Activity # 5: Density

1.
Li: Protons: 3
      Neutrons: 3
      Electrons: 3
      Density: 0.53 g/cm³

Boron:  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 a physical property of matter, as each element and compound has a unique density associated with it. It is the measure of the relative "heaviness" of objects with a constant volume.

            EQUATION:     Density= Mass/Volume g/ml.  

1.      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.

When an object is put into a liquid other than water, will it act differently? 

Start

Google:   Phet buoyancy  sim

:

1.    

2.   Click on the first link

3.   Click on the   button

4.   Have some fun!!  Explore the “buoyancy”

5.   Find the box which allows you to change the liquid-      

 and experiment with the objects.

	6. What did you discover about an object put in water versus put in oil? The items in the water floated higher than in the oil. Tell me two (2) other things you discovered while using this simulation. The objects sink more in the oil than the water. The oil always has a higher volume than the same object in water.

 

2.      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 19.27, Material Gold, Gold's known density is 19.3

Block B:
Mass .64 kg, Volume .64 L, Density 1, Material Water, Water's known density is 1

Block C:
Mass 4.08 kg, Volume 10.20, Density 0.4, Material Wood,  Wood's known density is .40

Block D:
Mass 3.10 kg, Volume 3.10 L, Density 1, Material Water, Water's known density is 1

Block E:
Mass 3.53 kg, Volume 1 L, Density 3.53, Material Diamond, Diamond's known density is 3.535.

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

A.4.2 When faced with a science-related problem, decide what evidence, models, or explanations previously studied can be used to better understand what is happening now.

C.4.2 Use the science content being learned to ask questions, plan investigations, make observations, make predictions, and offer explanations

C.4.5 Use data they have collected to develop explanations and answer questions generated by investigations