Blog Activity 4: Density

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. 

                Neutral Lithium Atom:

                                Protons: 3
                                Neutrons: 4
                                Electrons: 3
                                Density: 0.534 g/cm3

   

                            

                Neutral Boron Atom:

                                Protons: 5
                                Neutrons: 6
                                Electrons: 5
                               Density: 2.34 g/cm³

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

                Density is the mass per unit of volume.
                                Density=          Mass        
                                                  Volume 

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

 

                I did the Density and Buoyancy activity by Milton Johnson. It is included below.

 

 

 

 

 

 

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.

Material	Mass (kg)	Volume (L)	Density (kg/L)	Identification
A	65.14 kg	3.38 L	19.27 kg/L	Gold
B	0.64 kg	1.00 L	0.64 kg/L	Apple
C	4.08 kg	5.83 L	0.7 kg/L	Gasoline
D	3.10 kg	3.38 L	0.92 kg/L	Ice
E	3.53 kg	1.00 L	3.53 kg/L	Diamond

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

C.8.1 Identify* questions they can investigate* using resources and equipment they have available  

C.8.3 Design and safely conduct investigations* that provide reliable quantitative or qualitative data, as appropriate, to answer their questions  

C.8.5 Use accepted scientific knowledge, models*, and theories* to explain* their results and to raise further questions about their investigations*  

C.8.8 Use computer software and other technologies to organize, process, and present their data  

             D.8.1 Observe, describe, and measure physical and chemical properties of elements and other substances to identify and group them according to properties such as density, melting points, boiling points, conductivity, magnetic attraction, solubility, and reactions to common physical and chemical tests

                D.8.2 Use the major ideas of atomic theory and molecular theory to describe physical and chemical interactions among substances, including solids, liquids, and gases

                D.8.3 Understand how chemical interactions and behaviors lead to new substances with different properties