Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

11 Cards in this Set

  • Front
  • Back
What are the six most important elements necessary for life?
What are the most important inorganic molecules of the nitrogen cycle?
N2, NH3, NH4+, NO3-
How does nitrogen get from the atmosphere into a plant?
Nitrogen Fixation, N2 gas is absorbed by the flavonoids in the roots of plants.
What is climate?
average weather conditions of a place over a long period (30 years).
What is weather?
a condition of the atmosphere at a particular time and place (temperature, moisture, and cloudiness)
What is a microclimate?
environmental conditions in small areas, the difference between the climates on two sides of a large hill.
What are the main types of ecosystems or biomes?
tropical forest, desert, chaperral (shrubland), tundra, temperate forest, savanna, taiga, grassland
What are the main factors that influence how ecosystems are distributed across the earth?
temperature, and precipitation.
What is eutrophication?
excess nutrients (nitrogen) cause a body of water to become a dead zone.
Describe the process of eutrophication?
excess nutrients cause:

increase in plant/algai growth, increase in dead biomass, higher rates of decomposition (respiration), decline in light levels, low oxygen levels
Which ecosystem has the least primary productivity and why?
deserts, because they have little water and nutrients