Hydrologic Cycle, Carbon Cycle, Nitrogen Cycle

. What living organism plays a big role in adding atmospheric nitrogen to the soil?

bacteria

What two processes fuel the carbon cycle?

cellular respiration and photosynthesis

In most ecosystems, nitrogen is primarily stored in living and dead organic matter. This nitrogen must be chemically modified from ammonia (NH3 ) to ammonium salts (NH4+ ) in the soil, so that it may be once again incorporated into plant tissues. This conversion is carried out by bacteria and fungi through the process of

decomposition

snow hail sleet rain These are all a source of __________ on the Earth

water

When deforestation occurs in an area, what immediate effect does this have on the water cycle?

More runoff water is created, and less is returned to the atmosphere

In the carbon cycle, carbon is transferred from animals to decomposers in all of the following ways EXCEPT

as carbon dioxide.

What is the correct sequence of events in the nitrogen cycle?

atmospheric nitrogen→bacteria→plants→animals

78% of Earth's atmosphere is nitrogen gas. All living things need nitrogen as a part of DNA and RNA. Yet you and I, and other living things, cannot use the nitrogen in our atmosphere directly. One type of organism is responsible for "fixing" nitrogen or helping to put it in a form so other living things can use it. That organism is

bacteria

What type of organism converts nitrogen into a usable form for plants?

bacteria

in order to be made available to life forms on Earth, nitrogen must be fixed or covered into a usable form by lightning strikes or

bacteria

The burning of fossil fuels by cars and factories has most affected the ______________ cycle.

carbon

clouds form in the air due to what process

condensation

When water evaporates, energy is removed and ____________

cools the environment

Much like the carbon cycle, the recycling of nitrogen through Earth's spheres relies heavily on what type of organism?

decomposers

Humans add greatly to the carbon cycle by

driving cars.

lists the water cycle in order

evaporation, condensation, precipitation, runoff/storage

Following the evaporation stage of the water cycle, the evaporated water

forms clouds

Burning of fossil fuels has changed the atmosphere by

increasing the concentration of carbon dioxide.

Under drought conditions, a likely change in the water cycle would be

less groundwater accumulates

What is the common name of this gas, N2, the most prevalent in our atmosphere?

nitrogen

Without heat from the Sun, the water cycle would

not work

What is a reason for the rise of nitrate levels in ground water?

overuse of fertilizers

The process of respiration is essential in the oxygen/carbon dioxide cycle. Respiration removes ______ from the atmosphere and produces and releases ______ to the atmosphere.

oxygen, carbon dioxide

CO2 is returned to the atmosphere by all methods EXCEPT

photosynthesis

During the water cycle, the sun's energy evaporates water from the surface of Earth. This water is the source of

precipitation.

During the water cycle, the sun's energy evaporates water from the surface of Earth. This water returns to Earth as some form of

precipitation.

All of the listed human actions affect the nitrogen cycle with the exception of the

runoff of pesticides into streams and lakes

Most of the earth's surface is covered with

salt water

Groundwater moves from the ground through plants and then back into the atmosphere through the process of

transpiration

Precipitation and evaporation are important components of the

water cycle

During a summer of extreme drought, what can we expect to happen to the surface ground water stored in ponds and lakes?

water levels will decrease because there is more evaporation and transpiration

. During an extreme rainy season, what can we expect to happen to the surface ground water stored in ponds and lakes?

water levels will increase because there is more precipitation

The dominant gas in the atmosphere that forms clouds is

water vapor

What cycle is most affected by the over-use of ammonia fertilizers on commercial farms, as well as by the accumulation of waste on cattle farms and feed lots?

Nitrogen Cycle

In the water cycle, water vapor evaporates into the atmosphere and forms clouds through condensation. What happens in the atmosphere to the water in order for the clouds to form?

The evaporated water cools and drops get closer together.