Friday, April 23, 2010

Tuesday, February 23, 2010

Trouble in Tornado Alley

What states make up Tornado Alley?

What type of air is required for a tornado to form?

What warning systems are in place to help people evacuate before a tornado strikes?

Monday, January 11, 2010

Changing Freezing and Boiling Points

Do you know what is inside the strange building shown in this photograph? The building is used to store salt that is spread on the road when weather conditions are below the freezing point of water. What effect will the salt have on icy roads? Why store the salt in a building?

This truck removes snow and spreads salt. How does spreading salt on roads reduce accidents?

A solution of antifreeze is used to fill car radiators. It lowers the freezing point of the water in the radiator of the car. It also raises its boiling point and reduces corrosion. Why are the properties of this solution useful to motorists? Why isn’t salt used instead?

Thursday, January 7, 2010

Separation Science at the FBI


1. What are the two types of chromatography mentioned in this reader? Use an encyclopedia, other library resources, and the Internet to find out more about these and other chromatography techniques.

2. Luminol is a chemical used by forensic scientists to reveal traces of blood not readily visible to the human eye. Do a search on the Web site to find out how Luminol works.

Wednesday, January 6, 2010

Getting Taken to the Cleaners


1. Why do people who own washing machines still go to the dry cleaners?

2. Can you suggest two advantages of recycling the solvents used in the dry-cleaning process?

3. Heat generally causes materials to expand. If this is true, why do some fabrics shrink when washed?

Sunday, January 3, 2010

Separating Solutions and the Salty Sea

Why is the sea saltier than rivers?

What is desalination?

What do the Salton and Aral Seas have in common?

What environmental problems do they have?

It is widely believed that the term "salary" was derived from the Latin word for salt. Based on what you read in this article, why might this be true?

Monday, December 14, 2009

Dissolving History

Read the article and answer the following question.

How is acid rain formed? Write a short paragraph describing this process.
Type your name at the bottom.

Sunday, December 6, 2009

Heating and Changing Matter

Read the article and answer the questions on the blog. Type your name below your answers.

1. Can you identify any of these changes?

2. How could these type of changes be useful to people?

Friday, December 4, 2009

Anchor Activity Student Questions/Ideas for project

For any student that would like to post a question or idea to their partner or other classmates for the "The Right Stuff" Anchor Activity. (Due 12/22)

Saturday, November 14, 2009

Lost Wax Castings

Question for Article:

How is knowledge of melting points important to the art of "lost wax casting?"

Answer the article and post your answer.

Don't forget to type your name at the end of your answer.

Tuesday, October 27, 2009

Density Creates Currents


Saturday, October 24, 2009

Just a Load of Hot Air

Read the article and answer the question. Post it on the blog and then read the other student's answers.