Electricity: Circuits and their Components — Science STD 7 — Question

How we can show that magnetic field exist around a wire carrying current?

We should not eat hurriedly. Give reason.

What is the portable source of electrical energy called?

Exchange of gases, food and other substances occurs between arteries and veins. How does this exchange occur?

Farmers spread manure of fertilisers in the field or in gardens, etc. Why are these added to the soil?

Two organisms are good friends and live together. One provides shelter, water, and nutrients while the other prepares and provides food. Such an association of organisms is termed as:

What happens when we add beetroot extract to water?

Give the name of few animals that can live in the polar region.

If you did not have a clock, how would you decide what time of the day is?

What do you mean by the transfer of heat?