How is water important for living things and ecosystems?

A. photosynthesisB. respirationC. digestionD. all of the above

D. all of the above

True or False...Nutrients enter the biosphere from and outside source and are continually replaced in the cycles.

A. TrueB. False

B. False

The process that released carbon dioxide into the atmosphere is _____.

A. photosynthesisB. respirationC. transpirationD. desperation

B. respiration

What are the two key players in Nitrogen Fixation?

A. Legumes and symbiotic bacteriaB. ammonia nitrogenC. corn and soybeansD. amino acids and proteins

A. Legumes and symbiotic bacteria

True or False...Phosphorus cycles through the atmosphere.

A. TrueB. False

B. False

The main reservoir for phosphorus is _____.

A. remains of plants and animalsB. the atmosphereC. rocks and soilD. ocean water

C. rocks and soil

The main reservoir for carbon is the ____.

A. soil B. plants C. oceanD. atmosphere

D. atmosphere

The three types of fossil fuels stored in the earth are____.

A. coal B. gypsumC. natural gasD. oil

A. coal B. gypsumC. natural gas

Macronutrients and micronutrients cycle through ecosystems through _____ cycles.

A. geologicalB. biotic and abioticC. atmosphericD. biogeochemical

D. biogeochemical

The main reservoir of water on earth is ____.

A. riversB. lakesC. oceansD. glaciers

C. oceans

What are macronutrients?

A. nutrients used by organisms in small amounts B. nutrients used by organisms in large amounts C. elements that we will run out of because they do not recycleD. iodine, iron, zinc

B. nutrients used by organisms in large amounts

How does carbon enter the biotic part of the ecosystem?

A. Secondary consumers eat other animals B. Primary consumers eat plantsC. Secondary consumers eat primary consumersD. Carbon enters through the water

B. Primary consumers eat plants

How does phosphorus get out of the rocks where it is stored?

A. By erosion, water washes over the rocks and release phosphorusB. plant roots break rocks apart and release phosphorus C. Transpiration releases phosphorus. D. The burning of fossil fuels release phosphorus.

A. By erosion, water washes over the rocks and release phosphorus

____% of the air is nitrogen gas.

A. 22B. 42C. 68D. 78

D. 78

Clover, peas, alfalfa, and soy beans are examples of _____.

A. legumesB. cattle feedC. brown plantsD. annual plants

A. legumes

____ is the product of nitrogen fixation.

A. solid nitrogenB. nitrogen gas C. ammoniaD. ammonium nitrate

C. ammonia

Humus, silt, clay, and sand are all parts of____.

A. soilB. fungi C. rocks D. plants

A. soil

What products do plants produce from carbon? (more than one answer)

A. glucose B. maltoseC. starches D. cellulose

A. glucose C. starches D. cellulose

What happens to phosphorus in the ocean?

A. It forms the sea foam that washes onto the shoreB. It forms rocks and sea mountainsC. It is incorporated into the bones and bodies of marine animalsD. It remains suspended in the water

C. It is incorporated into the bones and bodies of marine animals

What are micronutrients?

A. nutrients used by organisms in small amounts B. nutrients used by organisms in large amounts C. elements that we will run out of because they do not recycleD. carbon, hydrogen, oxygen nitrogen and phosphorus

A. nutrients used by organisms in small amounts

Nitrate is a product of ____.

A. ammonification B. nitrogen fixationC. denitrificationD. nitrification

D. nitrification

Which of the following compounds contain phosphorus? (more than one answer)

A. ATP B. glucoseC. nucleic acidsD. coenzyme NADP

A. ATPC. nucleic acidsD. coenzyme NADP

How has the amount of nutrients on earth changed through time?

A. The amount has increased. B. The amount has decreased. C. The amount has remained constant.

C. The amount has remained constant.

The phosphorus cycle is different from the other biogeochemical cycles because is does not involve the atmosphere. Which pair of cycles has the greatest interaction with the phosphorus cycle?

A. nitrogen and hydrologic B. carbon and nitrogenC. carbon and sulfurD. rock and hydrologic

D. rock and hydrologic

A farmer decides to reduce the number of legume crops this year. How will this effect the number of nitrogen-fixing bacteria change?

A. The number of bacteria will increase.B. The number of bacteria will decrease.C. The number of bacteria will not change.

B. The number of bacteria will decrease.

Which cycle could be blamed for "Global Warming"?

A. carbon cycleB. water cycleC. nitrogen cycleD. phosphorus cycle

A. carbon cycle

An example of a micronutrient is ___ and an example of a macronutrient is ____.

A. zinc/carbonB. carbon/zincC. oxygen/carbon dioxideD. carbon dioxide/oxygen

A. zinc/carbon

Which human activities can contribute to ocean pollution due to runoff? (more than one answer)

A. planting cover crops and employing contour plowing methods to prevent erosionB. strip mining and deforestationC. building cities and highwaysD. growing crops and burning fossil fuels

B. strip mining and deforestationC. building cities and highwaysD. growing crops and burning fossil fuels

In the water cycle, the sun’s energy causes ____.

A. evaporation.B. condensation.C. precipitation.D. percolation.

A. evaporation.

Carbon enters the biotic part of an ecosystem through _____.

A. respirationB. fermentationC. digestionD. photosynthesis

D. photosynthesis