The average temperature and rainfall over a long time, e.g. 30 years.

The average temperature and rainfall over a long time, e.g. 30 years.

• A. Atmosphere
• B. Climate
• C. Continentality
• D. Deforestation

Answer: (B)

Long-term average conditions define climate. Climate is the pattern of temperature and rainfall over extended periods, typically around 30 years or more, which smooths out short-term fluctuations. Weather is the day-to-day conditions, while climate reflects what’s typical for a region over time. The 30-year period is a standard climatology window used by meteorologists and researchers. The other ideas don’t capture this notion: the atmosphere is the gaseous layer around Earth, continentality is about inland-coast differences, and deforestation is a land-use change, not a measure of long-term averages.

Long-term average conditions define climate. Climate is the pattern of temperature and rainfall over extended periods, typically around 30 years or more, which smooths out short-term fluctuations. Weather is the day-to-day conditions, while climate reflects what’s typical for a region over time. The 30-year period is a standard climatology window used by meteorologists and researchers. The other ideas don’t capture this notion: the atmosphere is the gaseous layer around Earth, continentality is about inland-coast differences, and deforestation is a land-use change, not a measure of long-term averages.