Part 5: Read the following passage and use no more than three words and/or a number to answer each of the following questions.. If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapor. In this manner,...
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Part 5: Read the following passage and use no more than three words and/or a number to answer each of the following questions..
If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation-conversion of liquid water to water vapor. In this manner, the salinity is increased, since the salt behind. If this is carried to the extreme, of course, white crystals of salt would be left behind. The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas of high rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by evaporation, or decreased by the addition of fresh water by precipitation or runoff. Normally, in tropical regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas. A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water. In the Weddell Sea, off Antarctica, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portions of the oceans of the world.
1. According to the passage, how does the salinity vary in different locations? ____________________________________________________________________
2. In which manner that the salinity is decreased?
____________________________________________________________________
3. According to the passage, the ocean generally has more salt in which kind of place?
____________________________________________________________________
4. How can we compare the salinity in coastal regions to other oceanic areas? ____________________________________________________________________
5. What will remain when seawater is frozen?
____________________________________________________________________
6. How does the ice affect the salinity when it melts?
____________________________________________________________________
Part 4: Fill in each blank in the passage with the correct word/phrase from the box. There are some extra words.
packed
satisfaction
able
introductory
capable
full
chosen
involve
Do you want to take part in the battle to save the world’s wildlife? Animal Watch is a book which will (1)_involve_______you in the fight for survival that faces many of our endangered animals and show how they struggle on the verge of extinction. As you enjoy the book’s 250 pages and over 150 color photographs, you will have the (2)satisfaction________ of knowing that part of your purchase money is being used to help animals survive. From the comfort of your armchair, you will be (3)_able_____to observe the world’s animals close-up and explore their habitats. You will also discover the terrible results of human greed for land, flesh and skins.
Animal Watch is (4)___packed______ with fascinating facts. Did you know that polar bear cover their black noses with their paws so that they can hunt their prey in the snow without being seen, for example? Or that for each orang-utan which is captured, one has to die.
This superb publication has so impressed Britain’s leading wildlife charity that is has been (5)__chosen______ as Book of the Year, a title awarded to books which are considered to have made a major contribution to wildlife conservation. You will find Animal Watchat a very low (6)__introductory______price at all good bookshops, but hurry while stocks last.