Our environment Worksheet

Our environment Worksheet-7

41. What are omnivores? Give one example.

42. List two basic functions of food chain in the ecosystem.

43. Which of the following belong to the same trophic level:

(a) Grass, hawk, rabbit, frog, deer.

(b) Grasshopper, spider, grass, hawk, lizard.

(c) Frog, grasshopper, grass, hawk, algae.

(d) Grasshopper, frog, snake, grass, lizard.

(e) Grass, grasshopper, frog, algae, snake.

Our environment Worksheet-8

51. With the help of arrows depict the aquatic (in a pond) food chain.

52. What is a 'decomposer'?

53. Write the food chain of a non-vegetarian.

54. Name the organism belonging to the 4th trophic level in the food chain comprising the following: Snakes, Insects, Frogs, Plants, Hawks.

55. Which one of the following is not a terrestrial ecosystem : Forest, Grassland, Aquarium, Desert

56. Arrange the following in a food chain :

(a) Frogs, Insects, Birds, Grass.

Our environment Worksheet-9

71. What are functions of an ecosystem?

72. Name the main components of an ecosystem.

73. What do you call a functional unit, comprising of living and non-living components?

74. Give two examples of man-made ecosystems.

75. Why do all food chains start with plants?

76. Give an example of a food chain that is the shortest.