Solution:
For decades, scientists believed that the atmosphere of early Earth was highly reduced, meaning that oxygen was greatly limited. By 2.7 billion years ago, a new kind of life had established itself: photosynthetic microbes called cyanobacteria, which were capable of using the Sun's energy to convert carbon dioxide and water into food with oxygen gas as a waste product.

Solution:
Just before sunrise one can record the lowest temperature of air. The longer the night is, the more intense this effect is, so that's one reason the temperature will drop right before sunrise (as the night goes on).

Solution:
Advection fog is formed by the slow passage of relatively warm, moist, stable air over a colder wet surface. It is common at sea whenever cold and warm ocean currents are in close proximity and may affect adjacent coasts.

Solution:
The sequences of clouds in ascending order would one meet 500 metres and above the mean sea level are Stratus, Nimbus, Cirrostratus, Cirrus.

Solution:
Stratosphere is free from the violent weather changes which occur below in the Troposphere.

Solution:
Dew points indicate the amount of moisture in the air. The higher the dew points, the higher the moisture content of the air at a given temperature. Dew point is a temperature at which a given sample of air becomes saturated.

Solution:
The monsoon has well-developed cycle in South and South East Asia. The monsoon through axis experiences considerable day to day variation in its position, which has a vital bearing on the monsoon rainfall distribution in the region.