Activity 5: 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.

·         Lithium

o   Protons: 3

o   Neutrons: 3

o   Electrons: 3

o   Density: 0.534 grams per cubic centimeter (g/cm³⁾

     

      

  

·         Boron

o   Protons: 5

o   Neutrons: 6

o   Electrons: 5

o   Density: 2.36 g/cm³

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

·         Density is defined as the quantity of mass per unit volume. The equation for solving density is density = 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.









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.

Sample	Volume (L)	Mass (kg)	Density (kg/L)	Identification of material	Known density
A	3.39 L	65.14 kg	19.22 kg/L	Gold	19.3 kg/L
B	0.64 L	.64 kg	1 kg/L	Water	1.00 kg/L
C	4.08 L	4.08 kg	1 kg/L	Water	1.00 kg/L
D	3.10 L	3.10 kg	1 kg/L	Water	1.00 kg/L
E	1.00 L	3.53 kg	3.53	Diamond	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

·         Science Performance Standard A

o   Grade 4: A. 4.3 When investigating a science-related problem, decide what data can be collected to determine the most useful explanation

o   Grade 8: A. 8.1 Develop their understanding of science themes by using the themes to frame questions about science-related issues and problems.

·         Science Inquiry Performance Standards Standard C

o   Grade 4: C.4.5 Use data they collected to develop explanations and answer questions generated by investigations

o   Grade 8: C.8.1 Identify questions they can investigate using resources and equipment that have available

o   Grade 8: C.8.8 Use computer software and other technologies to organize, process, and present their data