a substance that occurs naturally.
a move in the ocean.
a long narrow mass of coral or other substances.
It is a type of glacier.
a large collection of flora and fauna.
a naturally-formed feature on the Earth's surface.
a solid substance.
a biological process by which an animal physically change.
Example of a landform.
(Use capital letters and plural form)
They are made of a fungus and an algae.
What does CO2 mean?
It is a large collection of flora and fauna.
This component gives the green color to the plans.
They are made up of fallen snow.
It is the process that provides food to the plans.