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Inorganic Online Test Periodic Table

December 16, 2014

Here is the Periodic Table Inorganic Test . Good luck and feel free to use your Flynn Scientific Table to assist you as well as the Dynamic Periodic Table . read more

Inorganic Chemistry Data Analysis

December 16, 2014

In a spreadsheet, gather information form the six natural occurring isotopes of Lead from the dynamic periodic table under isotopes tab. List the atomic mass and percent abundance for the isotopes (you can ignore any with 0.0% . . . read more

Inorganic Article Periodic Table

December 16, 2014

Use the following article to address the use of these elements and categories to form a paragraph summarizing the article. 1. What elements are needed to find if biomolecules exist on Mars? 2. Are scientists looking for metal, . . . read more

Chem Comm Water Article

October 30, 2014

Read the article and answer in a paragraph or two the following questions: Seagras s 1) What are four reasons that seagrass is important? 2) How is sulfur analyzed by scientists? 3) What does the bacteria do to the . . . read more

Pressure Conversion Chart for Inorganic Chemistry

April 3, 2014

This is an experiment for the conversion factors for the Chapter 12 of Inorganic Chemistry.   Below are the equations we are using for gas laws. Boyle's Law  P1V1=P2V2 Charles's Law . . . read more

Physics Science Fair

April 3, 2014

May 21st at 5PM is the annual CHS Science Fair. We will be showcasing the Physics Projects for the 2nd Semester. For the students, we will focus on a literary review this year as well as, either a working demonstration of the research . . . read more

Moles on Halloween 2013

October 31, 2013

Congrats for a successful Mole Day, October 23, 2013. The moles are ready for Trick-or-treat tonight. So if you see a mole, give it a snickers (R) so that it will move on to the next yard.  6:02 x 10 ^23 a mole and Avogadro's . . . read more

Physics Impulse and Momentum Guides

Chapter 7 Early Problems

February 12, 2013

Attached are the starred solutions to the chapter 7 skip 2's     physicsch7p12 Physicsch7p13 physicsCh7p20 PhysicsCh7p21 Enjoy. I'll give you a few more days to review read more

Physics homework Jan 28th

January 28, 2013

Attached are the files for problems 52 yes 52 but I labelled it wrong in the beginning. It's still a baseball problem Physicsenergy52 then 53   Physicsenergy53 and finally 60   Physicspower60   none of . . . read more

Physics Homework Part 2

January 24, 2013

Below is the video for problem #37 in Chapter 6. The sound still seems a bit of the issue. It runs 4:42 even with the drawing in place. Good luck and enjoy the rest of your weekend. Mr.L ch6prob37 read more

Physics homework

January 23, 2013

PhysicsCh6no36 give it a try and see what happens. The sound is not the best. need a speaker headset to work on this. read more

National Chemistry Week

October 3, 2012

This is the 25th Anniversary of National Chemistry Week. Nanotechnology: The Smartest BIG Idea in Science!   Attached is the outreached publication by American Chemical Society and Nanoscience Informal Science Education . . . read more

Boys Track to State

May 21, 2012

The Comet Boys Track Team has qualified 7 runners to the IHSA State Meet for May 24 at Eastern Illinois University. The runners include Seniors: Matt Dixon, Ryan Hull, Troy McCreery, Jose Munoz, Mitchell Wainwright and Zach Wainwright; and . . . read more

Temporary site for syllabi

by David Ladehoff | August 25, 2011

For Chem Comm  For Inorganic Chemistry  For Physical Science For Physics   read more

Computer Imagine of Molecules

by David Ladehoff | November 29, 2010

The Inorganic and Chem Comm students are relating the chemical formulas to 3D images created in a computer program. The inorganic students are studying the effects electron behavior to whether the compound should be named as an ion, covalent . . . read more

Mole Day 2009

by David Ladehoff | November 4, 2009

Central High School went to the Museum of Science and Industry in Chicago for the annual Chemical Industries Council of Illinois' Career Day on Friday, Oct. 23, 2009. The inorganic chemistry students watched demonstrations by Lee Merek, . . . read more

Back in the Science Laboratory

Inorganic Chemistry Studying the Law of Conservation of Matter

by David Ladehoff | September 29, 2009

Inorganic chemistry students are finding their way in the laboratory by measuring solids and liquids in a variety of techniques. The students enjoy having the opportunity to partner with classmates and use cooperative learning during the . . . read more

Summer Cross Country

July and August Optional Practices

by David Ladehoff | July 8, 2009

The following dates are listed for Comet Cross Country with times and place. July 7 and 9 beginning at 4 and 5 PM in Clifton at the sign; July 20, 21, and 23 at 4 and 5 PM in Chebanse Elementary south parking lot; July 27, . . . read more

Gas Laws for Inorganic

by David Ladehoff | March 4, 2009

The Chemistry Class is ending the Gas Laws Chapter and will be tested Friday, March 6, 2009. Studying gas laws requires the collection of data such as volume, pressure, temperature, and the number of moles. In the calculations of the lab, . . . read more

Physics Races

by David Ladehoff | March 4, 2009

Central Physics students were early rising to race their potential energy vehicles in February. We had 12 students in the competition to power a car to travel on a 12" balloon. Red was used for Friday the 13th, just before Valentines Day. . . . read more

Inorganic Final

by David Ladehoff | December 15, 2008

Inorganic Chemistry is finishing up the semester with ionic and covalent compounds. In order to show ionic lattice structures and their differences, students finished the semester with the Alum Lab. The crystals were created in two days . . . read more

The Mass of Chemistry

by David Ladehoff | October 31, 2008

Inorganic and Chemistry in the Community are discovering the Periodic Table and working through the measurement of the atom. It also corresponded well with "Mole Day" 10/23 from 6:02 AM to 6:02 PM. Students were helpful for providing . . . read more

To contact Mr. Ladehoff

by David Ladehoff | November 29, 2006

e:mail dladehoff@cusd4.org phone CHS at 815-694-2321 read more

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