Agricultural Science

Question 1

1Nitrous oxide from farms comes mainly from

Hard

A. nitrogen fertilisers and manure B. irrigation water C. pesticides only D. tractors only

Question 2

2Which gas from livestock and rice fields is a powerful greenhouse gas?

Easy

A. oxygen B. methane C. argon D. nitrogen

Question 3

3Which gas is a greenhouse gas?

Easy

A. methane B. nitrogen C. oxygen D. argon

Question 4

4Burning crop residues on farms releases

Easy

A. nitrogen fertiliser B. oxygen C. carbon dioxide and smoke D. water only

Question 5

5One way farmers can reduce global warming is by

Easy

A. using more fuel B. burning bush C. planting trees and reducing burning D. clearing more forests

Question 6

6Rising temperatures can reduce crop yields by

Easy

A. causing heat stress and water shortage B. killing all pests C. improving soil D. increasing rainfall always

Question 7

7Deforestation contributes to global warming because

Easy

A. forests cool too much B. it increases rainfall C. trees produce heat D. fewer trees absorb carbon dioxide

Question 8

8Global warming is the

Easy

A. movement of continents B. gradual rise in the earth's average temperature C. cooling of the earth D. change of seasons

Question 9

9The burning of bush before planting contributes to global warming by

Easy

A. releasing carbon dioxide and destroying vegetation B. adding oxygen C. cooling the soil D. increasing rainfall