Monday, January 20, 2014

Activity #6

1. 0 degrees F= 255.37 degrees K
32 degrees F= 273.15 degree K
70 degrees F= 294.26 degrees K
212 degrees F= 373.15 degrees K

2.Name:             Molly Brion                                                                Date:               1/20/14                    
Class:                                                                                      States of Matter Simulation Lab

States of Matter Simulation Lab

Before you open the simulation:

PREDICT
1. Draw a diagram below showing what you think the molecules will look like for each state of matter, solid, liquid, and gas. Write a sentence below each diagram predicting what the motion of the molecules will be like.


Solid
Liquid
Gas
Diagram of molecules

 










Sentence explaining how molecules will be moving.
 They will remain close together and hardly move.
They will be separate and will take the shape of the container.
They will bounce around throughout the container.

2. If you start with a substance as a solid, what will happen to the molecules as you add thermal energy (heat)? It will turn into a liquid and eventually turn into a gas- as the temperature rises.                                                                                                                                                                             
ONCE YOU HAVE COMPLETED THIS PAGE, YOU MAY BEGIN THE SIMULATION.
Open the simulation. You will find it in a folder on your desktop labeled “States of Matter Simulation.”

INVESTIGATE:

3. Use the menu on the right side of the program to select Water and Solid. Draw and describe what you see in the space below.

Diagram
Description










The molecules are bouncing around and are sticking together.  They seem to be vibrating or shaking.

4. Now, use the slider on the bottom of the program to Add Heat. Notice the thermometer at the top of the program. What temperature scale is this thermometer showing?         Kelvin                        

5. What happens to the water as you increase the temperature?          The molecules spread out and begin to separate and sporadically move.  Turning into a liquid and gas.                                                                                                                                                                                                                                                                                                                                                                                          

6. What is the melting/freezing point of water in Kelvin?   373.33 K, 273.15 K           
7. Add heat until the temperature is just below and then just above the melting point of water. How is water different below its melting point and above it?     They both act about the same.                                                                                                                                                                               

8. Draw and describe what water looks like as a liquid.

Diagram
Description









They are bouncing around quickly in a group- like structure.


9. What is the boiling/condensation point of water in Kelvin?   373.15 K

10. Continue to add heat until you are just below and then just above the boiling point of water. How is water different below its boiling point and above it?       They seem to appear to be about the same.                                                                                                                                                         
11. Draw and describe what water looks like as a gas.

Diagram
Description









The molecules are bouncing around, and not clumped together at all.

12. Choose one of the other three substances listed in the menu on the right. Investigate what happens when you add and remove heat from this substance. Use the buttons on the right to see this substance as a solid, liquid, and gas. Draw and describe its properties in the table below.

Substance Selected: Neon                                                  


Solid
Liquid
Gas
Diagram of molecules


 









Sentence explaining how molecules are moving.
The molecules are in a square shape and bouncing together.
The bouncing is faster but they are still somewhat in a clump.
They have separated and are bouncing around more quickly.






ANALYZE:

13. How was this substance similar to water in each state of matter? How was it different?                                     As a solid, Neon was more tightly compacted than water was. As a liquid, Neon did not shake as much and wasn’t as spread out as water.  As a gas, Neon was moving much more slowly than water was shaking and more spaced out as well.                                                                                                                                                                                                                                                         

14. Were your predictions (see p. 1) correct or incorrect? Explain.      My predictions were correct because I knew that solids wouldn’t be moving as much as liquids and gases.                                                                                                                                                                                                     

BONUS: Optional, worth up to 10 points added to the lab’s final grade

15. Choose a substance other than water from the menu on the right side of the program. Use the slider to add and remove heat. Based on what the molecules do, figure out the approximate temperatures of the melting point and boiling point of this substance. (Hint: The temperatures given when you click solid, liquid, and gas are NOT the melting and boiling points.)

Substance:      Argon                                    

Melting Point:            92 K                           

How did you figure it out?   It looked like it started to change into a liquid by separating and moving around and quicker.                                                                                                              

Boiling Point:                         199 K                         

How did you figure it out?   The molecules are completely spread out and moving around everywhere.                                                                                                                                                   

3. The Hydrogen atoms all connect to one another.
4. Temperature: 493 K Pressure: 19-20 ATM
5.
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 answers

We used charts and drawings to display what was happening with the solids, liquids, and gases.

D.4.5 Construct simple models of what is happening to materials and substances undergoing change, using simple instruments or tools to aid observations and collect data

The website we used had simulations so that we could easily see what was happening with the different states of matter.

Activity #5

#1. Lithium: 3 protons
                   3 neutrons
                   3 electrons
     Density:  0.534 grams per cubic centimeter
Boron:        5 protons
                  5 neutrons
                  5 neutrons
      Density: 2.37 grams per cubic centimeter
 Boron
  Lithium

2. The degree of compactness of a substance is density- density= mass/volume
3 and 4.  Guide for Density Simulation:                               Name: _Molly Brion________________
(note: “sink” means stays on the bottom)MC900432481[1]
Google:   Phet Density sim
 
Start:    1.                                                 
              2.           Click on the first link
     3.           Click on the   button
     4.          Experiment with choosing a material:
    material
S=sinker
F=Floater
Density given
Styrofoam
F
.89 kg
Wood
F
2.62 kg
Brick
S
6.01 kg
Ice
F
13.08 kg
Aluminum
S
17.66 kg
MC900432579[1]Put the materials in the correct boxes
 


5.    Try to get aluminum to float.      Talk with your partner about this possibility- can you change the mass of the aluminum block without changing the volume of the aluminum block?  No, the aluminum block will not float.
6.    What do you and your partner notice about the density triangle at the bottom of the box?  Why do you think this does or does not move? It stays the same because the density of aluminum is the same and it doesn’t change.
                                            
7.                          How does the density of aluminum (2.70 kg/L)  help explain what you see?
MC900432579[1]_No matter what you end up changing the density will end up being 2.70 kg/l after you divide the mass by volume.



Frame:  The aluminum will __sink_____________ in the water because the density of the aluminum is _2.70______kg/L and the density of water is ___1.00______kg/L_.  We have learned that _the mass and volume can change but the density will not.______

8.   MC900432579[1] Density  = ----------       “_mass______ over _volume_____ equals ___density____________”

In the “Blocks” box, click on Mystery:
 Test the boxes in the water- just drag and drop!!! 

 
   
When you have determined which ones sink and float, fill in the data table for each box. 

   Sample
Starting volume of water (A)
volume of water and block (B)
Volume of block alone
(difference B-A)
Mass (kg)
Density (kg/L)
What is it most likely made of? (hint: use Show Table for help)
  A
100-L
103.38 L
3.38 L
65.14 kg
19.22 kg/L
Gold
  B
100-L
100.64 L
.64 L
0.64 kg
1 kg/L
water
  C
100-L
104.08 L
4.08 L
4.08 kg
1 kg/L
water
  D
100-L
103.10 L
3.10 L
3.10 kg
1 kg/L
water
  E
100-L
101.00 L
1.00 L
3.53 kg
3.53 kg/L
diamond
9. 
 Look closely at green box C and red box D and discuss your observations.
 List three observations you made while comparing the two boxes.

1st observation
C floats higher
2nd observation
C is a larger object
3rd observation
C weighs more

10. Dear Students,
I am going to build a boat.  My partner says I cannot put a refrigerator and a television in my boat because that would make it too heavy-and the boat might sink. Then we would be swimming with the sharks!!!!

What would you advise me to tell my friend? Is she right or wrong?  Be sure to give me some evidence based on what you learned from the boxes or other places in this activity.
___Make you’re your boat is big enough to hold up the weight of the refrigerator and t.v.  
…you can write on the back if you need more room to write!       Signed, your teacher

5. A.4.3 When investigating a science-related problem, decide what data can be collected to determine the most useful explanations
A.4.4 When studying science-related problems, decide which of the science themes are important
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
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 answers
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