Question

essay on climate for class 9 students ​

Answer 1

Explanation:

Unseasonal rains, floods in many regions of Asia. hurricanes in America, major drought in Australia, severe heat wave in central Asia and so on. These are the happenings which indicate the climate change which is the result of global warming (earth getting warmer due to increase in human activity and increased amount of carbon dioxide emission into the atmosphere).Also, there is evidence of the attic ice sheets melting which may lead to rise in sea levels. So. climate change is real and we are the prime cause.

Man’s growing needs, increased use of coal and petroleum are the main reasons for increase in Carbon Dioxide (CO2) emissions. We have crossed 380 PPM (parts per million) of CO2 and are adding 2 PPM every year-heating up the earth than ever before. The limit or safe level of concentration of Carbon Dioxide in atmosphere is 400 PPM according to scientists. Another major reason for climate change is de-forestation in the name of development.

Most of the developing countries like China and India along with developed nations are major carbon dioxide emitters. USA, China, Russia, India, Japan. Germany and Canada are listed growing 3 times as fast as that of the world.

The World Health Organization estimated that 150,000 additional deaths took place and 5.5 million life years were lost in 2003 because of climate change affecting health. More disasters are yet to happen if we go on the same path of thoughtless development. It also estimates that Amazon rain forest could turn into a desert, life forms could get lost, and loss of lives and livelihoods. famines and conflict between people may become a part of life as result of climate change. The very thought of it is scary and the world seems to be heading towards a dangerous situation.

Answer 2

Weather and Climate:

Weather is the day-to-day state of atmosphere and pertains to short term changes in conditions of heat, moisture and air movement. Weather results from processes that attempt to equalise the differences in the distribution of net radiant energy from sun. In other words, the instantaneous state of atmosphere can be called as weather. It is usually expressed as fine, fair, foggy, cloudy, rainy, sunny or windy weather.

The process of exchange of heat and moisture between earth and atmosphere over a long period of time (month, season, and year) related to large areas (zone, state, country, continent) results in conditions what we call climate.

It is aggregate of atmospheric conditions involving heat, moisture and air movement. In other words, the totality of weather over a large area is known as climate. It is expressed as marine, continental, arid, semiarid, humid or desert climate.

Weather refers to the sum total of the atmos­pheric conditions in terms of temperature, pressure, wind, moisture, cloudiness, precipitation and visibility of a particular place at any given time. In fact, weather denotes short-term variations of atmospheric condi­tions and it is highly variable.

On the other hand, climate is defined as aggregate weather conditions of any region in long-term perspective. According to Trewartha ‘climate represents a composite of day to day weather conditions, and of the atmospheric ele­ments, within a specified area over a long period of time.’ According to Critchfield ‘climate is more than a statistical average; it is the aggregate of atmospheric conditions involving heat, moisture, and air move­ment. Extremes must always be considered in any climatic description in addition to means, trends, and probabilities.’

According to Koeppen and De Long ‘climate is a summary, a composite of weather condi­tions over a long period of time; truly portrayed, it includes details of variations-extremes, frequencies, sequences-of the weather elements which occur from year to year, particularly in temperature and precipita­tion. Climate is the aggregate of the weather.’

G.F. Taylor has maintained that ‘climate is the integration of weather, and weather is the differentiation of cli­mate. The distinction between weather and climate is, therefore, mainly one of time.’ Temperature, pressure, wind, humidity, precipitation, cloudiness etc. are ele­ments of weather and climate.