Flock X Flock Y
Flock Z
Total Pieces of Food Eaten
(from previous page)
147
93
60
Food Percentage*
%
%
%
Simulated Number of Birds in Flock for 3rd Generation**
Divide each flock's total pieces of food by 300, the total number of pieces of food eaten.
** Multiply the food percentage for each flock by the total number of birds (30)

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humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.