Natural resources

Natural resources Worksheet-4

11. Which of the following process in not responsible for increasing the concentration of carbon dioxide in air?

A. Photosynthesis                         B. Combustion

C. Transpiration                           D. Weathering of rocks

12. The direction in which wind blows is affected by :

A. Rotation of earth                     B. Presence of Mountains

C. Uneven heating of land D. All of these

Natural resources Worksheet-5

21. Which of the following is an example of detrivorous organism?

A. Liver fluke                                 B. Millipede

C. Round worm                            D. Tape worm

22. Which is the largest particle of soil?

A. Gravel            B. Sand              C. Silt                  D. Clay

Natural resources Worksheet-6

31. Eutrophication reduces the amount of ______ in water:

A. Dissolved Nitrates                   B. Dissolved Salt

C. Dissolved nitrates                    D. Dissolved oxygen

32. In Nitrogen cycle, which of the following bacteria is responsible for denitrification?

A. Nitrosomonas                          B. Nitrobacter

C. Pseudomonas                          D. Rhizobium