Cycles
Most parts of the earth have 4 seasons which are __________, __________, ____________ and __________.
spring, summer, fall, winter
Animals get __________ from the plants that they eat
carbon
Most nitrogen is changed by __________.
bacteria
What causes evaporation from bodies of water?
The gradual changes in the populations of organisms in an ecosystem are called _____________.
succession
One of earth's cycles in the
Animals take in ________ and release ___________.
oxygen, carbon dioxide
Many kinds of nitrogen changing bacteria are found in the soil living on _______________ of the root.
nodules
The step after evaporation is ___________.
condensation
The largest manmade stress is probably _________________.
habitat destruction
Which part of the ecosystem typically signifies season changes?
temperature
The process where plants use water, carbon dioxide from the air and energy from the sun to form sugar molecules and oxygen is the process of ______________.
photosynthesis
Animals get the proteins and nitrogen from __________________.
the plants and other animals that they eat
What causes water vapor to condense?
the cooling of the water vapor
Species that are not native to an ecosystem and can cause harm are ___________.
invasive
Winds that chance direction with the seasons are
monsoons
____________ takes place as bacteria, fungi, and other decomposers break down the bodies of dead things.
Decomposition
What do plants make with nitrogen compounds?
Proteins
What is the process through which plants release water vapor into the air?
transpiration
When the population of a species is so small that the species may soon become extinct, it becomes _____________________.
endangered
In some areas of the earth, temperatures don't change much so there are only 2 seasons: __________ and ____________.
wet, dry
The process where organisms use sugar molecules and oxygen to produce energy is _____________.
respiration
The nitrogen compounds formed by bacteria help plants to grow and the plants provide a habitat for the bacteria. This is an example of which type of symbiosis?
mutualism
What helps plants release water vapor?
stomata
The 3 manmade stresses (that we studied) are:
habitat destruction
pollution
excessive hunting and fishing