Directions: Read the passage carefully and answer the questions that follow.
The Great Barrier Reef is one of the world's most iconic natural wonders. Located off the coast of Queensland, Australia, it stretches over 2,300 kilometers and covers an area of approximately 344,400 square kilometers. The reef is composed of over 2,900 individual coral reefs and is home to a rich diversity of marine life.
The Great Barrier Reef is renowned for its vibrant coral formations. Corals are tiny animals that secrete calcium carbonate, forming the intricate structures known as coral reefs. These reefs provide shelter and a breeding ground for a wide range of marine species, including fish, turtles, and dolphins. The reef's vibrant colors and intricate patterns make it a popular destination for snorkeling and scuba diving enthusiasts.
However, the Great Barrier Reef is facing significant challenges. Climate change has led to rising ocean temperatures, causing coral bleaching events. When corals are stressed by high temperatures, they expel the colorful algae living within their tissues, turning them white or pale. If the stress continues for too long, the corals die. In recent years, the frequency and severity of coral bleaching events have increased, threatening the survival of the reef.
The decline of the Great Barrier Reef would have far-reaching consequences. Apart from being a natural wonder, the reef supports local economies through tourism and fishing industries. It also plays a crucial role in maintaining the balance of marine ecosystems, providing a habitat for numerous species. Efforts are being made to protect and preserve the reef, including reducing greenhouse gas emissions and implementing sustainable fishing practices.
Question for Practice Test: Reading Comprehension - 17
Try yourself:What is coral bleaching?
Explanation
The passage explains that coral bleaching occurs when corals expel the colorful algae living within their tissues, turning them white or pale.
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Question for Practice Test: Reading Comprehension - 17
Try yourself:Why is the decline of the Great Barrier Reef concerning?
Explanation
The passage mentions that the decline of the Great Barrier Reef would have far-reaching consequences, including threatening the survival of marine species, impacting local economies dependent on tourism and fishing, and disrupting the balance of marine ecosystems.
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Question for Practice Test: Reading Comprehension - 17
Try yourself:What efforts are being made to protect the Great Barrier Reef?
Explanation
The passage states that efforts are being made to protect and preserve the reef, including reducing greenhouse gas emissions and implementing sustainable fishing practices.
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Question for Practice Test: Reading Comprehension - 17
Try yourself:What is the main subject of the passage?
Explanation
The main subject of the passage is the Great Barrier Reef. It is introduced in the first sentence as one of the world's most iconic natural wonders.
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Question for Practice Test: Reading Comprehension - 17
Try yourself:What are corals?
Explanation
The passage states that corals are tiny animals that secrete calcium carbonate, forming the intricate structures known as coral reefs.
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