Download DEFINING KEY TERMS 1points each (14 points)

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Coppin State College
Department of Natural Sciences
Exam 2. PHSC 103.001
Winter Semester (Dr. Amah)
This examination covers chapters 3, portions of 4 and 5. Please complete every section of this
examination
Name ________________________________________________________________ _____
Last
First
DEFINING KEY TERMS 1points each (14 points)
Use these terms to complete the sentences below.
Biomass
Food webs
Decomposers
Producers
Herbivores
Carbon cycle
Sulfur cycle
Parasites
Abiotic factors
Detritus
Acids
Hypothesis
Secondary Producers
Food chains
Phytoplankton
Molecule
Protons
Tertiary consumers
Interspecific competition
Intraspecific conpetition
Hydrological cycle
Carnivores
Nitrogen cycle
Phosphorous cycle
Ectoparasite
Endoparasite
Biotic factors
bases
habitat
Niche
Isotope
Ecosystem
Plankton
Electrons
1.
Competition between members of different species. _____________________ .
2.
Animals that eat other meat eating animals are ________________.
3.
________________ are a category of organisms that feed on dead plant and animal
material.
4.
Dead organic material is called______________.
5.
Accumulation of organic material produced by living things ____________________
6.
Atoms of the same element that have the different number of
neutrons.__________________.
7.
The plant species that are the primary producers in the oceans and other aquatic
environment are termed ____________________
8.
_________are really interconnected food chains.
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9.
The physical and chemical changes of nitrogen atoms in the atmosphere, biosphere and
lithosphere are termed the _______________
10.
___________________________ Parasites that live on the outside of its host.
11.
.
12.
A region in which an organism lives______________
13.
Compounds with high number of hydroxide ions or high pH _____________________
14.
Positively charged particles of an atom _______________
The flow of carbon from the atmosphere to living organisms and back
again____________
II. Answer the following questions true/false: 3 points each (60 points)
1.
_____ A theory is a broadly written statement that covers large bodies of scientific
knowledge.
2.
_____ Water is distilled when it evaporates into the atmosphere.
3.
_____ Environmental science is a narrowly defined field of physical and biological
sciences.
4.
_____ Predators may often receive a higher dose of pesticides than their prey due to the
process of biological magnification.
5.
_____ The scientific method involves observation, hypothesis formation, hypothesis
testing, critical evaluation of results and publishing of finding.
6.
_____ The fundamental unit of matter is the sugar molecule.
7.
_____ Photosynthesis is the process whereby animals break down large molecules such
as sugar into smaller molecules.
8.
_____ An acid is an ionic compound that releases hydroxide ions.
9.
_____ Potential energy is the energy contained in moving objects.
10.
_____ Commensal organisms live on another organism and harm the host in the
process.
11.
_____ At the highest trophic level, there is less energy and fewer organisms than at the
lower levels.
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12.
_____ Symbiotic relationship are those in which organisms live in physical contact with
one another.
13.
_____ The abiotic component of an organism’s environment is the non-living or physical
factors.
14.
_____ Competition between members of the same species is known as intraspecific.
15.
_____ Because it is good solvent, water creates and moves pollution problems.
16. _____ The movement of phosphorous through ecosystems is largely controlled by
microorganisms.
17. _____ Energy and materials move in a similar fashion through ecosystem, but energy is
not cyclic.
18.
_____ Energy moves through an ecosystem by one organism eating another one.
19.
_____ Everything that affects an organism during its lifetime is known as ecology.
20. _____ The forest fires that raged through Mexico in 1998 had no impact on the United
States, but caused severe air pollution in Central America.
III. Multiple Choice Questions: .Answer each question by circling the alphabet of your
choice. There is only one correct answer. 2 Points each (26 points)
1. The nucleus of an atom contains?
a. Only electrons
b. Electrons and protons
c. Only protons
d. Protons and neutrons
2. What is the most important structural material in living organism?
a. Oxygen
b. Nitrogen
c. Carbon
d. Water
3. What is the process through which atmospheric carbon is incorporated into living
organism?
a. Photosynthesis
b. Decomposition
c. Respiration
d. Transpiration
4. Which of the following organisms is a primary producer?
a. fungi
b. grasshoppers
c. grass
d. bacteria
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5. Which of the following is NOT a decomposer?
a. fungi
b. bacteria
c. moss
d. none of the above
6. In a mutualistic relationship:
a. One organism benefits while the other is unaffected
b. Both species benefit
c. One organism benefits while the other is harmed
d. All of the above
7. Phytoplankton refers to:
a. detritus
b. primary consumers
c. drifiting aquatic plants
d. bacteria
8. Each step in the flow of energy through the ecosystem is known as a?
a. Food chain
b. Trophic level
c. Plateau of consumption
d. Food web
9. Tapeworms living inside the intestines of their host is an example of what type of
relationship?
a. symbiosis
b. commensalism
c. ectoparasitism
d. endoparasitism
10. What is the fundamental subunit of matter?
a. molecule
b. compound
c. atom
d. mixture
11. Which of the following small molecules are converted to form sugar in photosynthesis?
a. oxygen an water
b. hydroxyl ion and hydrogen
c. carbon dioxide and oxygen
d. water and carbon dioxide
12. Bioaccumulation of pollutants in the food chain results in:
a. a low concentration of pollutants in top predators
b. a high concentration of pollutants in plants
c. a high concentration of pollutants in top predators
d. a high concentration of pollutants in herbiviores
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13. An ecosystem is:
a. a body of freshwater
b. the transition zone between grassland and desert
c. a group of interactive species and their environment
d. none of the above
Extra Credit: 5 points
Diagram a simple Food Web that might exist in the area that you live. What are the producers,
the consumers, and decomposers in this Food Web?