geog coasts

Cards (48)

  • what does coral get from algae?
    oxygen
  • what does algae get from coral?
    sunlight
  • which part of coral resembles sacs?
    polyps bodies
  • what part of polyps sting predators?
    mouth
  • purpose of polyps mouths?

    stinging predators
  • what are polyps tentacles for?

    feeding at night
  • why must water be clear for coral?

    sediment or objects block from sunlight
  • best temp water for corals?
    20 - 32
  • what temperature can corals survive
    90
  • how deep down do corals thrive
    5 - 10 m
  • how do coral create an exoskeleton
    limestone calcium carbonate
  • why arent coral found near river mouths
    need saltwater
  • what type of water do corals thrive in

    saltwater
  • what relationship do corals and algae have

    symbiotic
  • can you regenerate coral reefs
    no
  • problems with coral reef
    divers break, speedboats churn, fishermen poison, coral bleaching
  • benefits of coral

    tourism and fishing are good for the economy
  • purpose of mangrove swamps?
    protect coastlines in storms, shelter endangered species, filter water to prevent pollution
  • do mangrove swamps need competition
    no
  • what type of water for mangrove swamps
    sub / tropical
  • can mangrove swamps thrive in deep waters
    no, coastlines only
  • minimum temp for mangrove swamps
    19
  • do mangrove swamps need clean or muddy water
    muddy
  • why do mangrove swamps need muddy waters
    grow through roots
  • how are cliffs formed
    erosion
  • what type of rock creates steep cliffs?
    resistant hard rock
  • what type of rock creates gentle sloping cliffs
    unresistant soft rock
  • name 4 types of beaches
    mud shingle pebble sand
  • cross section of a beach?
    profile
  • is sediment smaller or larger down the beach?
    smaller
  • is sediment smaller or larger up the beach?
    larger
  • what occurs behind a spit
    salt marsh
  • what happens when wind direction changes at a spit
    hook
  • what lives in saltmarshes
    endangered protected animals
  • whats a tombolo
    spit connects an island and mainland
  • 3 things affecting waves strength
    wind strength, how long wind has been blowing, distance/fetch wave is travelling
  • which waves are more powerful
    destructive
  • which waves are less powerful
    constructive
  • which waves cause deposition
    constructive
  • which waves cause erosion
    destructive