Atmosphere is the air that surrounds us and the difference between weather and climate is a measure of time. Weather is what conditions of the atmosphere are over a short period of time, and climate is how the atmosphere “behaves” over relatively long periods of time.
Meteorology is the science of weather & Climatology is science of Climate.
Meteorology is the science of weather. The three basic aspects of meteorology are observation, understanding and prediction of weather. There are many kinds of routine meteorological observations. Some of them are made with simple instruments like the thermometer for measuring temperature or the anemometer for recording wind speed. Weather data is collected using satellites and other means and these are plotted on weather charts and analyzed at forecasting centers. Weather forecasts are then made.
Climate is how the atmosphere “behaves” over relatively long periods of time & Climatology is science of Climate.
Do climates change? Yes. Climates may undergo large permanent changes and short-term changes.
Take Rainforest as an example, look at the annual temperatures. They vary in a specific way. If we cut down all of the trees in the forest, the temperatures will heat up. Since it is unlikely the forest will be able to grow back for hundreds of years, you would see a long-term climate change.
El Nino and La Nina are known as short term climate change.