atmosphere & climatology section 5 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (d)

The troposphere is the lowest portion of Earth's atmosphere. It contains approximately 80% of the atmosphere's mass and 99% of its water vapor and aerosols. Most of the phenomena we associate with day-to-day weather occur in the troposphere.

Answer: (c)

As seen from the Earth, a solar eclipse occurs when the Moon passes between the Sun and Earth, and the Moon fully or partially blocks the Sun.

This can happen only at the new moon when the Sun and the Moon are in conjunction as seen from Earth. In a total eclipse, the disk of the Sun is fully obscured by the Moon.

In partial and annular eclipses only part of the Sun is obscured. The moon blocks out the bulk of the sun allowing us to see the chromosphere and corona.

Answer: (b)

Condensation is the change of the physical state of matter from the gaseous phase into a liquid phase and is the reverse of vaporization.

When the relative humidity reaches 100 per cent, the air is completely saturated. The air temperature is said to be a dew-point.

Answer: (b)

Answer: (d)

Air masses are relatively large bodies of air that are fairly horizontally uniform in characteristics. These air bodies are relatively uniform in temperature and moisture content and may extend across an entire continent.