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 ...

As per data from the US Energy Information Administration, the United States will have proven reserves of 'liquid gold' of 48 ...

The Minister of Energy and Green Transition, John Abdulai Jinapor, says the country has to transition from liquid fuel to ...