Science Riddles with Answers

I have a nucleus and build living things. What am I?

I control tides and glow at night. What am I?

Plants take me in and people breathe me out. What am I?

Lava made me and cooling shaped me. What am I?

I am the star giving Earth heat and light. What am I?

I pull without being seen. What am I?

I am the fastest traveler in the universe. What am I?

I change liquid water into gas. What am I?

I move electrons through a path. What am I?

I build proteins in living things. What am I?

I pump life through the body. What am I?

I am an icy rock with a glowing tail. What am I?

I help compare experiment results fairly. What am I?

I wrap Earth like a blanket of air. What am I?

I orbit a nucleus with negative charge. What am I?

I am two hydrogen atoms and one oxygen atom. What am I?

I split light into rainbow colors. What am I?

I am the code of heredity. What am I?

I am the gas humans need to breathe. What am I?

I am the force that resists motion between surfaces. What am I?

I am the tool for measuring heat. What am I?

I am the process plants use to make sugar. What am I?

I am the tiny building block of matter. What am I?

I am the place where an organism lives. What am I?

I am the molten rock below the surface. What am I?

I never stop moving: evaporate, condense, rain, repeat. What am I?

I am the bend of light through a lens. What am I?

I am the guess a scientist tests. What am I?

I am the charted result from an experiment. What am I?

What do plants make from sunlight, water, and carbon dioxide?