Earth, Moon, and the Sun — Science STD 7 — Question

Which is a method to prevent rust?

Which material allows water to seep through most slowly?

Convection currents are formed in:

"By providing clean water and sanitation to the poorest people on the planet, we can reduce poverty and suffering and ensure education for all children".
The above words are given by:

Which of the following is a part of inorganic impurities of the sewage?

Heat is transmitted from higher to lower temperature through actual mass motion of the molecules in:

The soil that can be moulded into any shape is:

The fleece of the sheep along with a thin layer of skin is removed from its body is called:

Which of these labels on an electric device confirms standard quality?