47. The Deepest Place on Earth: The Mariana Trench

According to the essay, where is the Mariana Trench located?
1. In the eastern Atlantic Ocean.
2. Near the Mariana Islands in the western Pacific Ocean.
3. At the center of the Philippine Sea.
4. South of the Hawaiian Islands.
The author uses the example of Mount Everest to illustrate what point about the Challenger Deep?
1. The trench is colder than the tallest mountain.
2. The trench is a more difficult place to explore than the mountain.
3. The trench is incredibly deep.
4. The trench was formed by the same geological forces as the mountain.
What are the two main challenges for life in the Mariana Trench, as described in the essay?
1. Freezing temperatures and powerful currents.
2. Acidic water and a lack of oxygen.
3. Total darkness and immense pressure.
4. Volcanic activity and toxic chemicals.
How do most organisms in the trench get their food, since there is no sunlight?
1. They rely on food that sinks from the upper ocean or use chemicals from volcanic vents.
2. They use bioluminescence to attract and hunt larger fish.
3. They travel to the ocean's surface at night to feed.
4. They perform photosynthesis using heat from thermal vents.
The essay suggests that the discovery of life in the Mariana Trench is significant because it demonstrates
1. the need for more advanced submarines to explore the ocean floor
2. the abundance of natural resources in deep-sea environments.
3. the resilience and adaptability of life in extreme conditions.
4. the dangers of pollution reaching the deepest parts of the ocean.