Saturday, August 3, 2013



Activity 8: Integration of Knowledge and Application to Teaching

1.       Work with any of the Chemistry Simulations and/or develop a demonstration to create your own Teaching Ideas. The criteria for this is as follows:

a.       Must Identify and meet three next generation science education standards within the K-12 grade band.

·   2-PS1-1. Plan and conduct an investigation to describe and classify different kinds of materials by their observable properties.

·   2-PS1-2. Analyze data obtained from testing different materials to determine which materials have the properties that are best suited for an intended purpose.

·   3-PS2-3. Ask questions to determine cause and effect relationships of electric or magnetic interactions between two objects not in contact with each other.

b.      Must be original work.

·   The Teaching Idea that I decided to go with is magnets and materials. For this lesson I would have magnets for all the children and 10 different objects that they will first predict if it is magnetic or not magnetic. As soon as they are done making their predictions they will then take each object and test their prediction. Each student will have a worksheet where they can record their prediction and their answers.

c.       Must be scientifically accurate and appropriate for the directed grade level.

·   Second Grade

d.      Must have an accompanying worksheet with at least 7-10 questions related to each activity/simulation. Answering these questions should be related to meeting the science standards identified.

·    
 

 

2.       How do you feel your understanding of science, and chemistry in particular, has changed due to your experiences in this class?

·   When going into this class I was a little nervous, because Chemistry has never been an easy subject for me, but this class was definitely not what I was expecting. All of these experiments were easy to relate to and easy to conduct as well. You never really know how much chemistry is around you and taking this class got me to notice that and made me more interested in the experiments that we did. The simulations were a great tool for me to understand for example the liquids, solids, gases, and states of matter in a way that I could fully understand what I was really doing.

3.       What was the most challenging concept covered and why?

·   I think that my most challenging concept covered is the Acids and Bases Activity because that is something that I have never truly understood why the acids are acids and why the bases are bases. The basics were easy for me to understand even before this class, but when it got down to understanding the technical definition and aspects of this activity, it was a little difficult for me, but as the activity went on it was great. The simulation helped a lot too.

4.       How could you facilitate future learning to your students who might also find learning about science and chemistry challenging?

·   Being and Early Childhood Education major I will be covering a lot of the basic chemistry points. What has always been important to me as a student learning to educate young children properly and positively has been the students learning by doing. Hands on activities are important to me and allows the children to be creative and where they get a little room to experiment. Knowing that Chemistry was never really my strong point even when I was younger really makes me want to make it enjoyable for those students who might find it challenging just like I did. So I think it is important to be aware of those students and make it so that they are taking away just as much information as any other student.

5.       As you think about your future in education, give three ways you think you’ll be able to implement the skills you’ve learned in this class.

1.       Learning by doing. Like I said above I think that is a great way to learn and that it is also important. The more hands on the students are the better. When teaching young children I know that they will have a hard time sitting in their desks listening to me talk and talk, so experiments like we have done in this class would definitely be something I will implement.

2.       Don’t be afraid to ask for help. There were questions that I had during this class and getting help is not a bad thing. Implementing that in my classroom will be important to me because I want my students to be comfortable in asking questions that they may have when dealing with something that they are not sure about.

3.       Using the simulations. Like before I had said that the simulations really helped me to get a better understanding of how some of the experiments worked. Using simulations in a classroom is a great way for some students to learn, because they all learning differently.

 

 

 


Activity 7: Gases




1.       Complete the Clicker Questions on Gas Laws in the Teaching Idea “Concept Questions for Chemistry using PhET” posted by Trish Loeblein. Use the PhET simulation Gas Properties to help answer the questions. On your blog post the answers with you scientific explanations to these questions.

1)      There are 2 balloons in a room. They are identical in size and material. One balloon is filled with air and the other balloon is filled with Helium. How does the pressure of the air balloon compare to the pressure of the Helium balloon. The pressure in the air balloon is?

                                                               i.      C: Greater, the air is denser which causes more pressure.

2)      How does the pressure in the Helium balloon compare to the pressure of the air in the room? The pressure in the Helium balloon is?

                                                               i.      A: Less, There is less pressure in the helium balloons.

3)      How does the number of air molecules in the air balloon compare to the number of He atoms in Helium balloon? The number of air molecules is?

                                                               i.      A: Less, Air molecules take up more space, it takes less air molecules to fill up space than helium molecules.

4)      How does the average speed of the Helium molecules compare to that of the air molecules? The average speed of the He molecules is?

                                                               i.      C: Greater, The helium molecules are smaller which causes them to move faster.  

5)      What will happen to the pressure if temp is held constant and the volume is decreased?

                                                               i.      B: Pressure goes up because more collisions are happening, but same force per collision, Boyle’s Law states that at constant temp. the volume of a gas is inversely proportional to its pressure.  

6)      You are flying from Denver to Boston, and you bring along a ½ full bottle of shampoo that was well sealed before you left Denver. You land in Boston and proceed to your hotel. The number of air molecules within the shampoo bottle?

                                                               i.      B: Has stayed the same, the bottle was sealed which caused it not to affect the number of molecules in the bottle.

7)      If the walls of the shampoo bottle are strong and rigid so that the bottle has the same shape as before you left, how does the pressure of the air inside the bottle compare to the pressure of the air in Denver?

                                                               i.      B: Equal to, the air pressure will remain the same.

8)      How does the pressure inside the bottle compare to the pressure of the air in Boston?

                                                               i.      A: Less than, The pressure in Denver is lower than in Boston, Denver has a higher altitude.

9)      If you had a water bottle with very soft sides. When you open your suitcase in Boston, the bottle would look?

                                                               i.      A: Squished, The pressure in the air is greater than the pressure in the bottle.

Tuesday, July 30, 2013


Activity 6: Acids and Bases

1.       Complete the Teaching Idea “Concept Questions for Chemistry using PhET” posted by Trish Loeblein on the pH Scale simulation. On your blog post the answers with your scientific explanations from the “Clicker Questions pH Scale” posted by Trish.

1.       The color of a solution identifies if it is an acid, base, or neutral solution. True or False

o False: pH determines if it is a base, acid, or neutral.

2.       Which solution is basic?

o D. More than one which is both B & C. Both are above a pH of 7

3.       Which Solution is acidic?

o C. High Level of H30+ shows that it is acidic

4.       Which solution is basic?

o B. the pH = 13-

5.       Which solution is acidic?

o D. More than one which is both A&B

6.       How will adding water affect the pH?

o A. Increase the pH

7.       How will equal amount of water affect the pH?

o B. Decrease the pH

8.       What is the order from most acidic to most basic?

o A. ABC lower the pH higher acidity, higher pH more basic

9.       What is the order from the most acidic to most basic?

o C. BAC lower the pH, higher acidity

10.   If spit has a pH=7.4 what does that tell you about the water equilibrium?

o A. Something was added that made the equilibrium shift left


2.       Complete the Teaching Idea “Intro to Strong and Weak Acids and Bases” posted by Chris Bires on the Acid-Base Solutions simulation and post on your blog your data and answers to the questions posed.



Activity 5: States of Matter and Intermolecular Forces

1.       Convert

o   0°F= 255.4K

o   32°F=273.15K

o   70°F=294.26K

o   212°F=373.15K

2.       Complete the Teaching Idea: States of Matter Simulation Lab by Kelly Vaughan. Complete the lab worksheet as if you were a student, and then post this on your blog.

o    
 
 
 


3.       In the States of Matter simulation, choose the Solid, Liquid, and Gas Tab at the top of the screen. Choose the water molecule and cool the water to 0 K. Describe how the water molecules are aligned and attracted to each other. Which atoms are attracted to which other atoms?

o   The hydrogen atoms are attracted to the oxygen atoms on all of the molecules.

4.       Switch to the Phase Changes Tab on the States of Matter simulation. Notice how on the bottom right there is a small red dot that indicates where the system is at as far as temperature, pressure and state of matter. Play with the simulation to notice changes, notice that when you push down the pressure can go way up and explode the box. On your blog, report a temperature and pressure required to make oxygen a liquid. This is sometimes how the oxygen exists in pressurized oxygen tanks, perhaps like ones you may use to go diving.

o   It can be possible for the pressure to be around 3 ATM and a temperature of 112K.

5.       List and describe at least two Science Standards that this activity addresses.

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

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

Sunday, July 21, 2013

Activity 4: Density 

1. Run the Build an Atom simulation and build a neutral lithium atom and a neutral boron atom. Take a picture, or a screen shot, of these two atoms. 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.

o   Lithium: 3 Protons, 4 Neutrons, 3 Electrons, Density is .53g/cm3



o   Boron: 5 Protons, 6 Neutrons, 5 Electrons, Density is 2.34 g/cm3



2. Define density and the equation for density.
o   The density of a substance is the quantity of mass per unit of volume. D=M/V


3. Run the Density simulation and complete one activity of the prepared Teaching Ideas and post results.

 Name: Ashley Weimar
Density
Introduction:  Density is a physical property of matter that is calculated by dividing the mass of an object by its volume.  Volume can be computed for a regular object by multiplying length x width x height.  Another way to compute volume is by submerging an object into a liquid.  You must record the starting volume of the liquid and the final volume after the object has been submerged.  Then subtract the starting volume from the final volume. 

Procedure:
  • Open the internet browser and enter the address:  http://phet.colorado.edu
  • Click on “Play with Sims” and select “Chemistry” from the menu on the left.
  • Open the “Density” Simulation and select “Run Now”

Objectives:
  • Describe how the concept of density relates to an object's mass and volume.
  • Explain how objects of similar mass can have differing volume, and how objects of similar volume can have differing mass.
  • Measure the volume of an object by observing the amount of fluid it displaces.
  • Identify an unknown material by calculating its density and comparing to a table of known densities.

Investigate:

1.       On the Blocks menu (top right) select Same Mass. 
2.      One at a time, take a block, lower it into the liquid, and record its volume.  If it floats, you will need to hold it under the water to record its volume.  Then compute each block’s density.

Blue:      Mass is 5kg
                Volume is 5L
                =1kg/L

Yellow: Mass is 5kg
                Volume is 10L
                =.5kg/L

Green:  Mass is 5kg
                Volume is 2.50L
                = 2kg/L

Red:       Mass is 5kg
                Volume is 1.25
                =4kg/L

3.       Repeat for Same Volume.
Blue:      Mass is 6kg
                Volume is 5L
                =1.2kg/L

Yellow: Mass is 8kg
                Volume is 5L
                =1.6kg/L

Green:  Mass is 4kg
                Volume 5L
                =.8kg/L

Red:       Mass is 2kg
                Volume is 5L
                =.4kg/L

4.       Repeat for Same Density
Blue:      Mass is 3kg
                Volume is 3.75L
                =.8kg/L

Yellow: Mass is 4kg
                Volume is 5L
                =.8kg/L

Green:  Mass is 2kg
                Volume is 2.50
                =.8kg/L

Red:       Mass is1kg
                Volume is 1.25L
                =.8kg/L

5.       Repeat for Mystery. This time you will also have to take the mass of each object. After computing the density, select Show table and identify each object.
IDENTIFICATION
A:            Mass is 65.14 kg                                                                         Gold
                Volume is 3.38L
                =19.27kg/L

B:            Mass is .64kg                                                                              Apple
                Volume is 1L
                =.64kg/L

C:            Mass is 4.08kg                                                                         Gasoline
                Volume is 5.83L
                =.70kg/L

D:            Mass is 3.10kg                                                                              Ice
                Volume is 3.38L
                =.92kg/L

E:            Mass is 3.53kg                                                                           Diamond
                Volume is 1L
                =3.53kg/L
                

  4. (mass, volume, and density) and the identification of the material and the known density.
o   Gold
·   Mass: 65.14kg
·   Volume: 3.38L
·   Density: 19.27kg/L
o   Apple
·   Mass: .64kg
·   Volume: 1L
·   Density: .64kg/L
o   Gasoline
·   Mass: 4.08kg
·   Volume: 5.83L
·   Density: .70kg/L
o   Ice
·   Mass: 3.10kg
·   Volume: 3.38L
·   Density: .92kg/L
o   Diamond
·   Mass: 3.53kg
·   Volume: 1L
·   Density: 3.53kg/L

5.    Identify the Science Standards that could be met through these activities.
o   A.4.1 When conducting science investigations, ask and answer questions that will help decide the general areas of science being addressed.
o   C.4.5 Use data they have collected to develop explanations and answer questions generated by investigations.
o   C4.6 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.

o   C8.8 Use computer software and other technologies to organize, process, and present their data.