A
A regular pattern of change
What is a cycle?
An important gas for living things to grow and function normally.
What is nitrogen?
Something that may occur when an ecosystem receives less water than it needs.
What us a drought?
This may be the largest man-made stress.
What is habitat destruction?
Water falling to earth.
What is precipitation?
A cycle of the earth that is the regular division of the year.
What are seasons?
The process of water vapor changing to a liquid.
What is condensation?
This may occur when an ecosystem receives more water than it can use or store.
What is a flood?
Someone who finds the right balance so that resources are used and not wasted.
What is a steward?
Precipitation that soaks into the ground and is stored there.
What is ground water?
The process in which plants take in carbon dioxide and release oxygen.
What is photosynthesis?
Turns most nitrogen into a usable compound.
What is bacteria?
Any physical hazard to life caused by having too much or too little of things needed for life.
What is stress?
A population of a species that is so small that there is a danger of it becoming extinct.
What is endangered?
Anything that makes the water, air or land dirty.
What is pollution?
Winds that change direction with the seasons and control the wet and dry seasons in some areas.
What are monsoons?
When the sun warms the earth and some if its water changes from liquid to vapor.
The gradual changes in the populations of an ecosystem.
What is succession?
A species that is not native to an area and can cause harm.
What is invasive?
The process in which animals breathe in oxygen and breathe out carbon dioxide.
What is respiration?
During respiration organisms use this with oxygen to produce energy.
What is sugar?
The process in which plants release water vapor into the air.
This can actually be beneficial to an ecosystem by getting rid of dead trees and recycling nutrients to make the soil rich and fertile.
What is a forest fire?
A plant or animal that could become endangered in the near future.
What is threatened?
What is competition?