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Study Guide Answers

1.     The air layer circling the planet is called the ____________________________.
     atmosphere
2.     The layer of water on the planet, including oceans, lakes, streams, and ice is called the _____________________________.
     hydrosphere
3.     ______________________________ is the layer of soils, rocks, and minerals on the planet.
     Lithosphere
4.     The __________________________ is the thin, life-containing shell that encircles the planet.
     biosphere
5.     ___________________________ is the interaction of living organisms with each other, and with the components of the planet's layers of air, water, and soil.
     Ecosphere
6.     The agent of photosynthesis in green plants is called _____________________________.
     chlorophyll
7.     _____________________________ is the study of organisms in their home environment.
     Ecology
8.     The ________________________ is the source of the energy that sustains life on earth.
     sun
9.     A _________________________ is a group of organisms of the same kind in a given area, as in a flock of geese.
     Population
10.     _________________________ ____________________ is the organism's role within the community.
     Ecological Niche
11.     An environment's non-living structure, including wind, humidity, soil, and temperature is called the ___________________________ _____________________________.
     abiotic structure
12.     The single physical factor most lacking in a particular place is the ____________________ ________________________.
     limiting factor
13.     ________________________ __________________________ are the variations in learned behaior that allow humans to survive in varied environments.
     Cultural traditions
14.     Land-based life zones named for dominant types of vegetation are called _________________________.
     biomes
15.     A _______________________ is the northernmost coniferous forest life zone.
     Taiga
16.     The combination of different species interacting with one another and with components of the non-living environment is called ____________________________.
     ecosystems
17.     ____________________________ are self-nourished producers that use solar energy to produce organic compunds from water and carbon dioxide.
     Autotrophs
18.     __________________________ are plant-eating animals.
     Herbivores
19.     Animals that eat other animals are called ___________________________.
     carnivores
20.     Animals that regularly consume both plant and animal foods are ___________________________.
     omnivores
21.     _________________________ are animals that feed on dead organisms and the wastes of living organisms.
     Detrivores
22.     The _________________________ ____________________ is the movement of water from oceans to the atmosphere, back to the earth, and finally back to the oceans.
     Hydrological Cycle
23.     The __________________ __________________ is the transfer of energy from one organism to another.
     food chain
24.     Each major step in the transfer of energy from one organism to another is called a __________________ ____________________.
     trophic level
© Educational Video Network, Inc. 2005 - www.evndirect.com
Your leading source for curriculum-based educational videos and DVDs.