PPT-Physical vs. Chemical Changes

Comparing Changes Physical Change Alters the form or appearance of matter Substance remains the same after the change Examples change in state slg bending crushing chopping. perfume evaporating on your skin . perfume evaporating on your skin . physical.  butter melting .  butter melting . physical. wood rotting.  . wood rotting.  . chemical. autumn leaves changing color. #1: What happens to a substance when a chemical change occurs?. #2: What are some signs of a chemical change?. Bell Ringer: Tuesday 10/1/13. Read the paragraph below and determine the main idea. Then, write and answer the questions. 1.7. Physical Changes. Physical Change. : the substance involved remains the same, even though it may change state or form. . Examples: . Dissolving – stirring a spoonful of sugar in water. Melting –an ice cube melts. Matter. Every element/compound is unique in some way from all others.. If you know enough about a substance, you can figure out what it is.. If you know what a substance is, you can know all types of things about it.. A half eaten apple turns brown.. Physical or Chemical Change?. Chemical Change. Ripping paper into little pieces. Physical or Chemical Change?. Physical Change. Melting a popsicle. Physical or Chemical Change?. EQ: How are changes in matter related to changes . in energy?. Changes in Matter. You are at the beach. You built a sandcastle!. You notice storm clouds gathering in the distance.. You are sad : (. You know your sandcastle is about to go bye-bye.. Navo. Middle School Science. Physical Change. A change in the size, shape, form, or state of matter that does not change the matter’s identity.. Examples:. Play-doh. being sculpted. Ice Cream melting. Physical Property. Physical property = a characteristic of matter that can be . observed or measured . without changing the identity of the substance. . Ex: . mass volume . density hardness. color malleability. Changes. The Difference. Physical Change . – . matter changes form . but is still made of the same molecules, typically . reversible. Chemical Change . – a . change in the molecules . occurs, . cannot be reversed. The Digestive System. Amazing Facts . . We make 1-3 pints of saliva a day.. The average male will eat about 50 tons of food to sustain weight of 150 pounds. A horse’s intestines are about 89 feet long. Did you remember to write your . name. and . date. in the upper right corner of your paper?. Revised 9/13/11. Fold your paper in half and label each side as shown below:. Physical Changes. Chemical Changes. Density. A liquid becomes a gas. .. Burn bacon in the pan. .. Magnetic. Bake . cupcakes. Burning . leaves. Reactivity. Blue Station. Define the following terms.. Matter. Physical Change. Chemical Change. S8P1d. Distinguish between physical and chemical properties of matter as physical (i.e., density, melting point, boiling point) or chemical (i.e., reactivity, combustibility) How are physical and chemical properties different? Physical and Chemical Changes Physical and Chemical Properties Everything around us has physical and chemical properties. Physical Properties Characteristics you can observe without changing the substance into something new.