The Fundamental Unit of Life — Science STD 9 — Question

The particle which is formed by the gain of electrons by an atom is called _________.

The physical quantity which gives both speed and direction of motion of a body is called its __________. (Speed, Velocity, Acceleration)

The nuclear region of prokaryotic cells is called ________. (Nucleus, Nucleoid, Chromatin)

A mole represents an ____________ number of particles of a substance. (Avogadro, Atomic, Molecular)

Sound is caused by _____.

A thick waterproof coating of _________ occurs over the epidermis in desert plants. (Cutin, Lignin, Suberin)

The ability of a body to do work is called Energy. The ability of a body to do work because of its motion is called __________. (Energy, Work, kinetic Energy)

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

Echoes are caused by the ______ of sound.