P-2 Disaster Management — Science STD 10 — Question

What is the sign of the power of (i) a convex lens (ii) a concave lens?

Name a non-metal having a very high melting point.

Apart from cattle dung, what other substances can be added to a biogas plant?

In which direction do electrons flow?

When does overloading occur?

Out of photosynthesis and respiration in plants, which process occurs:

1. All the time?
2. Only at daytime?

Temperature, conduction, convection, radiation.

Three elements having a single electron in their outermost shell.

When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what the following are examples of:
The smell of the food.

The period with electrons In the shells K, L and M.