The Greenland shark can be found in a. the Pacific and Atlantic oceans b. the Atlantic and Arctic oceans c. the Atlantic and Indian oceans
Scientists estimated the lifespan of Greenland sharks by carbon dating tissues in their a. eyes b. mouths c. flesh
The population of Greenland sharks is decreasing because of a. predators b. disease c. human activity
Discussion/essay questions
What do you think should be done to protect life in the oceans?
Transcript
The Greenland shark is a type of shark that lives in the Atlantic and Arctic oceans. Greenland sharks are known for their long lifespans, which scientists estimate to be between 200 and 500 years. These estimates come from carbon dating of tissues in the sharks’ eyes. This makes Greenland sharks the longest-living vertebrates in the world. They are also one of the largest types of fish in the ocean, growing up to 21 feet long. However, they are difficult to find. Greenland sharks prefer very deep, cold water, which means that they rarely interact with humans. Still, the population of Greenland sharks is decreasing because of human activity. Because they grow very slowly, Greenland sharks may take an entire century to reach reproductive maturity. This means that they can’t repopulate quickly. They are currently considered a near threatened species.
The sinking of the Titanic has inspired many books, movies, and conspiracy theories. Why do you think people are still so fascinated by this event?
Transcript
The Titanic was a British passenger ship that sank to the bottom of the ocean during its first voyage. The ship was constructed during the 1900s by a transportation company known as White Star. This was a part of their plan to introduce a new set of luxury passenger ships that would transport wealthy people across the Atlantic Ocean. White Star finished building the Titanic in 1911. At that time, it was the biggest ship that had ever been built. The Titanic was designed with safety compartments that could fill up with water if any issues occurred. Because of this, many people believed that the Titanic was unsinkable. In April 1912, the Titanic began its trip from England to the United States, carrying over 2,000 passengers. While at sea, the ship collided with an iceberg and began to overflow. Passengers and crew evacuated the ship, but there were not enough lifeboats on board to save everyone. Out of the original 2,000 passengers, only 705 survived. The sinking of the Titanic has since been known as one of the greatest tragedies of the 20th century.
