Blog Post 4, Activity 4

Activity 4:

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:

Protons: 3

Neutrons: 4

Electrons: 3

Density: 0.534 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 the mass per unit of volume. The equation for density is mass/volume=density.

 

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 chose to do the Density-MS activity by Tamara Sneed.

 

 

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.

	Mass (kg)	Volume (L)	Density (kg/L)	Identification
Object A	65.14 kg	3.38 L	19.27 kg/L	gold
Object B	.64 kg	1 L	.64 kg/L	apple
Object C	4.08 kg	5.83 L	.70 kg/L	gasoline
Object D	3.10 kg	3.38 L	.92 kg/L	ice
Object E	3.53 kg	1 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.

A.8.3 Defend explanations and models by collecting and organizing evidence that supports them and critique explanations and models by collecting and organizing evidence that conflicts with them

A.8.6 Use models and explanations to predict actions and events in the natural world

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