Uploaded by anushka sharma

DDT worksheet

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A Danger of Using Chemical Pesticides
A Danger of Using Chemical Pesticides
The pesticide makes
only a weak solution
in the water, but
microscopic plants
take it up.
The pesticide makes
only a weak solution
in the water, but
microscopic plants
take it up.
Each microscopic
animal eats many
microscopic plants.
Each microscopic
animal eats many
microscopic plants.
Each small fish eats
many microscopic
animals.
Each small fish eats
many microscopic
animals.
Each large fish eats
several small fish.
Each large fish eats
several small fish.
The grebe eats
several large fish.
The grebe eats
several large fish.
1.
The boxes on the left-hand side show the concentration
of pesticide in the tissues of the different organisms.
Complete the rest of the boxes.
1.
The boxes on the left-hand side show the concentration
of pesticide in the tissues of the different organisms.
Complete the rest of the boxes.
2.
How does the pesticide get into the water?
2.
How does the pesticide get into the water?
3.
The small fish are not affected by the pesticide but the
grebe will die from it. Why?
3.
The small fish are not affected by the pesticide but the
grebe will die from it. Why?
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