Question

How is the sea level measured
Ans:-

There are high tides and low tides on the levels of the seas and they never stand still. As a result of this phenomenon, the level of the sea keeps in rising and falling​

Answer 1

Answer:

Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often adsorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity.