Coal and Petroleum — Science STD 8 — Question

State whether the following statements are true or false: Pole Star is a member of the Solar System.

All three states of matter can co-exist at a time for any substance.

Solids have a fixed shape and a fixed volume.

Atmospheric pressure is less at higher altitudes.

An instrument called microscope is required to see the microorganisms.

State whether the following statements are true or false: The number of oscillations per second of a vibrating object is called its time-period.

A lunar eclipse occurs when the Moon comes between the Earth and the Sun.

Jute is a rabi crop.

Microorganisms can be seen with naked eyes.

Lightning conductor cannot protect a building from lightning.