The Solar System
Anatomy & Physiology
Physics
Chemistry
Zoology
100
This person was the first to walk on the moon.

Who is Niel Armstrong?

100

These cells are your body's immune response.

What are white blood cells?

100
This particle is considered the smallest unit of matter.

What is an atom?

100

This tool is used to measure radiation.

What is a Geiger Counter?

100

This is the largest land animal alive today weighing in at 7 tons.

What is the (African) elephant?

200

This planet is the hottest in our Solar System.

What is Venus?

200

This blood type is considered the universal donor.

O negative.

200

These are the four states of matter.

What are solid, liquid, gas, and plasma?

200

This is the type of reaction in which energy is released into the surrounding environment.

What is an exothermic reaction?

200

This is the number of wing sets a bee has.

What is two?

300

This planet is the closest to the sun and the smallest in our Solar System.

What is Mercury?

300

This bone is the largest in the human body.

What is a femur (or thigh bone)?

300

This physicist declared the law "For every action there is an opposite and equal reaction."

Who was Isaac Newton?

300

This is the number of elements listed on the periodic table.

What is 118?

300

This animal is the only cat that can change direction in midair.

What is a cheetah?

400

This planet is farthest from the sun.

What is Neptune?

400

This is the largest organ in the human body.

What is the dermis (or skin)?

400

This temperature is considered room temperature in scientific conditions.

What is 72 degrees Fahrenheit or 37 degrees Celsius? 

400

When electron pairs are shared between two atoms, it creates this type of bond.

What is covalent?

400

Using organs called ampullae of Lorenzini, sharks sense this phenomenon.

What is electricity? 

500

This is the color of a sunset on Mars.

What is blue?

500

This is the smallest bone in the human body.

What is the stapes (stirrup) bone? (This bone is found in your ear)

500

This Greek letter is used to represent denisty.

What is ρ (lowercase rho)?

500

This element was undetectable until 1939 and left a hole in the periodic table for years - confusing scientists.

What is Francium (element 87)?

500
An octopus has 8 tentacles, but only ___ are considered arms.

What is six?