Determining the differences between chemical and physical changes
Change in chemical properties and composition of the substance. Extensions: Students working above grade level could be provided with text at a higher reading level.
In fact this should be considered more of a continuum. How can matter change chemically?
Poster size diagrams can also be drawn by students to assist with their explanations. Physical changes and chemical changes have much in common in that you are looking at similar kinds of results.
Export To Students will be directed back to the text to determine ways in which physical and chemical changes are similar and different using the information provided in the text.
Characteristics of physical change
Scientific view In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. Students will be reminded to refer to these questions as they read: What did I learn from reading this text? During a physical temperature change, one substance, such as water is being heated. Definition of Physical Change Physical change is a process in which the substance experiences change in its physical properties like shape, size, colour, volume, appearance, state i. Both the drop and the pot of oil are at the same temperature an intensive property , but the pot clearly contains much more heat extensive property. In chemical reactions the changes that you observe are caused by the creation of or loss of different kinds of materials. For example, many elements conduct heat and electricity well, whereas others are poor conductors. One example of matter changing physically: Cheese can begin as a solid and then melt to become a liquid. Other examples of physical changes include magnetizing and demagnetizing metals as is done with common antitheft security tags and grinding solids into powders which can sometimes yield noticeable changes in color. Common Chemical Changes The follow are all indicators of chemical reactions.
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