Physical and Chemical Properties

Physical and Chemical Properties

Properties of Matter

All substances have properties that we can use to identify them. There are TWO basic types of properties:

PHYSICAL properties and CHEMICAL properties

• Does not change the identity or composition of matter

• ​Observed with senses or measurements

PHASE CHANGES are physical, since only the speed, spacing, and attraction of particles are altered.

Physical Properties

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​Examples of Physical Properties

• magnetism​

• boiling point and freezing point

• density, mass, and volume

• viscosity (how thick a liquid is)

• size, shape, and color

• texture

• ​conducts electricity

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• Describes how the substances may change when it transforms through a chemical reaction​ (reacts with another substance)

• Changes the identity of the original substance​

​Chemical Properties

Chemical changes can't be "undone", since the substance has changed into something new!

​Examples of Chemical Properties

• reactivity (reacting with other chemicals)

  • Signs of a chemical reaction to look for:

    • Release of heat or light

    • Color change

    • Formation of a gas

    • ​Formation of a precipitate (solid falling out of a liquid)

• pH (measuring how acidic or basic a solution is)

• flammability (how likely to burn)

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Multiple Choice

You measure the DENSITY of a rock compared to water.

• physical property

• chemical property

Multiple Choice

A candle burning because the wick is flammable.

• physical property

• chemical property

Multiple Choice

The powder is blue.

• physical property

• chemical property

Multiple Choice

When the two substances combined, a reaction happened causing bubbling and fizzing.

• physical property

• chemical property

Multiple Choice

Water boils at 100 degrees Celsius.

• physical property

• chemical property

Multiple Choice

You dip a pH strip into a liquid and the color changes to blue, showing a strong base.

• physical property

• chemical property

Multiple Choice

You connect a substance to a battery to see if it conducts electricity.

• physical property

• chemical property

Multiple Choice

Water freezes at 0 degrees Cels

• physical property

• chemical property