Physics, Science, Middle school Keywords: Density, uphtrust (buoyancy), liquids, gases, pressure, floating, lifting, sinking, overall density, average density Presents the concept of upthrust, and how the relation...

These short notes are prepared by including all the important key points in the 4th unit- 'Ecosystems' which are important to the students in their exams. So, this study material can refer by the students to quickly...