Winds, Storms and Cyclones — Science STD 7 — Question

What is the motion of our hands while running?

Give an example of parasites.

Mention any two examples each of insulators as well as of conductors.

What is soil profile? Name the layers found in soil profile.

Explain cellular respiration.

How does growing pulses in the field help the soil?

Sheep are herbivores, so which type of feed (or food) is provided by shepherds?

What is the portable source of electrical energy called?

Paheli observed that most of the fish in the pond of her village were gradually dying. She also observed that the waste of a factory in their village is flowing into the pond which probably caused the fish to die. If the factory waste is acidic in nature, how can it be neutralised?

Fill in the blank. When an acidic solution is mixed with a basic solution, they each ______ other forming ________ and water.