PYP

Gun Powder

Reversable and Irreversable changes

Ecosystem

An ecosistem is all the living things example.house,rivers,jungles etc.

in an ecosistem ,each organise has 

its oun  rules and also the house of many

animals tht live there.

Water Pollution

What is water polution

Water pollution is the contaminationo by humas to
the animal that livein the water and drink water
of lakes oceans rivers 

Water as source of energy

What is hydroeletic power


hydroeletic  power  is make of kinetic energy  water gains when it drops
in elevation tipycal ,water, dammed in a lake or reservoirs is released
thous tubines and generators to produce electricy