Tag: atmosphere and its structures

• Weather is the state of the atmosphere at a particular place and time. Temperature, humidity, and visibility are the atmospheric phenomena hence part of the weather.
• Sunlight is independent of the atmosphere, thus option D is correct.

Cover of clouds in portion of the sky visible from the observation point is known as cloud cover. Weather observer or meteorologists estimates the amount of cloud cover in sky. Cloud cover is an important factor which decides the weather of an area. The amount of cloud cover in the sky is measured in units called oktas or eight for meteorological purposes. Each okta represents one eighth of the sky covered by cloud.

• The Pacific Ocean is the largest of the world's five oceans, followed by the Atlantic Ocean, Indian Ocean, Southern Ocean, and Arctic Ocean.
  
•  It covers an area of about 155 million square kilometers (about 60 million square miles).
  
• The Pacific Ocean is the largest and deepest of the world ocean basins.
  
• It covers around a third of the Earth's total area, more than all the land in the world.
  

• The diameter of the earth at the equator is 12756 km, thus the option A is the correct answer.