1. Warm Up : (Date)Matter: Elements Session 3
Using the Scientific Method, In Ziploc Bag vs. Pencil, State the:
Purpose
Hypothesis
Experiment
Analysis
Conclusion
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3. Ziploc Bag vs. Pencil Vs. What’s the question you want answered?
What do you know about ziploc bags, pencils, sharp objects and soft ones?
What do you think will happen? When I…
What’s the procedure to test it?
Now what?
What’s your conclusion?

4. .
Explanation
Plastic is made of long chains of molecules. These are called polymers. This is what makes the plastic in the bag stretch. Putting the pencil through the polymers simply pushes them to the side. Their flexibility allows them to continue to form a strong seal around the pencil.

5. Everything in the universe is either matter or energy
Everything in the universe is either matter or energy. If something has mass and takes up space, it is ________. If it is able to make changes happen, it is _________.
Some types of energy are _______, _______, and _______.
All matter is composed of _______.
Atoms, therefore, must have _________ and _______________ .
Any material that is composed of only one type of atom is called an __________.
Atoms are the __________ part of an element that remains (circle one) identical different to all other particles.
There are more than _____(#)different types of atoms.

6. Label The Parts of this Atom

7. The number of protons in the nucleus of an atom is called the atomic number.
The atomic number determines what element the atom is.
Because all of the atoms in an element are the same; they all have the same number of protons. 
The atoms of one element are different from those of all other element because they have different numbers of protons.
The number of protons + the number of neutrons = the atomic weight.
Elements are different because they have different atomic weight.

8. The term element is used to describe atoms with specific characteristics.
An element is the simplest pure substance made of only one kind of atom and has definite properties.
Physical properties help identify matter. Some properties are easily observable, such as color, shape, odor, and texture. Other properties, such as mass, volume, and temperature, can be measured using tools. Some properties cannot be observed or measured directly. These, like density, must be calculated.

9. Periodic Table of Elements Song

10. The quest for an organized arrangement of the elements started with the discovery of individual elements.
In 1869, Russian chemist Dimitri Mendeleev proposed arranging elements by atomic weights and properties.
The table contained gaps but Mendeleev predicted(correctly) the discovery of new elements.

11. Over the centuries, scientists have worked to organize all the known elements of the universe into a specialized chart called the: Periodic Table of Elements.

12. Chemical symbols are used to represent each element.
The chemical symbol for each element is a shorthand
method of writing the name.

13. There are over _______elements on the Periodic Table.
(Date)Matter: Elements Session 3
Reflection:
The Periodic Table is used by scientists all over the world to __________ the ___________.
There are over _______elements on the Periodic Table.
Most are found in _________, but others were created by _________ in labs.
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15. Homework Finish Coloring the Periodic Table (Handout)
You should already have the Key done.
Use the Web to help you, if needed