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Does It Matter?

Matter is anything that has mass and takes up space. Because there are so many types of matter, it is helpful to use a classification system to categorize the types of matter. The following diagram represents a common type of classification system used for matter.
 
Matter
Anything that takes up space and has mass.
Atom
The smallest particle that has the properties of an element.
Molecule
The smallest unit of a substance that shows the properties of that substance
 

The molecule of water pictured below has three atoms; one Oxygen atom and two Hydrogen atoms.

Click to download the small or large animation.

One drop of water has 390,000,000,000,000,000,000,000 molecules of water in it!

 
A molecule of Carbon Dioxide has one Carbon atom and two Oxygen atoms.
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A molecule of Propane has three Carbon atoms and eight Hydrogen atoms.
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Got it?

Read each of the following descriptions. Determine if they represent the definitions you learned for matter, atom, molecule, or properties. Drag to find your choice for each description. Highlight the box below to check your answers.







 
Highlight the box below to check your answers!
1. Atom, 2. Molecule, 3. Molecule, 4. Molecule, 5. Atom, 6. Molecule

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Teachers should view the Teacher Site Map to relate Sci-ber text and the USOE 7th grade science core.


Updated October 24, 2008 by: Glen Westbroek

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