Biology
Optics
Chemistry
Climate Change
???

100

An structural layer made of cellulose surrounding the cell
What is a cell wall

100

A mirror that is curved inwards
What is a Concave Mirror

100

H2O
What is the formula of water

100

The environmental Conditions that occur at a particular place at a particular time
What is weather

200

A group of organs that work together and provide an organism with an advantage for survival
What is a system

200

A Light that can produce all the colors you see
What is White Light

200

CH4
What is Methane

200

The envelope of gases surrounding the Earth
What is an Atmosphere

300

Hydrogen, Oxygen, Fluorine, Bromine, Iodine, Nitrogen, Chlorine
What is HOFBrINCl

300

Carbon Dioxide in an example of this
What is Green House Gases (G.H.G)