Riddles for Science Class with Answers

I have a nucleus but no lungs; I build bodies yet stay unseen. What am I?

I’m the gas plants breathe in and people breathe out. I help bubble in soda too. What am I?

I am the closest star that gives Earth daylight. What am I?

I am a rock created by volcanoes, cooling into crystals. What am I?

I pull oceans and apples alike. What am I?

I’m the invisible shield blocking harmful rays. What am I?

I’m the charged particle buzzing along circuits to light up rooms. What am I?

I’m the change of state from liquid to gas, lifting puddles into clouds. What am I?

I’m DNA’s blueprint copy: same letters, different jobs. What am I?

I’m the simple machine that lifts with less force—see-saw in action. What am I?

I’m a star’s life after it explodes—dense, tiny, with strong gravity. What am I?

I wear a suit made of protons and neutrons. Electrons orbit me. What am I?

I’m a chemical reaction that releases heat—like logs in a fireplace. What am I?

I’m the tool that helps scientists compare a variable against one that stays the same. What am I?

I’m the study of weather patterns swirling above, predicting tomorrow’s forecast. What am I?