Science Homework Help

In this class activity, you will watch the documentary called “Chasing Coral“. Due to the copyright issue, we cannot show this movie on ZOOM. You can watch this documentary on Netflix. You may also find the documentary on Youtube, such as this link: https://www.youtube.com/watch?v=aGGBGcjdjXA&list=PLlHeCj2Iy5D9fGJGEtJxDx3wPkz6foRNj&index=48 (Links to an external site.)

But there is a possibility that youtube link could be removed.

Questions:

1. According to the documentary, how many corals have been lost in the last 30 to 50 years in Florida?
(A) 10%, (B) 30%, (C) 50%, (D) 80% – 90%

2. How many corals have been lost in the last 30 years in the entire world?
(A) 10%, (B) 30%, (C) 50%, (D) 90%

3. What is a coral? Is the following description correct:

(True or False): Coral is an animal with a lot of polyps. Polyps are parts of the coral.

4. True or false: Inside the corals, there are microalgae, which goes through photosynthesis process and produce food for the corals.

5. Why are the corals turning white in different parts of the world?

(A) Too much light, (B) Not enough food, (C) Temperature is warmer by 2 degree Celsius, (D) It is part of their natural cycle.
This is known as the “coral bleaching”.

6. In 1997 and 1998, when the first global-scale mass-bleaching happened, what was the ocean temperature like?

7. Is the global-scale bleaching event happening faster, slower, or having the same frequency?

8. Which are the three places that they put camera down for time elapse photos?
(A) Hawaii, (B) Bermuda, (C) Bahamas, (D) Costa Rica, (E) Australia

9. What does coral core show us?
(A) The rate that the coral is growing every year,
(B) When the mass bleaching occurred,
(C) Both of A and B.

10. When Earth’s atmosphere traps the outgoing heat, how much is absorbed by the ocean?
(A) 10%, (B) 30%, (C) 50%, (D) 93%

11. If the ocean is not absorbing this much heat, what surface temperature would we have?
(A) 58 °F, (B) 73 °F, (C) 100 °F, (D) 122 °F