Activity 5 - Visualizing Chemistry

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. 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: .53 g/cm3



Boron


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


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

Definition: The state or quality of being dense; compactness; closely set or a crowded condition (dictionary.com).
Equation:  Density = mass/volume


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.


Relative Density: Sink or Float using Density Simulation
Author: Jackie Esler
Pre-Lab for Density Simulation

Name: Ashley Slinker

1. Will cube A sink or float in water? I think it will float because it is bigger than block B.


 2. Will cube B sink or float in water? I think it will sink because it is bigger than cube A.



3. Will C (a plastic hockey puck) sink or float? C will sink because it is made of plastic.


4. Will D (a metal hockey puck) sink or float? D will sink because it is made of metal.


5. You are given two solid gold bricks (Au). Which properties change from brink #1 to brick #2? The volume and density of the bricks will change.

 6. I love silver (Ag)! I won a contest and the prizewas a life-sized statue of my dog! I pick up my prize worth $6,000! On the way out, I start thinking that it isn’t very heavy for an object of this size made of solid silver. I know it is only a “prize” that I won, but I think it might be made of something other than valuable silver.


How could I find out for sure if this statue is made of solid silver? Find out how much it weighs and find the dollar value for that unit of weight and if it adds up to $6000 then it is silver. Find out silver properties. See if it sinks or floats.

 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
Denisty (M/V): 19.272 kg/L

Block B:
Mass: .64 kg
Volume: .64 L
Denisty: 1 kilograms/L


Block C:
Mass: 4.08 kg
Volume: 4.08 L
Denisty: 1 kg/L


Block D:
Mass: 3.10 kg
Volume: 3.10 L
Denisty: 1 kg/L


Block E:
Mass: 3.53 kg
Volume: 1 L
Denisty: 3.53 kg/L



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


A.4.1 When conducting science investigations, ask and answer questions that will help decide the general areas of science being addressed.

A.4.3 When investigating a science-related problem, decide what data can be collected to determine the most useful explanations

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.4.3 Select multiple sources of information to help answer questions selected for classroom investigations.

C.4.4 Use simple science equipment safely and effectively, including rulers, balances, graduated cylinders, hand lenses, thermometers, and computers, to collect data relevant to questions and investigations.

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

C.4.7 Support their conclusions with logical arguments.