PPT Chapter 1 - Where does it Come from? Class 6 Notes | EduRev

Science Class 6

Created by: Praveen Kumar

Class 6 : PPT Chapter 1 - Where does it Come from? Class 6 Notes | EduRev

 Page 1


 
 
Where does our food come 
from? 
• Croplands (mostly grain) – provide 77% 
of the world’s food 
• Rangelands (meat) supply 16% 
• Oceanic fisheries (fish and shellfish) – 
7% 
Page 2


 
 
Where does our food come 
from? 
• Croplands (mostly grain) – provide 77% 
of the world’s food 
• Rangelands (meat) supply 16% 
• Oceanic fisheries (fish and shellfish) – 
7% 
 
 
How Is Food Produced? 
• Sources of food 
• Primary plants: Wheat, corn, and rice 
• Primary animals: 
fish, beef, pork, and chicken 
 
• 14 plant and 8 animal species provide 
90% of the global food calories 
 
Page 3


 
 
Where does our food come 
from? 
• Croplands (mostly grain) – provide 77% 
of the world’s food 
• Rangelands (meat) supply 16% 
• Oceanic fisheries (fish and shellfish) – 
7% 
 
 
How Is Food Produced? 
• Sources of food 
• Primary plants: Wheat, corn, and rice 
• Primary animals: 
fish, beef, pork, and chicken 
 
• 14 plant and 8 animal species provide 
90% of the global food calories 
 
 
 
Major Types of Agriculture 
• Industrialized agriculture 
• Large amounts of fossil fuel, water, fertilizer, and 
pesticides to produce monoculture crops or livestock 
animals 
• Plantation 
• Form of industrialized agriculture – single ownership 
• Traditional subsistence agriculture  
– Produce only enough for the family 
• Traditional intensive agriculture 
– Increase outputs for profit 
Page 4


 
 
Where does our food come 
from? 
• Croplands (mostly grain) – provide 77% 
of the world’s food 
• Rangelands (meat) supply 16% 
• Oceanic fisheries (fish and shellfish) – 
7% 
 
 
How Is Food Produced? 
• Sources of food 
• Primary plants: Wheat, corn, and rice 
• Primary animals: 
fish, beef, pork, and chicken 
 
• 14 plant and 8 animal species provide 
90% of the global food calories 
 
 
 
Major Types of Agriculture 
• Industrialized agriculture 
• Large amounts of fossil fuel, water, fertilizer, and 
pesticides to produce monoculture crops or livestock 
animals 
• Plantation 
• Form of industrialized agriculture – single ownership 
• Traditional subsistence agriculture  
– Produce only enough for the family 
• Traditional intensive agriculture 
– Increase outputs for profit 
 
 
Industrialized Agricultural 
Wastes and Land Pollution 
• Animal Confinement 
– Waste runoff 
• Overgrazing 
– Increases soil erosion 
• Sedimentation 
• Nutrient application 
• Irrigation  
• Pesticides 
Page 5


 
 
Where does our food come 
from? 
• Croplands (mostly grain) – provide 77% 
of the world’s food 
• Rangelands (meat) supply 16% 
• Oceanic fisheries (fish and shellfish) – 
7% 
 
 
How Is Food Produced? 
• Sources of food 
• Primary plants: Wheat, corn, and rice 
• Primary animals: 
fish, beef, pork, and chicken 
 
• 14 plant and 8 animal species provide 
90% of the global food calories 
 
 
 
Major Types of Agriculture 
• Industrialized agriculture 
• Large amounts of fossil fuel, water, fertilizer, and 
pesticides to produce monoculture crops or livestock 
animals 
• Plantation 
• Form of industrialized agriculture – single ownership 
• Traditional subsistence agriculture  
– Produce only enough for the family 
• Traditional intensive agriculture 
– Increase outputs for profit 
 
 
Industrialized Agricultural 
Wastes and Land Pollution 
• Animal Confinement 
– Waste runoff 
• Overgrazing 
– Increases soil erosion 
• Sedimentation 
• Nutrient application 
• Irrigation  
• Pesticides 
 
 
Waste runoff increases nutrients 
and pathogens in streams 
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