Heat,Element and Molecules
Heat is a form of energy. Heat can be produced by chemical
means, e.g., by burning aviation fuel or by mechanical means, by fiction.
Passing electric current through a resistor also produces heat as in an
Substances that consist of only one type of atom are known as elements. EX. CARBON
If an element consists of more than one of the same type of atom, chemically bound together, it is known as a molecule. EX. OXYGEN, The term molecule can also be used to describe a substance that is made up of more than one type of atom, water is example.