6 de nov. 2014

EROSION



Pupils in fifth grade studied erosion. What happens if we blow the sand (the wind) or we put water (the rain) into the soil. Can we see erosion? Can we prevent erosion? What about planting trees and vegetables?


Publicat per a
Etiquetes de comentaris: , , ,

Cap comentari:

Publica un comentari a l'entrada

Subscriure's a: Comentaris del missatge (Atom)