If you had a bucket that contained a mixture of sand and seashells how might you use the physical properties of seashells to separate them from the sand

Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?