MOST DANGEROUS LIZARS

  MOST DANGEROUS LIZARS Lizards are a diverse group of reptiles that belong to the order Squamata, which also includes snakes. They have scaly skin, four legs (except for some legless species), movable eyelids, and external ear openings. They are mostly carnivorous and have various adaptations to avoid predators, such as venom, camouflage, and tail regeneration. There are more than 7,000 species of lizards in the world, living in different habitats and climates. Some of the most well-known lizards are the Komodo dragon, the chameleon, the gecko, and the iguana. Lizards are not dangerous to humans, however, some lizards are poisonous and can harm a person if they are touched or bitten by these reptiles. Certain lizards, such as the Komodo dragon, can grow to large sizes and have been known to attack and kill people. Most lizards, in reality, are harmless to humans, as are most turtles; however, there are certain members of both groups that can kill, maim, make ill, or inflict at lea
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QUIZ ON POLLUTION


QUIZ ON POLLUTION


1.    The following pollutant is not contained in the vehicular exhaust emissions..
(a)       Lead
<img src="http://udinikkara.blogspot.com/image.png" alt="ammonia" … />
(b)       Ammonia
(c)       Carbon monoxide
(d)       Particulate matter

2.    Bhopal gas tragedy struck in the year 1984 due to the leakage of the following gas..
(a)       Methyl-iso-cyanate
(b)       Nitrous oxide
(c)       Methane
(d)       Carbon monoxide

3.    How much of the world’s water is available for human sue?.
(a)       97%
(b)       23%
(c)       3%
(d)       Less than 1%

4.    According to the World Health Organization, what is the most polluted city in the world?.
(a)       Los Angeles, U.S.A
(b)       Mexico city, Mexico
(c)       New Delhi, India
(d)       Shanghai, China

 5.    As the global warming continues, the intensity of what type of storm that hits coastlines is predicted to increase?
(a)       Tornadoes
(b)       Hurricanes
(c)       Tsunamis
(d)       Twists

6.    Which country emits the most carbon dioxide?.
(a)       China
(b)       U.S.A
(c)       Russia
(d)       India

7.    As carbon dioxide emissions increase, the ocean’s ability to absorb carbon dioxide declines, resulting in a more acidic ocean.What species is the most at risk in acidic water?.
(a)       Coral
(b)       Plankton
<img src="http://udinikkara.blogspot.com/image.png" alt="coral" … />

(c)       Fish
(d)       Whales

8.    What is the harm from the depletion of earth’s ozone layer ?
(a)       The average temperature of earth’s surface will increase gradually
(b)       The oxygen content of the atmosphere will decrease
(c)       Increased amount of ultraviolet radiation will reach earth’s surface
(d)       Sea levels will rise as the polar ice caps will gradually melt

9.    Acid rain is formed due to contribution from the following pair of gases..
(a)       Methane and ozone
(b)       Oxygen and nitrous oxide
(c)       Methane and sulpher dioxide
(d)       Carbon dioxide and sulpher dioxide

10. The presence of high coli form counts in water indicates-------------.
(a)       Contamination by human wastes
(b)       Phosphorus contamination
(c)       Decreased biological oxygen demand
(d)       Hydrocarbon contamination


ANSWERS
1. (b)   Ammonia
2.  (a)  Methyl-iso-cyanate
3. (d)   Less than 1%
4. (b)   Mexico city, Mexico
5. (b)   Hurricanes
6. (b)   U.S.A
7. (a)   Coral
8. (c)   Increased amount of ultraviolet radiation will reach earth’s surface
9. (b)   Oxygen and nitrous oxide
10. (a) Contamination by human wastes






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