Chapter Name: Living with Non-Living
Activity Name: Micro organisms in water in Living with Non-Living
In this experiment, you will collect water samples from different sources such as a pond, well, and bore well. By observing these samples under a microscope, you will determine the presence and types of microorganisms in each water sample. Additionally, you will compare the abundance and appearance of microorganisms in pond water and bore well water.
- Water samples from a pond, well, and bore well
Step by Step Procedure:
- Collect water samples from a pond, well, and bore well, ensuring that each sample is kept separate.
- Place a drop of one of the water samples onto a microscope slide.
- Carefully place another slide on top of the water drop to create a sandwich-like structure with the water in between.
- Place the prepared slide on the microscope stage.
- Adjust the microscope to a suitable magnification and focus on the water sample.
- Observe the slide under the microscope and note the presence and types of microorganisms you see.
- Repeat steps 2-6 for the other water samples.
- Make drawings of the observed microorganisms, paying attention to their shapes and structures.
- Compare the microorganisms present in each water sample and note any differences in their appearance.
- Identify and record the types of microorganisms observed in each water sample.
- Note if all water samples contain the same types of microorganisms or if there are differences.
- Determine if any water sample is devoid of microorganisms.
- Compare the abundance of microorganisms in the different water samples.
- Handle the microscope and slides with care to avoid damage.
- Use clean slides and coverslips to prevent contamination.
- Avoid touching the glass surfaces of the slides and coverslips to maintain clarity.
- Ensure the microscope is properly focused to obtain clear observations.
- Dispose of the water samples properly after the experiment to prevent contamination.
Lesson Learnt from Experiment:
- Microorganisms are present in various water sources, such as ponds, wells, and bore wells.
- Different water sources may contain different types and abundance of microorganisms.
- Not all water samples may have the same types or quantity of microorganisms.
- Some water sources may be devoid of visible microorganisms, while others may contain a larger number of them.
- Microorganisms can have diverse shapes and structures, which can be observed under a microscope.