Science Riddles for Middle School Minds

🔬 Lab coats optional, curiosity required.

These science riddles for middle school mix physics, chemistry, biology, and Earth science to keep learners thinking beyond the textbook.

I orbit the Sun once a year and wear blue and green. What am I?

I am made of two parts hydrogen and one part oxygen. What am I?

I am invisible but I make balloons float up. What am I?

I split white light into all the colors of the rainbow. What am I?

I am the force that pulls apples to the ground and keeps planets in orbit. What am I?

I shine far away and twinkle at night, burning for millions of years. What am I?

I am a band of rocky objects circling between Mars and Jupiter. What am I?

I am the hottest planet even though I’m not closest to the Sun. What am I?

I cover your body, protect you from germs, and help you feel touch. What am I?

I carry oxygen like tiny red boats through your bloodstream. What am I?

I have no shape of my own but I take the shape of my container while keeping my volume. What am I?

I am measured on the Richter scale and can shake the ground.

I am a scientist who studies rocks and minerals. Who am I?

I am made of protons, neutrons, and electrons. What am I?

I am the center of an atom where most of its mass lives. What am I?

Ready to Test Your Brain?