Biology and life science
Periodic table
Astronomy and space
Chemistry
Earth science
100

 A change of the DNA in an organism that results in a new trait

What is a mutation

100

What's the abbreviation for Helium?

What is He

100

This planet is known as the "Red Planet"

What is Mars

100

Density, melting point, malleability, hardness, and color are all examples of this type of property.

What is physical property

100

This is the breakdown of rock into smaller pieces

What is weathering

200

This anatomical plane divides the body into right and left parts

What is the sagittal plane

200

What's the abbreviation for Hydrogen? 

What is H

200

This is the force that keeps planets in orbit around the Sun

 What is gravity

200

This substance is often considered to be a "universal" solvent

What is water

200

Volcanic glass formed when lava cools quickly, usually black

 What is obsidian

300

These cellular compartments store digestive enzymes

What are lysosomes

300

What's the abbreviation for Hassium?

What is Hs

300

 It is the largest star in our solar system

 What is the Sun

300

A mixture that is the same throughout is known as this 

 What is homogeneous

300

This part of the Earth's interior is believed to produce the planet's magnetic field.

What is the core

400

This organelle is responsible for the synthesis and packaging of secretory proteins

What is the rough endoplasmic reticulum

400

What's the abbreviation for Lanthanum?

What is La

400

The name of the galaxy that contains our solar system

 What is the Milky Way

400

What is the temperature in Celsius that corresponds to absolute zero

What is 273.15




400

This is the name of the landmass before the continents drifted apart

What is Pangaea

500

This animal of Southeast Asia is identified as the closest living relative of the dodo

 What is the Nicobar pigeon

500

What's the abbreviation for praseodymium?

What is Pa

500

 The second brightest star in the night sky

What is Sirius (or Canes Major)

500

 In an electrolytic cell, this electrode is the opposite of an anode

What is a cathode

500

this is the percentage of the Earth's water supply that is saltwater

What is more than 96% (or 97%)