Test 3

Consider the aquatic phosphorus cycle. Phosphorus is the limiting nutrient for aquatic organisms. Decomposition naturally returns phosphorus to the aquatic cycle, but phosphates from fertilizers, sewage and detergents can cause pollution in lakes and streams. Over-enrichment of phosphate in freshwater can lead to __________ which, when they die and decay, leads to _____________.

Algal blooms; eutrophication

78% of Earth is nitrogen gas. All living things need nitrogen as a part of DNA and RNA. 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

Examine the model of the carbon cycle. Carbon is transferred from one biotic component, the cow, to a second biotic component, the decomposers, Using the model, select the one method that carbon is not transferred from animals to decomposers.

Carbon Dioxide (Co2)

The process of photosynthesis in the oxygen/carbon dioxide cycle. Photosynthesis removed ___ from the atmosphere and produces and releases ___ into the atmosphere

Carbon dioxide; oxygen

The carbon cycle is natures way of reusing carbon atoms, which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over and over. Select all the ways in which carbon is released into the atmosphere

Cellular respiration & auto and factory emission

Groundwater will increase

cold winter with lots of snow

2 important natural processes that release carbon into our atmosphere are

decomposition and respiration

what comes after precipitation during the water cycle

infiltration

transpiration will decrease

massive deforestation taken place

Precipitation decreases, groundwater decreases

prolonged drought

All but one of the words should be included in the water cycle

radiation

Carbon dioxide is returned to the atmosphere primarily by the

respiration of consumer

precipitation and evaporation are important components of the

water cycle

Carbon dioxide diffuses into the ocean carbon cycle via the air-sea surface exchange. Can you predict the changed to this model if average ocean temps increase as well?

Warmer ocean means less dissolved co2 as well as other gasses

Carbon is the basis for life on Earth. Plants used water, carbon dioxide from the air, and energy from sunlight to make food. This process is called photosynthesis. Animals eat plants, breathe in oxygen, and breathe out carbon dioxide. This is called respiration. Carbon is released into the atmosphere when plants and animals die and decompose. Carbon dioxide is also released into air through combustion

.

Phosphorus rich deposits Geologic processes Weathering of rocks Phosphorus is trnaformed the plants are consumed After death

.

The water cycle describes the continuous movement on, above, and below the surface of Earth. Study the diagram above. What cause and effect prediction can be used to test the assumptions?

Evaporation will cause the temp to decrease in the system

Which sequence lists the water cycle in order

Evaporation, condensation, precipitation, runoff

Evaporation increases

Hottest summer on record

This model of carbon cycle shows the continuous movement of carbon atoms between the biosphere. atmosphere, hydrosphere, and geosphere. What is a likely consequence of deforestation?

Increased atmospheric carbon

which nutrient 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 feeds lots?

Nitrogen

In an ecosystem, some plants may convert atmospheric nitrogen into ammonia through a process called

Nitrogen fixation

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

Overuse of fertilizers

During the water cycle, the suns energy evaporates water from the surface of Earth. This water is the source of

Precipitation