Question

Given below are the temperatures (in ${}^{\circ }C$) on ${15}^{th}$ August in a city for different years.

$\begin{array}{ccc}1980s& 1990s& 2000s\\ 1980\mid 25& 1990\mid 26& 2000\mid 25\\ 1982\mid 28& 1992\mid 24& 2002\mid 29\\ 1984\mid 27& 1994\mid 28& 2004\mid 28\\ 1986\mid 25& 1996\mid 27& 2006\mid 27\\ 1988\mid 26& 1998\mid 28& 2008\mid 29\\ Averagein1980s\mid 26.2& Averagein1990s\mid 26.6& Averagein2000s\mid 27.6\end{array}$

What do you understand about the climate change of the given place with this data?

• A. The climate is same over the decades.
• B. The climate has become cold over the decades.
• C. The climate has become warmer over the decades.
• D. The climate has changed drastically over the decades.

Answer 1

The correct option is C

The climate has become warmer over the decades.

$\begin{array}{ccc}1980s& 1990s& 2000s\\ 1980\mid 25& 1990\mid 26& 2000\mid 25\\ 1982\mid 28& 1992\mid 24& 2002\mid 29\\ 1984\mid 27& 1994\mid 28& 2004\mid 28\\ 1986\mid 25& 1996\mid 27& 2006\mid 27\\ 1988\mid 26& 1998\mid 28& 2008\mid 29\\ Averagein1980s\mid 26.2& Averagein1990s\mid 26.6& Averagein2000s\mid 27.6\end{array}$

We can see from the table that the temperature has increased from ${26.2}^{\circ }C$ to ${26.6}^{\circ }C$ from the 1980s to 1990s. It has also increased from ${26.6}^{\circ }C$ to ${27.6}^{\circ }C$ over the next decade. Thus, we can say that the climate has become warmer over the years in that city.