Question

write an activity to separate healthy grains from spoiled ones .

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Answer 1

Answer:

Activity

Aim: To separate healthy grains from spoiled ones

Materials needed: A beaker or glass bowl, water, and wheat grains

Method:

1. Fill the beaker with water.

2. Put some wheat grains in the beaker. Stir them and leave them undisturbed for some time.

3. Observe the grains inside the beaker.

Observation: Some grains settle down at the bottom of the beaker while some float on the surface of the water (see figure).

Conclusion: Grains that have been damaged by insects tend to be lighter and float on the surface. Healthy grains are heavier and settle down at the bottom.

Answer 2

Answer:

Answer

Take a beaker or mug filled with water in it.

Put all the seeds on the cup of water.

Let all the seeds to settle down.

The seeds which settles down are the healthy seeds.

And the seeds that floats on the water are spoil or damaged as they are porous and defected.