Natural Resources — Science STD 9 — Question

A sound wave consists of places of higher pressure called compressions and places of lower pressure called __________. (Rarefactions, Compressions, Nodes)

The anode rays obtained from hydrogen gas consist of particles called __________. (Protons, Electrons, Neutrons)

An element is made up of only one kind of _________.

A mixture of ammonium chloride and sodium chloride can be separated by ________. (Sublimation, Filtration, Sedimentation)

The total mechanical energy of a mass remains __________ during free fall. (Constant, Increasing, Decreasing)

Matter can neither be created nor destroyed is the law of __________. (Conservation of Mass, Conservation of Energy, Chemical Reaction)

Snow shoes work by spreading out a person’s _______ over a much bigger ______.

0.5 mole of calcium element has a mass of ____________. (20g, 40g, 10g)

If the weight of a body is 6N on the moon, it will be about __________ on the earth. (12N, 36N, 18N)