Molecular Matter

Midway Middle School

Examples of Chemical Change

Produces a new substance

Chemical Change

*Saliva breaking down food during chewing

*Cellular respiration*Burning wood

*Rotting banana*Photosynthesis*Digesting food

Physical Change

*No new substance is formed.*Only affects the appearance.

Examples of Physical Change

*Melting ice*Cutting paper*Dissolving salt

*Chewing food into small food particles

Chemical Changes in matter

Examples of Chemical Changes

*Color change*Heat absorbed or released*Formation of gas

Organic Compounds

*Contain Carbon and Hydrogen*Come from living organisms

Examples:*Sugar (C6H12O6)*Rotting wood

*Paper

How do you differentiate between elements and

compounds?

*Elements are made of only one kind of atom

*Elements are all listed on the periodic table

Examples of elements:Oxygen – O

Iron – FeSodium - Na

How do you differentiate between elements and

compounds?

*Compounds are made of two or more elements chemically

combined

Examples of compounds:Water – H2O

Baking soda – NaHCO3

Carbon dioxide – CO2

Chemical compounds

C6H12O6

*This is the chemical formula for aCarbohydrate

*How many elements are there in a molecule of Carbohydrate? 3

Carbon(C)Hydrogen(H)Oxygen(O)

Chemical compounds

C6H12O6

*Are Carbohydrates an Organic or Inorganic compound?

*Why?Because it contains

carbon(C) and hydrogen(H)

Photosynthesis

*Where does Photosynthesis take place?

Plant cells

Cellular Respiration

*Where does cellular Respiration take place?

Plant and Animal cells