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Ocean Floor and Shore Zones
Mrs. Weber's science test preparation
30
Science
7th Grade
04/04/2006

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Cards

Term
Formation of shore zones
Definition
waves shift sand on shores, shores constantly change
Term
Long Shore Currents
Definition
Flow of water that runs close to the shore and parallel to it
Term
Groyne
Definition
natural land or human made projection from land into water that prevents the beach from washing away
Term
Updrift vs Downdrift of groyne
Definition
updrift enlarges a beach, downdrift moves sediment away
Term
Effect of waves on shoreline
Definition
shifts sands on shores
Term
Effect of waves on steep shore zone
Definition
carries sediment away
Term
Flat shore zone
Definition
a sandy beach
Term
Beach composition
Definition
materials in sand tells you where the beach is because the mixture is unique to that beach
Term
Human affect on shore zones
Definition
people pollute with trash, sewage, and chemicals
Term
Pollution
Definition
substances produced by human activities that are harmful to the environment
Term
Examples of shore zone pollution
Definition
oil spills, garbage, sewage, other chemicals
Term
How to reduce pollution
Definition
laws,education, and cleaning up
Term
Oil spills
Definition
occur when a tanker gets a leak, usually with a crash, oil wells leak
Term
Danger of oil spills
Definition
kills ocean life forms like birds and fish; they suffocate
Term
How to clean up oil spills
Definition
booms are used to contain them and collect the oil
Term
How are habitats destroyed?
Definition
pollution kills fish and birds, houses and industry get built
Term
Reduction of zone pollution
Definition
clean up trash, don't have bon fires, limit building
Term
Ocean floor exploration methods
Definition
Alvin-remote submarine (1970)

Nemo-plexiglass semi-submarine (1980)

Sonar, sound waves bounced off the ocean floor (90's to now)

Term
Determining shape of ocean floor
Definition
measuring depth in lots of places
Term
Sonar
Definition
uses sound waves under water to measure distance
Term
Ocean floor features
Definition
continental shelf

continental slope

abyssal plain

trenches

rift zone

mid-ocean ridges

Term
Continental shelf
Definition
part of ocean floor nearest landmass
Term
Continental slope
Definition
steep slope from continental shelf to abyssal plain
Term
Abyssal plain
Definition
largest amound of area on ocean floo--flat
Term
Trench
Definition
where plates converge--creates a long narrow valley
Term
Rift Zone
Definition
where magma oozes onto the ocean floor
Term
Mid-Ocean ridges
Definition
alongside rift zones--underwater mountains
Term
Indirect Evidence
Definition
not measured directly by a person
Term
Why we use indirect evidence
Definition
humans can't go deep enough into the ocean to measure because of the pressure
Term
Effects of building on shore zones
Definition
causes erosion and humans pollute, disrupts habitats
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