phonghann1925 4/16/2024 6:46:02 AM

        Whales have been being hunted for hundreds of years with numbers reaching an all-time low in the 1930s when over 50,000 were killed each year. While conservation efforts and bans on whaling have helped, the gentle sea giants still face dangers such as ship strikes, fishing nets and the overall increase in ocean temperatures. Whale biologists think that only a fourth of the planet’s population remains today, with blue whales at as little as 3% of their previous numbers.

        Restoring these incredible sea mammals to their pre-whaling numbers could prove vital to reversing climate change. Scientists at the International Monetary Fund (IMF) have calculated the value of a whale at $$$$2 million each due to the important role they have in reducing the amount of CO2 in our atmosphere. Throughout their life, the animals accumulate carbon in their bodies and then sink to the bottom of the ocean. A great whale, for example, can take nearly 30000kg of CO2 out of the atmosphere for centuries compared to the around 15kg captured by a tree each year.

        It’s not just what they store in their bodies, however. In a unique system that no other animal can reproduce, the waste that whales produce is brought to the surface by their vertical movement and feeds organisms called phytoplankton, which are tiny organisms that capture 40% of COproduced and generate 50% of all oxygen. And restoring the number of whales to around 5 million would significantly increase phytoplankton numbers (even a 1% increase in phytoplankton would capture millions of tonnes of additional CO). Whale conservation, therefore, can be a vital tool in battling our increasing carbon emissions.

 (Adapted from readtoolead.com)

Question 9: What is the passage mainly about?

                A. Measures taken to prevent whale hunting            

                B. How saving whales can help the environment 

                C. Why whales produce so much oxygen     

                D. The link between whales and phytoplanktons

Question 10: The word “captured” in paragraph 1 can be best replaced by ___________.

                A. arrested            B. maintained           C. immersed           D. absorbed

Question 11: IMF scientists calculated a whale’s value based on __________.

                A. how much oxygen they release into the atmosphere every year        

                B. the amount of carbon they store in their bodies during lifetime

                C. the important role they play in changing the world’s climate           

                D. their significance in the reduction of CO2 in our atmosphere

Question 12: Which of the following is TRUE, according to the passage?

                A. Whales can only live healthily if ocean temperatures are at very low levels.

                B. Nowadays, only 25 per cent of the planet’s blue whale population remains.

                C. A great whale takes much more CO2 out of the atmosphere than a tree does.

                D. A rise in the number of phytoplanktons will help restore whale populations.

Question 13: The word “they” in paragraph 3 refers to __________.

                A. whales                  B. changes                C. amounts                D. centuries

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