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Important for living things to grow
What is nitrogen?
last known member dies
What is extinction?
too much water
What is a flood?
Released during decomposition
What is carbon dioxide?
too little water
What is a drought?
One of earth's yearly cycles
What are seasons?
What are forest fires?
not many of a species left
What is endangered?
largest manmade stress
What is habitat destruction?
Areas of the earth that have only 2 seasons
What are wet and dry?
gradual change in population of organisms
What is succession?
provides energy for plants to make food
What is the sun?
Breathe in oxygen, breathe out carbon Dioxide
What is respiration?
original plants and animals
What are native plants?
species that can harm an ecosystem
What is an invasive species?
Four parts of the water cycle
What are precipitation, evaporation, transpiration, and condensation?
Regular pattern of change
What is a cycle?
water vapor into liquid
What is condensation?
These 2 are not part of the Nitrogen cycle
What are photosynthesis and respiration?
Nitrogen found in ? nodules on plants
What is root?
Manmade and physical hazards
What are stresses?
This and oxygen are needed to produce energy
What is sugar?
no beginning or end
What is a drought?
Eating other animals and plants
What is nitrogen?
Plants release water vapor through this
What is transpiration?
increased number of predators, disease, increased competition
What are problems caused by invasive species?
distribute soil and seeds, help sprouting trees
What are benefits of a flood?
dead plants and animals are broken down by this
What are bacteria?
habitat destruction, pollution, over hunting and fishing
What are man-made stresses?
winds that change direction with the seasons and control the rain
What are monsoons?