Today we discussed matter. Everything in the universe is made up of matter. Matter can be classified as substances of mixtures. A substance is pure and is either made up of elements, the simplest form of matter found on the periodic table, or compounds - two or more atoms chemically combined that can be represented with a formula (ie. H2O).
mixture is two or more things (substances or anything really) in the
same place at the same time. Salt water is a tricky one because we know
we can write a formula for salt (NaCl) and water (H2O), but it is a
mixture because when mixed in solution, these compounds do not combine.
important thing we discussed today was the Law of Conservation of
Matter proposed by Lavoisier. Basically matter cannot be created or
destroyed... it is conserved or recycled or moved somewhere else, but it
cannot magically appear or disappear!
Global Ocean Conveyor - Today students began class with a BrainPop on currents and took the quiz. Tim and Moby did an excellent job describing how currents affect global weather ...
6 months ago