The process in which nitrogen circulates and is recycled is called

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

Respiration is the process by which animals take in _____ and release _____ to make energy. 

Which process contributes carbon dioxide to the atmosphere?

Plants use ____________________ to make their own food.

How do animals get carbon?

Ground that is always frozen is called:

What is the most important characteristic of a biome?

What type of trees grow in the taiga biome?

Which aquatic biome is characterized by where rivers meet oceans?

What factors have an effect on the climate of a biome?

What term best describes a group of ecosystems with similar climates and organisms?

What are the 2 types of aquatic biomes?

The kind of wetland formed where saltwater and fresh water meet is called

_________ is the amount of salt dissolved in water.

Oceans contain...

Another name for an ocean biome is

Fire, drought, and grazing prevent the growth of trees and shrubs. Not able to support trees, but rich soil supports tall grasses and flowering plants.

No trees, only mosses, grasses and small shrubs. Very cold.

Many trees create a canopy and understory layer that shields a lot of sunlight. The soil is thin and poor in nutrients.

Contains animals such as birds, opossums, snakes, deer, rabbits, and bears.

Home to animals such as Porcupine, elk, moose, wolves, and bear.

An area that receives less than 25 cm of precipitation a year. The amount of evaporation is greater than the amount of precipitation.

Found in very warm, tropical, and shallow waters; most biodiversity for aquatic biomes.

The largest biome on earth which is broken into four major zones.

the deepest, darkest area of the ocean beyond the edge of the continental shelf