Put a drop of me on a cut potato. It turns dark blue.

Collect a cup of greenish pond water in our surroundings. Put a drop of water on the slide. Keep it under microscope and observe. What would you find out ? Draw rough

When drops of lemon juice are put on blue litmus it turns red. What will happen if you put some drops of soap solution on the same position on litmus paper?

Rearrange the following sentences in a correct order (i) Add a few drops of dilute Iodine solution to the sample (ii) If the substance turns dark - blue or black it contains starch (iii) Prepare the dilute iodine solution .(iv) Take a sample of food item in the test tube

When we put a drop of, red ink in 100 ml. of water, we observe that all the water becomes purple in colour after some time. Why ?

Collect water samples from a pond, well, bore well.Keep then separately. Put a drop of water on a slide. Keep a cover-slip, on it. Observe. under the microscope. What type of microorganisms do you see in water samples?

Collect water samples from a pond, well, bore well.Keep then separately. Put a drop of water on a slide. Keep a cover-slip, on it. Observe. under the microscope. Do all water samples have the same type of microorganisms?

Collect water samples from a pond, well, bore well.Keep then separately. Put a drop of water on a slide. Keep a cover-slip, on it. Observe. under the microscope. Which water contains larger number of microorganisms? Why?

Collect water samples from a pond, well, bore well.Keep then separately. Put a drop of water on a slide. Keep a cover-slip, on it. Observe. under the microscope. Is there any water without microorganisms?

Collect water samples from a pond, well, bore well.Keep then separately. Put a drop of water on a slide. Keep a cover-slip, on it. Observe. under the microscope. What kind of microorganisms do you find in the water from a pond and borewell?