Substances can exist in three states of matter - solid, liquid and gas. Substances can change states. To change the state of a substance energy must be transferred to, or from, the substance.

After viewing a model of salt, students help develop models for the processes of salt dissolving, water evaporating to form a gas, and salt re-forming as a crystal. The focus is that matter, whether ...

The proposed $420 million plant is poised to advance Tanzania energy sector by converting natural gas into diesel and jet ...

The Pennsylvania Department of Transportation is allocating $468 million to Lawrence County municipalities in liquid fuel funds for the upkeep of roads and bridges. This year’s funding, distributed to ...