How many tons of gold does the world’s oceans still contain?

Experts estimate that tens of millions of tons of gold are still in the ocean. Experts confirm that 1 ton of ocean ore contains about 13 grams of gold, while on land, only 3 to 7 grams of gold per ton of ore.

1. Where is the latest named ocean? Icon Atlantic Icon Indian Ocean Icon southern Ocean The correct answer is answer C: The Southern Ocean is the newest ocean to be named. Previously, the Atlantic, Pacific and Indian Oceans were considered to extend as far as Antarctica, the name Southern Ocean did not exist. According to the National Ocean Service. The Southern Ocean is recognized by the US Organization of the US Board on Geographic Names as the water stretching from the Antarctic coast to the 60 degree south latitude line. The boundary of this ocean was proposed to the International Hydrological Organization (IHO) in 2000. This ocean name is widely recognized, however some organizations disagree. The Southern Ocean is 20.3 million square kilometers wide, equivalent to the area of ​​Russia and India combined. Coast stretches for nearly 18,000 km. The average depth is 4,000 – 5,000 m. The deepest point is in the South Sandwich Trench with a depth of 7,236 m. 2. Which ocean is the largest and the deepest? Icon Indian Ocean Icon Pacific Icon Atlantic The Pacific Ocean is the largest and deepest ocean on Earth. With an area of ​​165.25 million km2, this ocean accounts for one third of the total surface area of ​​the globe. All the land on Earth combined (about 150 million square kilometers) still cannot cover the surface of this ocean. The Pacific Ocean stretches from the Arctic Ocean in the north to the Antarctic continent in the south. The widest east-west width is 19,800 km, separating Asia, Oceania from the Americas. The Pacific Ocean has an average depth of 4,280 m. The deepest point of the ocean lies in the Mariana Trench, 10,911 m deep. This is also the deepest point of the Earth’s crust, 13 times the height of the Burj Khalifa – the tallest building in the world in Dubai. If Everest could be placed on the bottom of the Mariana Trench, the world’s highest mountain would still lie underneath the Pacific Ocean. 3. Which ocean is the smallest? Icon southern Ocean Icon Atlantic Icon Arctic Ocean The correct answer is answer C: According to the National Ocean Service, the Arctic Ocean is the smallest ocean on Earth with an area of ​​nearly 14.1 million square kilometers. Even the smallest, it is still nearly 1.5 times larger than the US. The Arctic Ocean borders the United States (the Alaska region), Russia, Canada, Norway and Denmark (the Greenland region). The average depth of this ocean is about 1,205 m, the deepest point is 5,567 m. The Arctic Ocean is almost completely covered by ice most of the year. However, this ocean is not barren. When the ice melts, organisms and nutrients are released into the water. This promotes the growth of algae under the ice. These algae provide food for small organisms, zooplankton, and are a source of food for fish, squid, seals and whales. Some of these larger creatures become prey to polar bears. When the organisms under the ice die, they sink to the ocean floor and feed sponges, anemones and other bottom organisms. 4. Is the Atlantic Ocean larger than the Indian Ocean, right or wrong? Icon It’s correct Icon Wrong The correct answer is answer A: Kindy Data already has a comparison showing that the Atlantic Ocean has an area larger than the Indian Ocean. The Atlantic Ocean is 106.5 million square kilometers wide, covering 20.8 percent of the Earth’s total surface. The average depth is 3,646 m. The deepest point is in the Puerto Rico Trench, at 8,486 m deep. It is surrounded by America to the west, Europe and Africa to the east. The width from east to west is about 9,600 km. Meanwhile, the Indian Ocean is 70.56 million square kilometers wide, covering 13.8 percent of the Earth’s surface. The average depth is 3,963 m. The deepest place is Diamantina trench, 8047 m deep. To the north, this ocean is limited by peninsulas India, Pakistan and Iran, east by Southeast Asia (namely Myanmar, Thailand, Malaysia, Indonesia) and Oceania, to the west by Arab and African islands. The Indian Ocean opens in the south and is bordered by the Southern Ice Ocean. 5. How many tons of gold does the world’s oceans contain? Icon 10 million Icon 20 million Icon 30 millions The correct answer is answer B: Experts estimate that about 20 million tons of gold are still in the ocean. Experts confirm that 1 ton of ocean ore contains about 13 grams of gold, while on land, only 3 to 7 grams of gold per ton of ore. 6. In which sea area is volcanic activity concentrated? Icon South Pacific Icon Indian Ocean Icon Atlantic The correct answer is Answer A: 90% of all volcanic activity on earth is concentrated in the ocean with the largest concentration in the South Pacific. 7. What is the freezing temperature of the oceans about Celsius? Icon -10 degrees C Icon -5 ° C Icon -1.8 degrees C The correct answer is Answer C: Seawater freezes around −1.8 ° C (28.8 ° F). When the temperature of the water drops low enough, ice crystals form on the surface. 8. Which ocean contains the highest salt content in the world? Icon Pacific Icon Atlantic Icon Indian Ocean The correct answer is answer B: Which ocean is the most salty in the world? that is the Atlantic Ocean. In this barn, the average salinity is about 37.9 o / oo. In the Sargasso Sea in the North Atlantic Ocean is the region with the greatest salinity. The reason is that the temperature here is quite high and located far from the mainland, so it does not receive water from rivers and streams. The lightest seawater belongs to the Arctic and Antarctic regions. This is understandable, these are 2 areas with low temperature and continuous rainfall and ice melting. Result Please work harder! point