short note on water cycle

what is greenhouse effect

where to find online nasa astronomy olympiad sample papers?

how do forest play an important role in maintaining water cycle?

Why is atmosphere essential for life?

explain the process of soil formation

explain oxygen cycle

Please explain the Nitrogen cycle as per NCERT Science textbook in simple language.

what are two types of natural resource ? define and give example of each

Definition of air pollution and water pollution

if atmosphere is held by the gravity, then why is it not falling into earth?? as gravity pulls everything towards earth. Then what is the force acting opposite to gravity????

Name two biologically important compounds that contain both oxygen andnitrogen. what is the role of nitrogen fixing bacteria?

 can you plz give answers of activity 14.1 from ncert book (chp.14) and its reasons?????

what can we do to reduce air pollution, water pollution, soil pollution and noise pollution

explain carbon cycle and write its importances ?