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HHS Chapter 20
ocean
61
Science
7th Grade
04/17/2007

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Term
ABIOTIC FACTORS
Definition
the non-living factors in the environment
Term
CLIMATE
Definition
the average weather conditions for an area over a long period of time
Term
BIOTIC FACTORS
Definition
the living factors in the environment
Term
BIOME
Definition
a large area characterized by its climate and the plants and animals that live in the area; it contains related ecosystems
Term
FOREST BIOME
Definition
a biome with mild temperatures and plenty of rain
Term
3 KINDS OF FOREST BIOMES
Definition
1-temperate deciduous forest
2-coniferous forest
3-tropical rain forest
Term
DECIDUOUS TREES
Definition
trees that shed their leaves to save water during the winter or during the dry season
Term
CHARACTERITICS OF A TEMPERATE DECIDUOUS FOREST
Definition
average temperature 43 - 82 degrees and 29.5 - 49 inches of rain
plants-deciduous trees, ferns, mosses, and woody shrubs
animals-bears, snakes, woodpeckers, and rabbits
Term
CHARACTERITICS OF A CONIFEROUS FOREST
Definition
average temperature 14 - 57 degrees and 14 - 29.5 inches of rain
plants-most trees are coniferous
animals-squirrels, insects, finches, porcupines, elk and moose
Term
CONIFERS
Definition
trees that produce seeds in cones and have special leaves shaped like needles; also called evergreen trees
Term
3 FUNCTIONS OF THE WAXY COATING OF CONIFER LEAVES
Definition
1-keeps leaves from drying out
2-protects needles from being damaged by cold temperatures
3-allows most conifer leaves to stay on year round
Term
CHARACTERISTICS of a TROPICAL RAIN FOREST
Definition
average temperature 68 - 93 degrees up to 157.5 inches of rain
more biological diversity than any other place on Earth
most animals live in canopy
most of the nutrients are found in the plants
Term
CANOPY
Definition
the layer of treetops
Term
3 OTHER NAMES for GRASSLANDS
Definition
STEPPE, PRAIRIE, PAMPAS
Term
2 MAIN TYPES OF GRASSLANDS
Definition
temperate grasslands and savannas
Term
CHARACTERISTICS of a TEMPERATE GRASSLAND
Definition
average temperature 32 - 86 degrees 10 - 29.5 inches of rain
plants-grasses and flowering plants but few trees
animals-prairie dogs, mice, bison
Term
CHARACTERISTICS of a SAVANNA
Definition
average temperature 61 - 93 degrees 59 inches of rain (rainfall is seasonal)
plants-scattered clumps oftrees
animals-elephants, giraffes, zebras, wildebeasts
Term
CHARACTERISTICS of a DESERT
Definition
average temperature 45 - 100 degrees less than 10 inches of rain
very hot and often dry
plants-cactus
animals-jackrabbits, lizards, kangaroo rats
Term
4 ADAPTATIONS DESERT PLANTS HAVE
Definition
1-grow far apart so they do not compete for water
2-have shallow, widespread roots to take up water during a storm
3-have fleshy stems and leaves to store water
4-have waxy coating to prevent water loss
Term
5 ADAPTATIONS DESERT ANIMALS HAVE
Definition
1-most are active at night (nocturnal)
2-some bury themselves under the ground during summer (estivation)
3-store water under shells
4-recycle water from foods
5-have huge ears to get rid of heat
Term
TUNDRA
Definition
a bione that is very cold (-15 - 54 degrees) and receives little rainfall (12 - 20 inches)
Term
2 TYPES OF TUNDRA
Definition
polar tundra and alpine tundra
Term
CHARACTERISTICS of POLAR TUNDRA
Definition
found near the North and South poles
has permafrost
plants-grasses, small shrubs, mosses and lichens
animals-insects, birds, musk oxen, wolves, caribou
Term
CHARACTERISTICS of ALPINE TUNDRA
Definition
found at the top of tall mountains
Term
PERMAFROST
Definition
a layer of soil beneath the surface soil that stays frozen all of the time
Term
TREE LINE
Definition
the elevation above which trees can not grow on a mountain
Term
How much of the EARTH'S SURFACE IS covered by OCEANS
Definition
3/4 of the Earth's surface
Term
MARINE ECOSYSTEMS
Definition
ecosystems found in the ocean
Term
What shapes MARINE ECOSYSTEMS
Definition
abiotic factors (temperature, amount of sunlight, and water depth)
Term
PLANKTON
Definition
tiny organisms that float near the surface of the water, they form the basis of the ocean's food chains
Term
3TEMPERATURE ZONES in the OCEAN
Definition
1-surface zone-warmest, heated by sunlight
2-thermocline-water temperature drops with increased depth quickly in this zone
3-deep zone-goes from bottom of thermocline to ocean bottom, very cold temperatures
Term
4 MAJOR OCEAN ZONES
Definition
1-intertidal
2-neritic
3-oceanic
4-benthic
Term
INTERTIDAL ZONE
Definition
the area where the ocean meets the land
Term
NERITIC ZONE
Definition
where the ocean floor starts to slope downward; the water here is warm with lots of sunlight; corals, sea turtles, fish and dolphins live in this zone
Term
OCEANIC ZONE
Definition
where the sea floor drops quickly; it contains the deep water of the open ocean, plankton, fish, whales, squid and sharks are in this zone
Term
BENTHIC ZONE
Definition
the ocean floor; there is no sunlight and the water is very cold; fish, worms, crabs, bacteria and sea urchins are found in this zone; animals in this zone get most of their food from dead materials that sink from above
Term
3 REASONS the OCEAN IS IMPORTANT
Definition
1-it provides most of out water through evaporation
2-the ocean temperature and currents affect the world's climate and wind patterns
3-humans and animals get food from the ocean
Term
3 INTERTIDAL AREAS
Definition
1-mudflats
2-sandy beaches
3-rocky shores
Term
2 ADAPTAIONS SOME ANIMALS HAVE FOR LIVING ALONG ROCKY SHORES
Definition
1-"holdfasts" root like structures to anchor themselves
2-a special glue to hold them in place
Term
How do CORAL REEFS DEVELOP
Definition
when corals die, they leave their skeleton behind and over time they build up and form a reef that is the home for many marine animals
Term
ESTUARY
Definition
an area where fresh water from streams and rivers spills into the ocean
Term
SARGASSO SEA
Definition
an ecosystem in the middle of the Atlantic Ocean
Term
SARGASSUMS
Definition
floating rafts of algae
Term
CHARACTERISTICS of the POLAR ICE ECOSYSTEM
Definition
it is located in the Arctic Ocean and in the ocean around Antarctica, the water is rich in nutriensts which supports lots of plankton, polar bears and penguins are also in this ecosystem
Term
a SPRING
Definition
a place where water flows from underground to the Earth's surface
Term
TRIBUTARY
Definition
a stream that joins a larger stream
Term
RIVER
Definition
a very strong, wide stream
Term
an IMPORTANT ABIOTIC FACTOR in FRESHWATER ecosystems
Definition
how quickly the water moves
Term
3 ZONES of a LAKE or POND
Definition
1-littoral zone
2-open-water zone
3-deep-water zone
Term
LITTORAL ZONE
Definition
the area of water closest to the shore
Term
ORGANISMS IN THE LITTORAL ZONE
Definition
algae, cattails, rushes, water lilies, snails, insects, clams, worms, frogs, salamanders, turtles, fish and snakes
Term
OPEN-WATER ZONE
Definition
the area of the lake or pond that stretches across the water between the littoral zones as deep as the sunlight will reach
Term
ORGANISMS IN THE OPEN-WATER ZONE
Definition
bass, lake trout, other fish, photosynthetic plankton
Term
DEEP-WATER ZONE
Definition
an area beneath the open-water zone where NO sunlight reaches
Term
ORGANISMS IN THE DEEP-WATER ZONE
Definition
catfish, worms, crustaceans, fungi, bacteria
Term
WETLAND
Definition
an area of land that is sometimes underwater or whose soil contains a great deal of moisture
Term
3 REASON WETLANDS ARE IMPORTANT
Definition
1-support many plants and animals
2-help with flood control
3-replenish underground water supplies
Term
MARSH
Definition
a treeless wetland ecosystem; you would find grasses, reeds, bulrushes, wild rice, muskrats, turtles, frogs, and birds
Term
SWAMP
Definition
a wetland ecosystem with trees and vines; you would find willows, poison ivy, orchids, water lilies, fish, snakes and birds
Term
ARCHIPELAGO
Definition
large group of islands
Term
GREATER ANTILLES
Definition
the four larger islands of the Caribbean islands Cuba, Jamaica, Hispaniola, and Puerto Rico
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