The ocean floor is a part of the Earth's lithosphere. Lithospheric plates on the ocean floor move. Identify that the lithosphere includes the crust and parts of the upper mantle, and is broken into large sections known as plates. Recognize that plate movement produces volcanoes, earthquakes, and mountains on the ocean floor. Explain how the water cycle affects the salinity of the ocean's water.
Gravity is the force that explains the phenomena of the tides.
Describe the relationship of the positions of the sun and the moon on the ocean's tides. A mixture of substances often can be separated into the original substances using one or more of the characteristic properties. Distinguish between a mixture and a solution, recognizing that a solution is one type of a mixture. Identify the potential dangers associated with using some mixtures and solutions, such as bleach, ammonia, abrasive powders, etc. Investigate the effect of temperature changes on the solubility of a substance.