1. *Complete sentences only. One word answers will not be accepted for grading* 1. What does the word “atom” mean? 2. List the particles of an atom and their charges volume=0

2.  We know atoms are small, but do we really understand how small they are?  This activity will help you conceptualize how small an atom is so your model can be scaled accurately

3.  Get one sheet of 26cm ticker tape and a pair of scissors 1. Cut the paper in half once 2. Put one half to the side, keep the other half 3. Cut the half you kept into half again 4. Tally each time you cut the new half in half 5. Repeat steps 1-4 until you cannot cut your piece of paper in half anymore 6. Write your group’s tally total on the board Table partner volume level=1

4. Cut 114.0 cm5.5"Child's hand, pockets Cut 27.0 cm2.75"Fingers, ears, toes Cut 33.5 cm1.38"Watch, mushroom, eye Cut 41.75 cm.69"Keyboard keys, rings, insects Cut 6.44 cm.17"Poppy seeds Cut 81 mm.04" Thread. Congratulations if your still in! Cut 10.25 mm.01"Still cutting? Most have quit by now Cut 12.06 mm.002"Microscopic range, human hair Cut 14.015 mm.006" Width of paper, microchip components Cut 18 1 micron.0004" Water purification openings, bacteria Cut 19.5 micron.000018"Visible light waves Cut 24.015 micron.0000006" Electron microscope range, membranes Cut 31.0001 micron.00000000 45" The size of an Atom!

5. 31 cuts= size of an atom 41 cuts= size of nucleus of an atom

6.  What do we know? ◦ An idea of how small an atom is ◦ The particles of atoms ◦ The location and charges of atom particles  What do we need to do? ◦ Synthesize this knowledge to make a 3D model ◦ Let’s start with using ourselves to make a model and review relative positions

7.  This activity must be done in complete silence (atoms do not make noise)  Each of you will be given paper with a charge on it (negative, positive, no charge)  We will build an atom using our bodies as the particle on our paper  When I say go, we will become a live atom!

8.  We have physically been a model, we have learned the particles of an atom, we understand the size of the particles  You and your group are responsible for handing a blueprint or draft of your design for your model by the end of class- work efficiently and volume is at a level 2