Science Enhanced Scope & Sequence Grade 6

Stream Flow and Slope 204 ... it has a tail, caused by the evaporation of its surface due to the heat of the sun. The constant force of particles from the sun and the pressure of sunlight blow a comet’s tail away from the sun as the comet orbits. ... Water also lubricates our muscles so they can move. People can live a few weeks without food ... ................
................