Pressure, Winds, Storms, and Cyclones — Science STD 8 — Question

A compound contains atoms of only one element.

There can be a wildlife sanctuary within a blosphere reserve.

State whether the following statements are true or false: A drinking straw works on the pressure exerted by the liquid filled in a soft drink bottle in which it is placed.

A lightning conductor transfers the electric charge to the ground.

Loud sounds have high frequencies.

A seismograph records waves.

Force cannot change the speed of an object.

Growing different crops in different seasons in the same field will deplete the nutrients of soil .

Electric current produces a magnetic effect.

State whether the following statements are true or false: Coke is almost pure form of carbon.