Sorting Materials Into Groups — Science STD 6 — Question

The handles of ‘the tools like screwdrivers and pliers used by electricians for repair work usually have plastic or rubber covers on them. Can you explain why?

What adaptations of a lion help him as a predator?

Classify the following animals into herbivores and carnivores: Lizard, chameleon, crocodile, elephant, pigeon, monkey, lion, eagle, deer, leopard, camel, goat, frog and rat.

Classify the leaves of following plants on the basis of arrangement of veins into parallel venation and reticulate venation: Wheat, tulsi, banana, china rose, sugar cane, banyan, maize, neem, bamboo, cynodon (type of grass), mango, pipal.

Explain giving scientific reasons: Cat is an omnivore.

If iron nails have fallen from your hands on the floor, then how will you speedily pick them all?

Explain giving scientific reasons: A mango tree cannot go from one place to another, then too it is living.

Classify the following changes into reversible and irreversible: Ripening of a mango, compressing a spring, burning of wood, souring of milk, melting of ice cream, blowing a balloon, glowing of a bulb, burning of coal, growing old, heating of tar, cooking dal from pigeon pea g rains dissolving alum in water.

Explain winnowing in brief.