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: Protons 3, Electrons 3, Neutrons 4

Density: 0.534 g/cm3

Boron: Protons 5, Electrons 5, Neutrons 6

Density: 2.34 g/cm3

2. Define density and the equation for density and post on your blog.
       Density is an objects mass per unit volume. d= m/v It is the amount of matter in a given amount of space.
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.

Object	Sink (negative buoyancy)	Float (positive buoyancy)	In the middle (neutral buoyancy)
Empty canister with top on		X
Canister filled with water	X
Canister half filled with water			X
Canister with cotton ball		X
Canister with beans	X
Beans	X
Canister with pebbles	X
Wood block		X
Styrofoam ball		X
Rock	X

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.

         A: Mass: 65.14 kg/Volume: 3.38 L= 19.27kg/L Gold

         B:  Mass: 0.64 kg/Volume 1 L= 0.64 kg/L Apple

         C: Mass: 4.08 kg/Volume: 5.83 L= 0.69 kg/L Gasoline

         D: Mass: 3.10 kg/Volume: 3.38 L= 0.91 kg/L Ice

         E: Mass: 3.53 kg/Volume: 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.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
         B.4.1 Use encyclopedias, source books, texts, computers, teachers, parents, other adults, journals, popular press, and various other sources, to help answer science-related questions and plan investigations
         C.4.1 Use the vocabulary of the unifying themes to ask questions about objects, organisms, and events being studied
         C.4.3 Select multiple sources of information to help answer questions selected for classroom investigations
         C.4.6 Communicate the results of their investigations in ways their audiences will understand by using charts, graphs, drawings, written descriptions, and various other means, to display their answer
         D.4.1 Understand that objects are made of more than one substance, by observing, describing and measuring the properties of earth materials, including properties of size, weight, shape, color, temperature, and the ability to react with other substances
         D.4.2 Group and/or classify objects and substances based on the properties of earth materials
         E.4.1 Investigate that earth materials are composed of rocks and soils and correctly use the vocabulary for rocks, minerals, and soils during these investigations