Physical and Chemical Properties and Changes Property Is
- Slides: 34
Physical and Chemical Properties and Changes
Property ►Is a description of an object The tree is GREEN If struck by lighting, the tree could catch FIRE (BURN) The tree is TALL
Physical Properties Are determined by the use of the five. senses ► They are a description of an object. ►
Examples of Physical Properties Color Smell Taste Hardness State of Matter Boiling, Freezing, or Melting Point
Examples of Physical Properties Density Mass Volume Malleability (the ability to be molded) Solubility (the ability to be dissolved)
Chemical Properties ► Are determined by a substance’s ability react to with other substances.
Examples of Chemical Properties • The ability to react with - rust - tarnish - corrode - rot air • The ability to react with water/acids • The ability to catch fire ( flammability )
Physical or Chemical Property? ► Ability of gun powder and fire to explode. Chemical Property
Physical or Chemical Property? ► The color of a sunset. Physical Property
Physical or Chemical Property? ► The ability of a nail to rust. Chemical Property
Physical or Chemical Property? ► The shape of a leaf. Physical Property
Physical or Chemical Property? ► The ability of wood to burn. Chemical Property
Physical or Chemical Property? ► The hardness of a diamond. Physical Property
Physical or Chemical Property? ► The volume of your coke. Physical Property
Physical or Chemical Property? ► The mass of two camels. Physical Property
Physical Changes a change that occurs without changing the identity of the substance. No new substances are formed. ► ____ ►
Examples of Physical Changes ► ► ► Change in size, shape, or color Pencil shavings Torn Paper Crushed ice Sugar dissolved in water Painting a wall
Chemical Changes ► a change that occurs causes that the of a identity substance to change; something new is formed. ► New substances with new properties are formed
Evidence of Chemical Change color • New ____appears • _____ Heat is produced fizzing • Bubbbles or ____ Light is produced • ______ solid material) • Precipitate forms (____ Sound is given off • ______ reverse • Difficult or impossible to _____
Reactions with Acid ► Vinegar + baking soda = release of Carbon Dioxide Gas
Reactions with Oxygen ► OXIDATION ► Iron + Oxygen = rust
Reactions with Electricity ► Silver Plating
Reactions between Substances ► Sodium + chloride = salt ► Silver + sulfer in the air = tarnish
Other Examples ► Wood burning ► Metal rusting ► Food digesting ► Gasoline burning ► Cake baking
Physical or Chemical Change? ► Water evaporates from the ocean.
Physical or Chemical Change? ►The yolk of an egg, which contains sulfur, causes tarnish to form on silver.
Physical or Chemical Change? ►The ice on a lake melts to become water in the lake.
Physical or Chemical Change? ►Charcoal in a fire turns to ash after several hours.
Physical or Chemical Change? ►A pencil is sharpened in a pencil sharpener, leaving behind shavings.
Physical or Chemical Change? ►A battery makes electricity to turn on a flashlight.
Physical or Chemical Change? ►A bicycle rusts when left in the rain.
Physical or Chemical Change? ►A shirt is accidentally torn in the washing machine.
Physical or Chemical Change? ►A log is split in two by an axe.
Your Turn!
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