|Physical Science||Matter 8A1.00||Process Of Science||Analyzing 1.4 ac|
CONTENT STANDARD: Physical Science
CONTENT TOPIC: Matter
CONCEPT: All matter has a definite structure which determines physical and chemical properties.
CONTENT OBJECTIVE: 8A1.00 To understand the chemical and physical properties of matter
INSTRUCTIONAL OBJECTIVES: The learner will:
TN COMPONENT OF SCIENCE: Process Of Science
BENCHMARK: Information is organized into simple tables and graphs to identify relationships.
1.4c Scientific investigation may not produce concrete solutions.
BENCHMARK: There may be more than one good way to interpret a given set of findings.
Any slight change in these physical properties brings about physical changes such as when ice melts. The substance changes size, shape or state, but does not change into a new substance with new properties. One of the most common examples of a physical change is the melting of ice. Ice is solid H20; when it melts, it becomes liquid H20.
Chemical properties are those properties a substance possesses because of its action or lack of action with other substances. Reaction with an acid, or reaction with oxygen (combustion) are just a couple of examples of chemical properties.
Studying chemical properties is usually done when chemical changes are observed. A chemical change is a change in which one or more new substances with new properties is formed. When paper is burned, the ashes formed are entirely different from the original paper that was burned.
Chemical and physical properties and changes are characteristic of every substance. See if you can identify the following as physical or chemical by creating a chart and marking each example under the proper category:
1. tearing a piece of paper (Physical)
2. burning wood (Chemical)
3. a candle 5 inches long (Physical)
4. boiling water (Physical)
5. adding hydrochloric acid to zinc (Chemical)
1. Dissolve a small amount of salt in water. Is this a chemical change or a physical change? (Physical) Allow the solution to evaporate. Is this a chemical or physical change? (physical)
2. Add a small piece of zinc to 5 ml of hydrochloric acid. Is the reaction a chemical or physical change? (Chemical)
3. Burn a small piece of Mg ribbon by holding it with tongs in a flame until it catches fire. Do not observe directly. Is the change a chemical or physical one? (Chemical)
4. Put a small nail into a bottle of Coke and leave it for one week. Is the change a chemical or physical one? (Chemical)
5. Light a candle and allow it to burn five minutes. Extinguish. Is the change in the candle physical or chemical? (Physical)
chemical property - a property that describes how a substance interacts or fails to interact with another
physical change - a change in size, shape, or state that does not result in the formation of a new substance
physical property - a property that relates to an object's size, shape, or state. These are determined by the senses.
property - a set of characteristics that may help to identify the substance
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