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Coral Reefs and Extreme flooding

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Summer Exam (Geography) Flashcards on Coral Reefs and Extreme flooding , created by HRYN red on 05/11/2017.
HRYN red
Flashcards by HRYN red, updated more than 1 year ago
HRYN red
Created by HRYN red over 5 years ago
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Question Answer
where are the coral reefs around in the world mostly around the equator where its warm
describe and explain the conditions that corals need to grow in. warm, shallow, clear water, saltwater, lots of sunlight. cant live in non saltwater, need sunlight to grow, clear water so can get sunlight, shallow water so nothing grows above it and so its closer to sunlight, and warm water so the zoozanthelie stay so no coral bleaching.
what are the 3 types of coral reefs? fringing reef Barrier Reef Aroll
what is a fringing reef? fringe reefs grow close to the shore line. it can be attached to the shore or there may be a narrow strip of water called a lagoon or channel between the land and the coral reef.
what is a Barrier reef? barrier reefs grow further from the shore line, sometimes several miles from the shore.
what is an Atoll? an atoll is a ring of coral surrounding a lagoon of water. It starts out as a fringe reef around a volcanic island or mountain. As the coral grows up. the island sinks in to the ocean and just the ring of coral is left. some atolls are so big that people live on them. an example of this is the Maldives.
what are the uses of coral reefs? give oxygen to fish so we can eat attracts tourists creates homes for underwater life helps create sand protects land from stormy weather carbon absoration- reduces global warming algee creates food for underwater life.
what are the threats facing coral reefs? tourist touching coral, cruise ships dropping anchors on it, coral bleaching, oil spills, global warming, pollution, murky water, fresh water overflow, climate change, too much plankton, over grown seaweed
how can coral reefs be managed sustainably? use last card about threats facing coral reefs. (3) 1. recycle so garbage dosnt get dumpped in sea 2. get tourist to wear gloves so no skin contact. 3. cruise ships should have an exact place to drop anchor that has no coral
define a hazard something causing danger or risk...
what is an example of a human hazard? can do more than 1 global warming deforastation necular war pollution...
what is an example of natural hazard? can do more than one. earthquakes tropical storm storms tornados sanami volcano mudslide...
what is the drainage basin of a river? using key works whole cycle. a river begins at its source which then flows down its channel. the channle has river banks and a river bed. tributaries then connect and join the main river until it reaches the end called the mouth before entering a sea or lake. kuring that a drainage basin is a land where rain clooects and the water shed is the edge of a river basin (all of this), usally high of the ground.
how does rainfall reach a river? after rain is pored: if the ground is hard or very wet the rainfall runs along it called surface runoff. other wise the rain soaks ito the ground called infitration. some of the water soaked in the ground runs side ways through the soil called throughflow. the other water in the ground soaks down filling rock cracks called ground water. then the ground water is always on the move.
why do floods happen? physical reasons. (max 5) 1.some areas have impermeable rock so the water cant soak into the ground.2.rain will run down steep slopes quickly before it has time to soak into the ground.3.heavy rain to cause too much water.4.if the soil is already wet so when more comes it cant soak.5.the more tributaries there are the more chance of flooding because of the extra water.
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