Activity 5

1. Run the Build an Atom simulation http://phet.colorado.edu/en/simulation/build-an-atom and build a neutral lithium atom and a neutral boron atom.  Take a picture, or a screen shot, of these two atoms and place them on your blog.  List the number of protons, neutrons and electrons for each. Also look up and post the density for each of the elements on your blog.

Lithium:  3 Protons, 3 Neutrons, Density--  0.53 g/cm3




Boron:  5 Protons, 6 Neutrons, Density-- 2.34 g/cm3




2. Define density and the equation for density and post on your blog.


There are several definitions for density.  The most appropriate one that I found was mass per unit volume.  Density's equation is mass/volume.

3. Run the Density simulation http://phet.colorado.edu/en/simulation/density and complete one(your choice) of the prepared Teaching Ideas and post your results on your blog. The activity you choose should be one of the student intended activities.

There are many science standards that could be met through these activities.  Completing simple tasks and learning how to incorporate technology into the science world is a big idea that is associated with this site.  When somone is learning and having fun at the same time, it is easier to comprehend information in the future.  This way it is not forced into someone's head.  Children can do it at their own pace and to their own liking.

Name: ___­­­­­­­­­__________________________
Class Period: _____________________________

Floating and Sinking:
Pre Lab Questions:

You have a block, and you see that it floats in water.

What could it be made of?

 It could be made of wood, plastic, styrofaom, or ice

What do you think will happen if you make a bigger block out of the same material?  Will it float or sink?

It will float 

You have another block that sinks.

What could it be made of?

Brick, aluminum, or some type of metal

What do you think will happen if you make a smaller block out of the same material?  Will it float or sink?

It will sink.

                       

Why do you think Block #1 floats and Block #2 sinks?

They are made out of different materials.  Block number one has less mass and less density than block number two.

4. Complete the Mystery Blocks activity on the Density simulation.  Post on your blog the data you collected (mass, volume, and density) and the identification of the material and the known density.


Block A
Mass:  65.14 kg
Volume: 3.38 L
Density:  m/V= 19.27 kg/L

Block B
Mass: 0.64 kg
Volume: 1.00 L
Density:  m/V=0.64 kg/L

Block C
Mass: 4.08 kg
Volume: 5.83 L
Density: m/V=0.69 kg/L

Block D
Mass: 3.10 kg
Volume: 3.38 L
Density: m/V=0.92 kg/L

Block E
Mass: 3.53 kg
Volume: 1.00 L
Density: m/V= 3.53 kg/L




5. Identify and post on your blog the Science Standards that could be met through these activities completed in Activity 5