Water — Science STD 6 — Question

What do you think of Raman's statement, "All starches are carbohydrates, but not all carbohydrates are starches." Describe the design of an activity to test your answer.

You are provided with the following materials-turmeric, honey, mustard oil, water, glucose, rice flour, groundnut oil.
Make any three pairs of substances where one substance is soluble in the other and any three pairs of substances where one substance remains insoluble in the other substances.

What are the three stages in history of the development of clothing material?

What is marasmus? What are its symptoms?

Activity.Take two glasses and pour half a cup of water in each of them. Add a teaspoon of salt to one glass and stir till the salt dissolves. Go on adding salt, one teaspoon at a time, till the solution saturates. Record the number of spoons of salt that dissolved in the water, in Table. Now, repeat the same activity with sugar. Repeat this with some other substances that are soluble in water.
What do you notice from Table? Do you find that water dissolves different substances in different amounts?

Where do bees store honey?

Classify the following as transparent or translucent or opaque material.
Cardboard, glass, water, oily paper, wood, stone, metal.

What are the precautions need to be taken while handling a magnet

Classify the following fibres as natural or synthetic:
Nylon, Wool, Cotton, Silk, Polyester, Jute.