​Lesson Objectives

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• We will learn that in a chemical change we form an entirely new substance.

• We will learn in a physical change, we don't form a new substance.

• We will learn that Physical changes also occur when matter changes states.

​Vocabulary

​catalyst. A substance that speeds up a chemical reaction.

​chemical change: A type of change in which a new substance is formed. For example: burning something.

​physical change: A type of change in which a new substance is NOT formed. For example: water boiling.

​oxidizer: A chemical that provides a lot of oxygen to help things burn.

​carbon dioxide: A gas without any color or smell that is commonly found in soda. It is also called CO2 and comes out the back of a car or bus that is running.

​hydrogen: A gas less dense than air that has no color or smell. It is extremely flammable meaning it can burn

​States of Matter: The main forms matter can exist in: Solid, Liquid and Gas (also plasma but that is less common on earth).

​Questions Before the Video

How are chemical changes different from physical changes?

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​How are chemical changes different from physical changes?

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Is toasting a piece of bread an example of a physical or chemical change?

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When the banana, berries, water and hot dog are blended, does a physical or chemical change occur? Why?

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Is water evaporating an example of a physical or chemical change?

​Chemical changes happen when substances change to form new ones, while physical changes do not form any new substances.

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​Heating bread in a toaster is a chemical change. The surface of the bread burns, forming a new substance

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Blending the banana, berries, water and hot dog chops them up into tiny pieces, but doesn’t create a new substance. Therefore, it is an example of a physical change.

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​Evaporation means to turn a liquid into a gas. Water in gas form is not a new substance (it is still water) so that makes it a physical change.