Materials Around Us — Science STD 6 — Question

While using iodine in the laboratory, some drops of iodine fell on Paheli’s socks and some fell on her teacher’s saree. The drops of iodine on the saree turned blue black while their colour did not change on the socks. What can be the possible reason?

Why should recycled plastics not be used for storing eatables?

What is reflection of light? Explain reflection of light with the help of an activity.

Classify the objects as opaque, transparent and translucent.
Fog, glass, wood, plastic box, smoke, water.

Read the items of food listed below. Classify them into carbohydrate rich, protein rich and fat rich foods.
Moong dal, fish, mustard oil, sweet potato, milk, rice, egg, beans, butter, buttermilk (chhachh), cottage cheese (paneer), peas, maize, white bread

Write various methods of separation of compounds from their mixture.

What is winnowing? Where is it used?

Draw the diagram of a bee hive.

How does a planet differ from a star?