Substances and mixtures

A pure substance

• Consists of two or more substances mixed together

• Components that cannot be identified

• Consists in a single kind of matter

The two types of mixtures are

• Heterogeneous and pure substances

• Pure substances and homogeneous

• Homogeneous and heterogeneous

A mixture is

• composed a single kind of matter

• consists of two or more substances mixed together

• There are two types of mixtures: Homogeneous and heterogeneous

Check the homogeneous mixture

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Check heterogeneous mixture

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What is a heterogeneous mixture?

• Consists of two or more substance mixed together.

• Is composed of a single kind of matter.

• It is a mixture in which you cannot identify its components easily.

• It is a mixture in which you can identify its components easily.

What is a homogeneous mixture?

• Consists of two or more substance mixed together.

• It is a mixture in which you cannot identify its components easily.

• It is a mixture in which you can identify its components easily.

A physical change ...

• occurs when an object changes but does not become a new kind of matter.

• occurs when an object has new properties.

An example of pysical change is

• Burning wood

• Melting butter

• A cake

• A fried egg

Check the example of physical change

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