passage 19 5/5

Passage 19

 Surprisingly, if a fish swimming in the ocean wants to be invisible to predators, the clever colour to be is not sea blue – it’s red. In a mathematical model of how light travels through a tropical ocean, Sonke Johsnen of University in North Carolina has shown that red light scatters most evenly in the ocean at depths than 20 metres. So although fish nearest the surface are hard to spot from above if they’re blue, any swimming deeper than 20 metres are less likely to be seen by predators if they are red (proceedings of the Royal Society B, DOI 10.1098/rspb.2001.1855).

 Johnsen says the finding makes sense when you look at marine creatures: ‘there are really blue animals near the surface-think of a tuna-then redder animals like shrimp further down.’

Question

1. To “spot” (line 5) means most nearly the same as…….. .
a. to catch   b. to see             
c. to grab     d. to fish

2. In order not to be seen by predators, fish living deeper than 20 metres in the sea ……… .
a. must hide behind rocks   b. must be invisible
c. must be sea blue    d. must to red

3. The main idea of the story is that ……… .
a. a fish swimming in the ocean must look out for predators.
b. red light scatters most evenly in the ocean.
c. redder animals like shrimp live deep.
d. in the deep, fish have to be red – or dead.

4. Most marine creatures living near the surface of the ocean are …………. .
a. red               b. white               c. blue               d. silver 

5. According to ……… , red light scatters most evenly in the ocean at depts. Greater than 20 metres.
a. Duke University    b. Proceeding of the Royal Society
c. a mathermatical model   d. most biologists

Answer

1.b  2.d  3.d  4.c  5.c

นางสาวบัณฑิตา บุญหอม เลขที่ 19 ชั้น ม.5/5