Lesson 21:   RAINWATER ACTION ON LIMESTONE LANDSCAPE Limestone is a sedimentary rock of organic origin derived on the accumulation of […]

weathering types LESSON 20:   WEATHERING Denudation is the wearing away of the earth surface by various elements like weathering, erosion, […]

volcanicity LESSON 16: VOLCANOES AND MAN VOLCANICITTY It is the process were solid, gaseous and liquid materials are ejected on […]

plate tectonics LESSON 15: PLATE TECTONICS Plate tectonics is the twisting, bending and breaking of the crust and its rocks […]

LESSON 14: THE THEORIES OF THE EARTH STRUCTURES CONTINENTAL DRIFT This theory describes the tearing and movement of continents apart. […]

rocks of the earth LESSON 13: ROCKS A rock is the nonliving solid path of the earth crust that contains […]

internal structure of the earth LESSON 12: THE INTERNAL STRUCTURE OF THE EARTH Evidence from earth quake volcanic eruption, digging […]

Rotation and revolution of the earth LESSON 9: ROTATION OF THE EARTH Definition: It is the spinning of the earth […]

calculating time and date PRACTICAL WORK2: CALCULATING TIME AND DATE How to calculate the local time of a place from […]

local time, standard time and international date line LESSON 6: LOCAL TIME   This is the time of the day at […]