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This passage delves into the phenomenon of coral bleaching in the Great Barrier Reef. It explains how rising water temperatures stress corals, causing them to expel their symbiotic algae. The text describes the visible effects of bleaching - the coral turning white - and the dire consequences if conditions don't improve quickly. It highlights recent major bleaching events and their widespread impact on the reef. The passage underscores coral bleaching as one of the most significant threats to the Great Barrier Reef's future. Keywords: coral bleaching, Great Barrier Reef, climate change, marine ecosystem, symbiotic algae, coral death, ocean warming, environmental stress, reef conservation, marine biology.
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Coral bleaching is a big problem for the Great Barrier Reef. It happens when corals get stressed, usually because the water is too warm. Corals have tiny algae living inside them that give them their bright colors and provide them with food. When corals are stressed, they push out these algae. This makes the corals turn white or "bleached." Bleached corals aren't dead, but they are in danger. Without their algae, corals don't get enough food and can starve. If the water doesn't cool down quickly, the bleached corals might die.
In recent years, the Great Barrier Reef has experienced several major bleaching events. These events have affected large parts of the reef, causing some areas to die. Coral bleaching is one of the biggest threats to the future of the Great Barrier Reef.
What usually causes coral bleaching?
Water that is too coldWater that is too warmToo much sunlightNot enough salt in the water
What gives corals their bright colors?
Special rocksTiny fishTiny algaeUnderwater lights
What happens when corals are bleached?
They turn bright redThey grow biggerThey turn whiteThey sink to the bottom of the ocean
What do the algae provide to the corals?
Protection from predatorsFoodAbility to floatAbility to glow in the dark
What happens to bleached corals if the water doesn't cool down quickly?
They might dieThey grow back strongerThey change colorThey move to a new location
According to the passage, how serious is the threat of coral bleaching to the Great Barrier Reef?
It's a minor problemIt's one of the biggest threatsIt's not a threat at allIt only affects a small part of the reef
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