Activity 5

To complete Activity 5, complete the tasks below:
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: 3
Electrons: 3
Density: .534 g/cm3

Boron:
Protons: 5
Neutrons: 5
Electrons: 5
Denisity: 2.34 g/cm3

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

Density is mass per unit volume. 
The equation of density is mass divided by volume: d=m/v


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.


Prelab Questions:

Name: Tiffany Haas___­­­­­­­­­__________________________
Class Period: _____________________________

Floating and Sinking:
Pre Lab Questions:

You have a block, and you see that it floats in water.

What could it be made of?

Ice

What do you think will happen if you make a bigger block out of the same material?  Will it float or sink?

Float

You have another block that sinks.

What could it be made of?

Aluminum

What do you think will happen if you make a smaller block out of the same material?  Will it float or sink?

Sink                 

Why do you think Block #1 floats and Block #2 sinks?

Block 1 floats because it is less dense than block 2.

Post Lab Questions:

 

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.

Column1	Column2	Column3	Column4	Column5	Column6
Blocks	Mass (kg)	Volumne (L)	Density (kg/L)	Identification of material	Know Density of Material Identified
A	65.14	3.38	19.27	Gold	19.3
B	0.64	0.64	1	Water	1
C	4.08	4.08	1	water	1
D	3.1	3.1	1	water	1
E	3.53	1	3.53	Diamond	3.53

5. 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. 4.2 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.

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

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


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