Earth & Space
Animals
Human Body
Science Riddles
Weird Science Facts
100

What planet do we live on?

Earth
100

What is the largest animal on Earth?

Blue whale

100

How many eyes does a typical human have?

2
100

I fall from the sky, but I'm not rain. I sparkle at night. What am I?

Star

100

What is the only planet known to support life?

Earth

200

What star is at the center of our solar system?

Sun

200

What is the fastest land animal?

Cheetah

200

What organ pumps blood through your body?

Heart

200

I have a face and two hands, but no arms or legs. What am I?

Clock

200

What is the hottest planet in our solar system?

Venus

300

What planet is known as the Red Planet?

Mars

300

What animal is known for carrying its house on its back?

Turtle (or Snail) 

300

How many bones are in the adult human body?

206

300

What gets wetter the more it dries?

Towel

300

What animal can sleep while standing up?

Horse

400

What causes day and night?

Earths Rotation 

400

What is the only mammal that can truly fly?

Bat

400

What is the largest organ in the human body?

skin

400

I go up but never come down. What am I?

Your Age

400

What is the hardest natural substance on Earth?

Diamond

500

What is the largest planet in our solar system?

Jupiter

500

Which animal has three hearts?

Octopus

500

What part of your body sends messages to the rest of your body?

Brain

500

The more you take away from me, the bigger I get. What am I?

A hole

500

How many stomachs does a cow have?

4