Science 11/22/2011

EXAMPLES OF CHEMICAL REACTIONS

SYNTHESIS/COMPOSITION                  2H₂ + O₂ à 2H₂O

DECOMPOSITION                           2KClO₃ à 2KCl + 3O₂

SINGLE REPLACEMENT                  2Al + 3NiBr₃ à 2AlBr₃ + 3Ni

DOUBLE REPLACEMENT                  AgNO₃ + KCl à AgCl + KNO₃

VOCABULARY

CHEMICAL FORMULA – a shorthand way to show a compound or molecule

CHEMICAL EQUATION – shorthand description of a chemical reaction

CHEMICAL REACTION – the process of when substances undergo changes to produce new substances

REACTANTS – what you begin with in a chemical reaction

PRODUCTS – what you end with in a chemical reaction

SYNTHESIS/COMPOSITION REACTION – when you begin with two or more simple substance and produce a complex substance

DECOMPOSITION REACTION – when you begin with a complex substance and produce two or more simple substances

SINGLE-REPLACEMENT REACTION – when a single element switches places with an element in a compound

DOUBLE-REPLACEMENT REACTION - when a two elements switch places with each other in a two compounds

IONIC BOND – bonding between a metal and a non-metal when electrons are transferred from the metal to the non-metal

COVALENT BOND – bonding between non-metals when electron pairs are shared

11/11/2011

No pictures this week. We've been learning about chemical bonding. It is quite an abstract idea and it is giving us a challenge. We went to ExploreLearning and used their online simulations to help us. Check it out at -

http://www.explorelearning.com/

Type "bonding" in the search bar and you will be directed to ionic and covalent bonding Gizmos. We did both simulations. We will be moving on to chemical reactions this week.

Science 11/4/2011

The classroom has been quiet today as students have busy showing what they know about atoms and the periodic table (on today's test.) One class was done early enough to play a review game on the symbols for the elements on the periodic table.

Students have been fascinated with the barometer today. It is overflowing, predicting rain for early next week. We'll see if that happens.

Science 10/31/2011

Been working on atoms. We have a song that we are learning but it isn't ready for prime time, so I'll just post the lyrics and some pics of us practicing. We will have a test over atoms on Friday, Nov. 4.

 

Science 10/20/2011

Well, another week has gone by. Thought I'd let you know what we have been doing.

First, was to learn about mixtures and experience how they can be physically separated. 

 

How do you separate iron filings, salt and sand?

The magnet removed the iron filings, the salt is soluble in water allowing us to filter out the sand.

The water was boiled off, leaving the salt behind.

 We then looked at solutions, colloids and suspensions.

Everyday examples.

Then we had some fun with colloids.
 

Mixing white glue solution and borax suspension.

 

Playing with the results.

Corn starch and water is always a fun way to show non-Newtonian fluids.

Science 10/12

PHMS received Standard of Excellence on ALL seven state assessments. Way to go Cougars!

We have started looking an overview graphic organizer of Matter. We will be working on it for several weeks. We just finished a graphic organize of the Phases of Matter. We used the Boyle's and Charles' Law Gizmo to see the Laws in action.

The Matter graphic organizer before we started.

What it will look like in a couple of weeks.

Information about each phase.

Phases and phase changes graphic organizer.

Iodine gong from a solid to a gas.

Japanese Class 10/5/2011

After watching Sadako and the 1,000 Paper Cranes, we started learning how to fold origami. We began with samurai helments, which are very easy. We were all successful!

Folding the last step.

Success - 8 students and 8 helmets!