5.2

Dissolved in rain or snow, the nitric acid falls as ______

Acid precipitation

Because many phosphate salts are not soluble in water, they sink to the bottom and ______

Accumulate and sediment

Carbon exists in__________

Air, water and living organisms

Nitrogen must be _________ before organisms can use it

Altered or fixed

All organisms need nitrogen to __\______\ which are used to build new cells

Build proteins

The__________ is the movement of carbon from the nonliving environment into living things and back

Carbon cycle

During cellular respiration, some of the carbon is released back into the atmosphere as

Carbon dioxide

Producers convert __________ in the atmosphere into carbohydrates during photosynthesis

Carbon dioxide

Proteins, fats and carbohydrates which make up all organisms

Carbon is the essential component of

Molecules may form deposits _________which are know as __________

Coal, oils, or natural gas and fossil fuels

_______ breaks down decaying plants and animals, as well as plant and animal wastes

Decomposers

Carbon stored in the bodies of organisms as ___________ may be released into the soul or air when an organism dies

Fats, oils, or other molecules

_______ which people use to stimulate and maximize plant growth contain nitrogen and phosphorous

Fertilizer

Global warming is an____________ of the earth

Increase in temperature

Some carbon is stored in__________ forming one of the largest___________ on earth

Limestone, carbon sink

In the air, nitric oxide can combine with oxygen and water vapor to form______

Nitric acid

When fuel is burned large amounts of ___\____ is release into the air

Nitric oxide

The ________ is the process in which nitrogen circulated among the air, soil, water, plants, and animals in an ecosystem

Nitrogen cycle

After decomposers return nitrogen to the souls, bacteria transform a small amount of the nitrogen into _________ which then returns to the atmosphere to complete the cycle

Nitrogen gas

Excess algae can deplete an aquatic ecosystem of imports nutrients such as ___\_ on which fish and other aquatic organisms depen

Oxygen

Small amounts of phosphorus dissolve as \_____[_ which moves into the soil

Phosphate

________is an element that is part of many molecules that make up cells of living organisms

Phosphorus

The _________ is the cyclic movement of phosphorus in different chemical forms from the environment to organisms then back to the environment

Phosphorus cycle

Excess nitrogen and phosphorous can cause

Rapid growth of algae or algae bloom

Excessive amounts of fertilizer can enter terrestrial and aquatic ecosystems through ________

Runoff

Plants get the phosphorus they need from_____[_[[[ while animals get theirs by___________ that have eaten plants

Sooo and water/ eating plants or other animals