JAMB Geography 2017 Paper

Isohyet is a line on a map that connects areas of equal rainfall

Isotherm is a line on a map of the earth surface that connect points having the same temperature at a given time or for a given period

Isobar is an imagining line or a line on a map that connects areas of equal atmosphere pressure.

Isopach is a line that connects points of equal thickness of a geographical stratum (many layers of a substance) formation