my code is
\renewcommand{\arraystretch }{1.2}
\begin{table}[h]
\begin{center}
\begin{tabular}{|c|c|c|c|c|c|}
\hline
\multicolumn{2}{|c|}{Altitude (km)}&\multicolumn{2}{|c|}{Temperature (\degree C)}&\thead{Lapse rate\\ (K/km)} &\\
\cline{1-4}
\multicolumn{1}{c|}{from}&\multicolumn{1}{c|}{to}&\multicolumn{1}{c|}{from}&\multicolumn{1}{c|}{to}& &\\
\hline\hline
0 &11 &15 &$-56.5$& $-6.5$& troposphere\\\hline
11 &20 &$-$56.5& $-$56.5& 0 &stratosphere\\\hline
20 &32 &$-$56.5& $-$44.5& 1.0& stratosphere\\\hline
32 &47 &$-$44.5 &$-$2.5& 2.8& stratosphere\\\hline
47 &52 &$-$2.5 &$-$2.5 &0 &mesosphere\\\hline
52 &61 &$-$2.5 &$-$20.5& $-$2.0& mesosphere\\\hline
61 &79 &$-$20.5 &$-$92.5 &$-$4.0 &mesosphere\\\hline
79 &90 &$-$92.5& $-$92.5& 0 &thermosphere\\
\hline
\end{tabular}
\end{center}
\end{table}
\degree
defined?\multicolumn{1}{|c|}{from}
,\multicolumn{2}{c|}{Temperature (°C)}
and\multirow{2}{*}{\thead{Lapse rate\\ (K/km)}}
(Requires themultirow
package).