How understand the abstract concepts like motion of planets,,, climate,density ,,etc concepts to 8th class students?

ಕೊಡುಗೆ: Shivaraj chikkalli | Apr 15, 2019
18327 ನೊಂದಾಯಿತ ಬಳಕೆದಾರರು
7150 ಸಂಪನ್ಮೂಲಗಳು