Physical and Chemical Changes

Apple

1. What is the atomic number and atomic symbol of Oxygen? What is the atomic number and symbol of Iron (This one is a little trickier. Study the periodic table closely.)?
   

   
    

2. Look up the apple link on the website. Why do cut apples turn brown?
   

   
    

3. What other chemical reaction, which occurs on bikes and gates, is similar to what happened to the apple?
   

   
    

Eggshell

1. Please click on the eggshell link. What is eggshell made of?
   

   
    

2. Look at the chemical formula on the webpage. What is produced when the eggshell combines with the acetic acid (vinegar)?
   

   
    

3. Soda also has acetic acid. Hypothesize, why do dentists worry about people drinking too much soda?
   

   
    

   
    

Hand Warmer

1. Please read the 2 paragraphs in this advertisement. What is inside the warmer pouch, or bag?
   

   
    

2. What causes the bag to warm up? In addition to heat, what is produced when the bag warms up?
   

   
    

   
    

   
    

   
    

Ice

1. Please draw and describe the atoms of a solid, as shown under the microscope on the website.
   
2. Draw the differences between atoms of solids, liquids, and gases.
   

 

 

Physical and Chemical Changes

Physical/Chemical Properties
1) Please click on the following link to record a definition of physical property and chemical property. Also, try to figure out the difference between a physical and chemical change.
http://www.fordhamprep.com/gcurran/sho/sho/lessons/lesson15.htm

http://www.ric.edu/faculty/ptiskus/chemical/

2) Use this link to answer the following questions: http://yucky.discovery.com/noflash/body/pg000126.html
A. What starts chemical changes in food?
B. Are the following Physical or chemical changes?
a.The teeth tear off a bite of pizza.
b.The starch in the pizza crust turns to sugar.
c.Muscles squeeze the chewed pizza down your esophagus.
d.In the intestines, liquids from the kidneys and pancreas mix with leftovers from the stomach.


Finally, please watch this slide show that depicts examples of pollution in China.
http://www.nytimes.com/packages/html/world/20070826_CHINA_OVERVIEW_FEATURE/index.html

Acid Rain Investigation

Dear MST-7 Scientists,
Please read this article to read about how pollution in China can affect the United States.
http://www.cnn.com/2007/WORLD/asiapcf/11/13/pip.coal.ap/index.html?section=cnn_latest

Second, this week we will investigate how we can reduce the volume of acid rain that enters our soil.

Today’s objective will be to define acid rain and figure out how it’s produced. You will answer the following questions:
· What is acid rain?
· What chemicals make rain acidic, and how does it happen?
· Can you find a chemical equation that shows how acid rain is created?
· Where do these chemicals come from?

http://en.wikipedia.org/wiki/Acid_rain
http://www.epa.gov/acidrain/education/site_students/index.html

Good luck scientists!
VKV

Periodicity

Periodic Table - What is a group? What is a period?
Families - How are elements grouped into families?
Metals - What % of elements do these make up?
Lanthanide Series (part of the inner transition metals) - Under "Meet the Family", what is unique about the actinide series?
Halogens - How many electrons do halogens have in their valence energy levels? What do halogens like to react with?
Inert gases (noble gases) - Why are they happy?

Elements and Atoms

http://periodictable.com/

Newspaper

http://www.newtrier.k12.il.us/ntnews/sports/sports.html

We Love Minerals!

Dear Kiddos,
Below are links to minerals you will be researching. Please remember to look for what elements they are made of, their structure, where they are found, and what they are used for. Happy mineral hunting!
--MST7

Galena
http://webmineral.com/data/Galena.shtml
http://en.wikipedia.org/wiki/Galena

Magnetite
http://webmineral.com/data/Magnetite.shtml
http://en.wikipedia.org/wiki/Magnetite

Pyrite
http://webmineral.com/data/Pyrite.shtml
http://en.wikipedia.org/wiki/Pyrite

Milky Quartz
http://en.wikipedia.org/wiki/Milky_quartz

Sulfur
http://en.wikipedia.org/wiki/Sulfur

Microcline
http://en.wikipedia.org/wiki/Microcline

Yellow Quartz
http://www.webmineral.com/data/Quartz.shtml

Nepheline
http://en.wikipedia.org/wiki/Nepheline

Lepidolite
http://en.wikipedia.org/wiki/Lepidolite

Calcite
http://en.wikipedia.org/wiki/Calcite
http://webmineral.com/data/Calcite.shtml

Satin Spar Gypsum
http://en.wikipedia.org/wiki/Selenite

Alabaster
http://en.wikipedia.org/wiki/Selenite

Quartz Crystal
http://en.wikipedia.org/wiki/Quartz_crystal

Da Vinci

Hey Kiddos!

Please answer the first two questions on the following website. Please remember to take notes and write in your own words:

http://coe.west.asu.edu/students/ksample/webquest/leonardodavici.htm

Also, please research Da Vinci's designs at the following website:
http://www.museoscienza.org/english/leonardo/default.htm
http://en.wikipedia.org/wiki/Da_vinci

Finally, we'll work on compound machines at this website:
http://www.edheads.org/activities/odd_machine/frame_loader.htm

Happy Friday!
--VKV

Big Exam

Dear Explorers!

I hope you're enjoying a restful, yet productive weekend! Please take the time to study for the Science Unit Exam! Remember to use the study guide to review graphs, variables, measurement, and speed.

Take care,
MST-7