Question

 

X)-Fill in each blank with ONE suitable word.
El Nino and La Nina
The tropical Pacific Ocean (1)______________ a warming and cooling cycle. This cycle is a completely natural event and usually (2)___________ between three to seven years.
When the waters become (3)______________, it is called El Nino, and when they become cooler it is called La Nina. During the cycle, the (4)___________ of the ocean can change by around 3^oC between the warmest and coolest times.
(5)_____________ off the South American coast have known about this
(6)____________ event for hundreds of years. When it (7)____________, they see a huge fall in the numbers of fish caught. But scientists are only just beginning to
(8)____________ how the event affects Earth’s weather and climate.

Answer 1

1. has

2. lasts

3. warmer

4. temperature

5. people

6. natural

7. happens

8. understand