4) Elements cannot be broken down into another substance
Explanation:
Compounds are made up of multiple elements (different or same element). Whereas, elements are made up of single type of atoms. Water is a compound which can be broken down into Hydrogen and oxygen using chemical reactions whereas, you cannot break elements down into another substance.
Common examples include carbon, sulfur, oxygen, iron, copper, aluminium. Elements are represented by symbols. Compounds are substances made from atoms of different elements joined by chemical bonds. They can only be separated by a chemical reaction.
Explanation:
Substances can be categorised as either elements or compounds. Both of these are made up of atoms, the only difference is an element is made of one type of atom whereas compounds are made of two or more different types of atoms.
The direct source of energy to move the sailboat is probably wind, since wind is what pushes the sail of the sailboat, which is what propels the sailboat forward.
