SCS 7th Grade Science ch 8 vocab

twobernardboys's version from 2017-05-16 22:57

Section 1

Question Answer
OrganismA living thing.
HabitatThe environment that provides the things a specific organixm needs to live, grow, and reproduce.
Biotic factorThe living parts of an organism's habitat.
Abiotic factorThe nonliving parts of an organism's habitat
SpeciesA group of organisms that can mate with each other and produce offspring that can also mate and reproduce.
PopulationAll the members of one species living in a particular area.
CommunityAll the different populations of species that live together in an area.
EcosystemThe community of organisms that live in a particular area, along with their nonliving environment.
EcologyThe study of how organisms interact with each other and with their environment.

Section 2

Question Answer
NicheThe role of an organism in its habitat.
CompetitionThe struggle between organisms to survive as they attempt to usse the same limited resources.
PredationAn interaction when one organism kills another for food or nutrients.
PredatorThe organism that does the killing.
PreyThe organism that is killed.
SymbiosisAny relationship in which two species live closely together and at least one of the species benefits.
MutualismA symbiotic relationship where both species benefit.
CommensalismA symbiotic relationship where one species benefits and the other is neither helped or harmed.
ParasitismA symbiotic relationship where one organism living with, on, or inside another organism and harming it.
ParasiteThe organism that benefits in a parasitism relationship.
HostThe organism that a parasite lives on or in.

Section 3

Question Answer
BiomeA group of ecosystems with similar climates and organisms.
ClimateThe average annual temperature and amount of percipitation in an area.
DesertAn area that receives less than 25 centimeters of rain per year.
Rain forestForests in which large amounts of rain fall yearly.
Emergent layerThe tallest layer of the rain forest which receives the most sunlight and can reach up to 70 meters.
CanopyThe leafy roof underneath the emergent layer formed by trees up to 50 meters tall form
UnderstoryThe layer of shorter trees and vines, around 15 meters high under the canopy.
GrasslandAn area that is populated mostly by grasses and other nonwoody plants.
SavanaAn area that receives as much as 120 centimeters of rain eachd year and is populated by scattered shrubs and small trees along with grass.
Deciduous treesTrees that shed their leaves and grow new ones each year.
Boreal forestsDense forests found in upper regions of the Northern Hemisphere
Coniferous treesTrees that produce their seeds in cones and have leaves shaped like needles.
TundraAn extremely cold and dry biome with mostly frozen soil.
Permafrost.The frozen soil of the tundra.

Section 4

Question Answer
EstuaryThe place where the fresh water of a river meets the salt water of an ocean.
Intertidal zoneThe area on a shore between the highest high-tide line and the lowest low-tide line.
Neritic zoneThe region of shallow water found below the low-tide line and extending over the continental shelf.

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