The asthenosphere is the semi-fluid, plastic layer of the upper mantle that lies below the lithosphere. Convection currents in the asthenosphere drive the movement of the rigid lithospheric plates above it. This movement causes continental drift, earthquakes, volcanic activity, and mountain building.

Break down complex topics into smaller, manageable chunks for easier recall.

Zambia

• ivwananji siwale – 29 pts

• Mid-point of A Line
• Equation of a Straight Line
• Parallel and Perpendicular Lines
• Area of Rectilinear Figures
• Distance of A Straight Line