Marine Science Tides
Deep ocean mysteries and wonders
- At the time this video was filmed (2007), what was Gallo’s estimate of the percentage of earth’s oceans that had been investigated? How might this impact not only how we view the oceans, tides, and the entire marine ecosystem, but also the world and climate in general? Gallo thinks that only 5% had been explored as of 2007. I think back then knowing this information would have everyone view the ocean completely differently. Mainly because that would mean we hardly know anything about the marine life. If we have only explored 5% of this life then there must still be so many unknowns.
- Just as the unit describes many amazing ecosystem creatures, Gallo also shares some incredible species that were observed at the bottom of the ocean. Briefly describe several of the creatures or discoveries discussed and what makes them so interesting. He was able to find “Jellies” he found these very interesting since they are so small and they look like mini lobsters. Another thing he was able to discover was the “poisonous water” “because it's so deep it would crush the Titanic” this is really important for us to know since this could lead to many missing ships. Lastly Gallo was very found of the Vampyroteuthis infernalis. This is also known as the vampire squid. They are known for covering themselves with a black cape when they feel unsafe.
The secrets I find on the mysterious ocean floor
- Briefly describe what Robinson and her colleagues are trying to understand. Why does she think the ocean has a lot to do with this? They are trying to figure out how we moved from a very cold climate condition to the warm one we experience today. The main reason why she thinks the ocean is in charge of this is because the ocean stores about 60x more carbon than the atmosphere. Because of this is will allow heat to transport from one place to another.
- Robinson illustrates how she and her team are using corals to learn more about the ocean’s composition long ago. Briefly summarize what Robinson details about ancient ocean feedbacks. She has been able to discover the amount of power the ocean currents have. They are so powerful that they are able to push these corals far away from its original place. Not only that but corals need food and water to survive so clearly they would go back and fourth when not supplied with enough of each. “We've collected corals from back and forth across this Antarctic passage, and we've found quite a surprising thing from my uranium dating: the corals migrated from south to north during this transition from the glacial to the interglacial. We don't really know why, but we think it's something to do with the food source and maybe the oxygen in the water.” This is her talking about how the corals are able to survive.
- The unit discusses primary and secondary succession. What are primary and secondary successions? How does primary or secondary succession relate to this video? A primary succession occurs in a lifeless area, it means anything in the area is incapable of sustaining any kind of life. Comparing to a secondary succession where the initial conditions of an area are very harsh. It relates to the video regarding the coral. Robinson talks about how the coral was unable to live in certain areas of the sea and moved over to a more harsh area.
- What did you find to be the most astonishing or interesting thing Robinson discovered on the deep ocean floor? Why? The coral garden was the more interesting thing she mentioned. They where able to find this nearly a couple thousands deep and there are new unknown species down there.
Cash Course Astronomy
- What is gravity? What is the tidal force and how does it relate to gravity? Gravity is a force and it gets weaker with distance. Tidal force is acting on the astronomical body. It produces a gravitational attraction from one object to another.
- How does tidal force affect the water and beaches on Earth? If there's a beach on one of those spots, the water will cover it and we say, it's high tide. If a beach is where the tidal force is low, the water's been pulled away from it, and it's low tide. This means that the beach would mostly be covered in water.
- What is tidal locking and how are the moon and earth tidally locked? Tidal locking is when the orbital period matches its rotational period. The moon and the Earth are locked when the are facing each other at the same time.
- What happens during a new moon and how does it affect tides? What is it called? At New Moon and Full Moon the gravitational force of the Sun and the Moon act together and create spring tides.