens | 4 | Curved glass that bends light. |
| mammal | 6 | A warm-blooded animal with hair. |
| mass | 4 | How much matter something has. |
| meteor | 6 | A space rock that burns up. |
| mineral | 7 | A natural solid found in rocks. |
| motion | 6 | Moving from place to place. |
| nebula | 6 | A cloud of gas in space. |
| neutron | 7 | A particle in an atom's center. |
| nutrient | 8 | Food that helps living things grow. |
| observe | 7 | To watch carefully. |
| organ | 5 | A body part with a job. |
| physics | 7 | The study of energy and motion. |
| pollen | 6 | Yellow dust from flowers. |
| proton | 6 | A positive particle in an atom. |
| reptile | 7 | A cold-blooded animal with scales. |
| solar | 5 | Having to do with the sun. |
| solid | 5 | Matter that keeps its shape. |
| sound | 5 | Vibrations you can hear. |
| species | 7 | A kind of living thing. |
| spectrum | 8 | The colors of a rainbow. |
| tide | 4 | The rise and fall of the sea. |
| vaccine | 7 | Medicine that teaches the body to fight germs. |
| vibrate | 7 | To shake back and forth fast. |
| volcano | 7 | A mountain that can erupt. |
| watt | 4 | A unit of power. |
| wavelength | 10 | The distance between waves. |
| magnify | 7 | To make look bigger. |
| pulley | 6 | A wheel that helps lift things. |
| lever | 5 | A bar that helps lift loads. |
| static | 6 | Electricity that makes hair stand up. |
| sediment | 8 | Bits of sand and mud that settle. |
| fungus | 6 | A living thing like a mushroom. |
| kelvin | 6 | A unit of temperature. |
| moon | 4 | A body that orbits a planet. |
| stem | 4 | The stalk of a plant. |
| root | 4 | The part of a plant underground. |
| evolve | 6 | To change slowly over time. |
Word parts that help you guess
Science words are built from smaller parts. Tele means far, so a telescope sees far. Micro means small, so a microscope looks at small things. Photo means light, so photosynthesis uses light. Thermo means heat. If you spot one of these parts in the blanks, the rest of the word often falls into place.
Play the science round
- Step 1
Guess E, O and T
These letters fill many science terms like molecule and rocket.
- Step 2
Look for word parts
Micro, tele, photo and thermo are big clues.
- Step 3
Explain the word
Read the meaning and give an example out loud.
When science words fit best
- Science fair week
- Space unit review
- Before a lab day
- STEM club warm-up
- Studying for a science test
- Museum trip prep
Frequently asked questions
What are good science words for Hangman?
Planet, magnet, fossil, rocket and gravity are well known and fair. For a challenge, try hypothesis, photosynthesis or thermometer.
What is the longest word in the science list?
Photosynthesis has 14 letters, making it the longest. Long words are easier to guess than you might expect because so many common letters land.
What is a hypothesis?
A hypothesis is a smart guess you can test with an experiment. Scientists write one before they test an idea. It has a Y and a PH, which makes it tricky to spell.
Can science Hangman help with test prep?
Yes, as a review game. Play the list, then explain each word in your own words after the round. For unit-specific terms, make a custom game.
Which grade levels are these science words for?
Most fit grades 3 to 6. A few, like atom and seed, work for younger kids, while nucleus and hypothesis suit older students.
What is the difference between a comet and a planet?
A planet is a large world that travels around a star. A comet is a small ball of ice and dust, and it grows a glowing tail when it passes near the sun.
Can I use science Hangman for a STEM club?
Yes. Split into teams, play on a shared screen, and award a bonus point for anyone who explains the word. It makes a fun five-minute opener.
What does photosynthesis mean?
It is how green plants make their own food. They use sunlight, water and a gas called carbon dioxide, and they give off oxygen. The word comes from Greek parts meaning light and putting together.
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