Homework #7

p182  #18 -21

18.
     a. When you reuse something, the looks or use for it do not change. However; when you recycle you can completely change its physical appearence without changing its chemical structure.
     b. Reusing: Keep the same water bottle and use it over and over again.
         Recycle: Melting a plastic water bottle to make a different plastic appliance such as a container.

19.
     a. fresh water and air, plants, soil, and animals are all renewable resources
     b. metals, coal, natural gases, and pertoleuom are nonrenewable.

20 .
      a. Reusing
      b. Recycling
      c. Recycling

21. Less stuff happens to light bulbs then paper. Which makes light bulbs to be recycled much more than paper. They live longer in the renewal procecdure.

p204 #1-6

1. Allotropes are the same elements that have been changed but still holds the same physical and chemical properties of the element.

2. Oxygen and Phospherous

3.
    a. the properties are different because a diamond can not be destroyed and shiny, while lead and coal are dull and toxic.
    b. Properties are different because of different physical appereance
    c. A diamond gets its worth through its appeareance, other things that are not good to visually see are  not worth that much

4. Some things are not made from natural resources because the reactivity is so high its safer to be made in a lab. Silver and gold which have low reactivity are found in nature.

5. Advantages are all the control we have as the creators but it comes with side effects.

6. Plastic can be altered to be hard for sturdiness and it ca be made maeleable and soft.