Jake+DeAngeles





1. Look at your notes, text, or Internet to find out what these four terms mean: Physical Property, Chemical Property, Physical Change, Chemical Change 2. Find and copy 4 pictures to your : 1 showing a physical property, 1 showing a chemical property, 1 showing a physical change, 1 showing a chemical change. 3. Place the images on your wiki page under the heading "**ASSIGNMENT 1: Physical and Chemical Properties and Changes**" and include a 1-2 paragraph explanation like my example below.
 * **ASSIGNMENT 1: Physical and Chemical Properties and Changes**
 * Note: each image is worth 3 points and each correct sentence is worth 2 points for a total of 20 points**.


 * NOTE: Below is an example to help guide you. However, you must come up with your own new creative idea, images, explanation.**



A physical change takes place without any changes in molecular composition. A change change would be a leaf changing a different color.The same element or compound is present before and after the change. The same molecule is present through out the changes. Physical changes are related to physical properties since some measurements require that changes be made.Physical property can be observed or measured without changing the composition of matter. Physical properties are used to observe and describe matter. Chemical property of matter describes its "potential" to undergo some chemical change or reaction by virtue of its composition. What elements, electrons, and bonding are present to give the potential for chemical change.Chemical Change alters the composition of the original matter. Different elements or compounds are present at the end of the chemical change. The atoms in compounds are rearranged to make new and different compounds.

A **physical change** takes place when the car is painted black. The plastic body of the car is still the same substance after the color is changed. We could even melt that plastic into a liquid, and it would still be the same substance because a phase change is also considered a physical change. See the thing is, as long as the chemical composition remains the same, a chemical change has not occurred.

other physical properties include: size, shape, texture, odor, etc. Corrosivity is a **chemical property** of acid rain water.

When acid rain water reacts with certain metals, a **chemical change** takes place (rusting) and the acid rain + metal forms a **new substance** (rust). Other chemical properties include: flammability, reactivity, pH balance, etc.

Here is the balanced chemical equation showing that Iron, Oxygen, and Water react to form a new substance....rust. 4Fe + 3O2 + 6H2O ---> 4Fe(OH)3