Class 10th Science Biology Experiment 5 Study of ecosystems Solution & Answer.
Aim : To study different ecosystems in the surrounding for a comparative understanding.
Requirements : Writing material, binoculars, shovel, troughs, beakers or any other containers for collection.
Procedure:
- Try to understand the concept of ecosystem before you choose the same for study.
- A huge tree, a lake, a pond, certain area of field, our own school playground, a butterfly garden if it ispresent in your school campus, a big aquarium, a coastal strip, a beach, etc. are some ecosystems which you can choose for study.
- Always remember, never disturb any natural ecosystem by plucking the plant parts or killing the animalsor insects. Thus, while performing your study, take care of all the resident fauna and flora, i.e. animalsand plants in the area concerned. You may choose to photograph the specimens. You can also collectfallen leaves or flowers and seeds.
- You can collect samples of soil with shovel so that at school laboratory you can analyse the pH, colouretc. of the soil. Enter the details in the tabulations given below.
- Also think about conservation measures to protect these environments. In today’s world all the natural ecosystems are destroyed in pursuit of development. You can focus your work on some conservation measures.
Observations:
| Ecosystem | Ecosystem – 1 | Ecosystem – 2 |
| Date or Period of study | Rainy season | Rainy season |
| Name of Ecosystem | School play ground | Pond |
| Abiotic factors | Soil, water, sunlight, air | Water, sunlight, mud, stone |
| Biotic factors (Flora and Fauna) | Plants, grasshopper, frog, earthworm | Algae, frog, snake, aquatic plants |
| General description | Ecosystem of school playground is healthy. | Ecosystem in pond is also found healthy. |
| Conclusion | Conservation and plantation is required. | We can protect pond ecosystem by avoiding contamination. |
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Diagram :
Draw a food web or food chain from the ecosystem that you have studied.
School playground ecosystem
Conclusion :
Draw the inference about the health of ecosystem that you have studied. Check-up whether thisecosystem is sustaining or is threatened due to human activities.Out of the ecosystems that I have studied, I found
pond
ecosystem as the most healthy and balanced andin good condition, because,
Pond water was clean and without any garbage. People were taking care of pondecosystem. Notice boards were displayed mentioning about not to throw garbage in pond and surrounding area.Polluting pond water by washing utensils, clothes, bathing, etc. was prohibited.Balanced proportion of biotic as well as abiotic factors was observed in pond ecosystem.
Multiple Choice Questions
Choose the correct alternative and write its letter (A), (B), (C), (D) in the box :
1. The aquatic ecosystems are worst affected by which of the following human interference?
(A) Noise pollution (B) Plastic Pollution (C) Deforestation (D) Construction activities
Answer: B
2. Which abiotic factor is the most important for the survival of animals?
(A) Oxygen content (B) Nitrogen in air (C) Carbon dioxide concentration (D) Soil structure
Answer: A
3. Which of the following are autotrophic organisms found in sea?
(A) Whale (B) Phytoplanktons (C) Fishes (D) Turtles
Answer: B