Questions 1-4
Complete the sentences below. Write ONE WORD ONLY for each answer.
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The salt content in marshes can be as high as that of the 1
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At different times of the day, there are changes in salinity and in the 2 and warmth of the water.
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Animals such as worms and shrimps feed on the 3 that grow in the marsh.
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Marshland in the US has been used in the past for 4 cultivation.
Questions 5-8
5The speaker says that one result of erecting artificial walls in salt marshes is that
A.
B.
C.
6Some people have complained about the building of dikes because
A.
B.
C.
7In the 20th century, a large proportion of marshes in America became
A.
B.
C.
8There are now laws which help to prevent
A.
B.
C.
Questions 9-10
Complete the notes below. Write NO MORE THAN TWO WORDS for each answer.
The Horseshoe Crab
- Related to: spider Most common food: 9
- Time of year when female lays eggs: 10