Polymers are composed of many small, repeating units called ________________________, which are bonded together by a chemical reaction.
Monomers
100
Define composite.
Combines two or more substances, utilizing the BEST properties from each to create a superior product.
100
An alloy is made up of at least two substances and at least one must be a(n) ________________.
What is a metal?
100
What three objects/factors must combine to create ceramics?
Clay + Other minerals + Heat
100
What is the difference between a chemical and a nuclear reaction?
In a chemical reaction, the elements share electrons and are NOT changed. In a nuclear reaction, the protons and neutrons are affected and change the identity of an element.
200
Draw an example of the TWO types of polymer chains.
Type One: One monomer, repeating
Type Two: Two or more monomers, repeating
200
What two polymers combine to form the composite WOOD?
Cellulose + Lignin; The lignin is the "glue" and the cellulose provides strength
200
Alloys are considered superior to pure elements because they do not react with...
What are air and water?
200
What objects/factors must combine to create glass?
Sand + Limestone + Head
200
Discovered by Willard Libby, ______________________ can help determine the age of ancient organic materials.
What is radioactive (carbon) dating)?
300
Which of the following is NOT a plant polymer:
Cotton,
Rubber,
Silk,
Hemp
Silk
300
What two polymers combine to create the composite FIBERGLASS?
Glass + Liquid Plastic
300
What is amalgam used for? Why is amalgam suited to this purpose?
What are dental fillings? Because it is easily shaped/molded.
300
Give FOUR reasons why glaze is often added to ceramic objects.
1) Gives color
2) Adds decoration
3) Increases strength
4) Creates a waterproof barrier
300
A ___________________ of Carbon is Carbon-14; It has 2 more neutrons than Carbon.
What is an isotope?
400
Name four synthetic polymers.
Answers vary.
400
What are the benefits of using fiberglass in cars?
Solid, yet lightweight; resists corrosion
400
What is one use for brass? How do the properties support this function?
Musical instruments/faucets/jewlery; Strong, does not wear, polishes well
400
If I live in Seattle (a city inundated with rain), should I roof my home with unglazed ceramic tile? Why or why not?
No - not waterproof (can cause mold and water damage)
400
What happens to the atomic number and the mass number in alpha decay?
Atomic number decreases by two. Atomic mass decreases by four.
500
Identify the FOUR reasons for using synthetic polymers.
1) More durable, 2) less expensive, 3) meet a high demand without destroying a natural resource, 4) Technology
500
Why is sporting equipment often made of composite polymers?
Lightweight -- Requires less energy
500
How can you determine whether your silverware is made out of sterling silver or stainless steel?
Compare the properties -- Which is harder, which resists corrosion
500
A threadlike piece of glass used to transmit light and sound.