Riddles for Science Fairs and STEM Showcases

I bubble and fizz when vinegar says hello. What am I?

I split white light into every color you can name. What am I?

I whirl air in a bottle to show how storms begin. What am I?

I carry data on wings of copper and code. What am I?

I hover thanks to magnets that never touch. What am I?

I track plant growth, droplet by droplet, in three labeled cups. What am I?

I predict how far a paper airplane glides. What am I?

I compare control and variable to reveal the truth. What am I?

I spin in a petri dish, showing bacteria’s bloom. What am I?

I store solar energy for your phone on a sunny day. What am I?

I am the graph that proves your results. What am I?

I am the final page that explains what you learned. What am I?

I measure heartbeats before and after jumping jacks. What am I?

I float differently in salt water and fresh. What am I?

I am the reminder to wear goggles and tie back hair. What am I?