Directions: Write True if the statement is correct and False if it is wrong. 16. The physical properties of matter can be determined by observing the object. 17. The melting point and freezing point of a particular object are the same. 18. Matter can exist in a solid, a liquid, or a gas in any temperature and pressure. 19. The boiling point of a substance is the temperature at which liquid changes to gas. 20. Melting is a physical change. 21. By putting a spoonful of sugar into a glass of water, the sugar turns into a liquid. 22. Any change in the state of matter is a physical change. 23. Naphthalene balls changes from solid to gas is an example of chemical change. 24. Freezing is a chemical change. 25. Boiling is a physical change.​