Welcome back from spring break. This is the first of the assignments for this week's homework. Remember, these are about 20% of your grade, so it is important to take the time to practice the stuff we introduce in class at home.
For each problem below, use the table [HERE] to figure out what state (gas, liquid or solid) the sample started in, and what state it ended up in.
1) A sample of mercury starts out at 560 degrees K, and then cools down (ie, the temperature decreases) by 100 K.
2) A sample of ethyl alcohol starts out at 153 degrees K, and then it heats up (ie, the temperature increases) by 100K).
3) A sample of gold starts out at 300 degrees K (fridge temperature). Then, a chemist increases the temeprature by 1000 degrees K.
4) A sample of hydrogen starts out at 90 degrees K (colder than any temperature on earth), and then cools down even more to end up at 50 degrees K.
5) A sample of iron is in the earth's mantle (under the crust) where it is very hot -- 2,400 K. When a volcano spits out the sample onto Earth's surface, it cools down by 500 K.
6) A sample of oxygen starts out at 100 degrees K, and then its temperature is decreased to 60 degrees K.
7) A sample of nitrogen starts out at 100 degrees K, and then it is chilled down to 50 degrees K.
A site to communicate HW and other information to the Wildcats who are learning chemistry with Mr. Mikulski!
Tuesday, April 10, 2012
Makeup HW assignment due Thursday, April 12th
If you were working on the makeup homework allowance I had set aside for during spring break, the last day to turn it in to the box in my room is this Thursday.
Friday, March 23, 2012
Make-up HW Project (something many of you can do over break)
I am permitting any student that has missing HW since the start of semester to do these assignments NOW, late, for 1/2 credit. This is better than the zero credit that you would otherwise get, and would help bring many of you overall averages up.
Their are a total eight assignments that apply in this project -- starting with HW#16 on Jan. 22-29th and ending with HW#23 on Mar. 11-18th. So, if you had all of them missing, and completed all eight of them and brought in your work when we come back from break, you can earn up to 5x8 or 40 points of extra practice credit to improve your grade...
You can access all previous weeks of HW by clicking on the given week in the 'Blog Archive' bar on the right side of this page
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If, on the other hand, you are someone that has been doing your HW, you have the possibility to earn some EXTRA practice credit:
The project is to plan, conduct, and write a lab report for your own homemade experiment. It can involve family members or friends, as long as its safe, but it should start with a question you have and a hypothesis. Give me a call using the phone number provided on the syllabus if you need help planning your experiment. Remember, every experiment has at least one INDEPENDENT VARIABLE (what the scientist is purposefully changing, or in select cases what has to "happen first" for the other variable to possibly change) and at least one DEPENDENT VARIABLE (what the scientist measures).
You can also use our lab template [HERE] as well as the 'Golden Lab Guide' [HERE] if you need help making sure your lab report is complete and of a high quality.
Their are a total eight assignments that apply in this project -- starting with HW#16 on Jan. 22-29th and ending with HW#23 on Mar. 11-18th. So, if you had all of them missing, and completed all eight of them and brought in your work when we come back from break, you can earn up to 5x8 or 40 points of extra practice credit to improve your grade...
You can access all previous weeks of HW by clicking on the given week in the 'Blog Archive' bar on the right side of this page
---------------------> ---------------------> ---------------------> --------------------->
If, on the other hand, you are someone that has been doing your HW, you have the possibility to earn some EXTRA practice credit:
The project is to plan, conduct, and write a lab report for your own homemade experiment. It can involve family members or friends, as long as its safe, but it should start with a question you have and a hypothesis. Give me a call using the phone number provided on the syllabus if you need help planning your experiment. Remember, every experiment has at least one INDEPENDENT VARIABLE (what the scientist is purposefully changing, or in select cases what has to "happen first" for the other variable to possibly change) and at least one DEPENDENT VARIABLE (what the scientist measures).
You can also use our lab template [HERE] as well as the 'Golden Lab Guide' [HERE] if you need help making sure your lab report is complete and of a high quality.
Wednesday, March 14, 2012
HW#23b -- Wednesday, March 14th
Answer each of the followijng questions, in 2-3 complete sentences. Make sure your answers are informed (use Wikipedia or other internet sources if you need to):
1) What are some organic farming practices?
2) What are some conventional farming practices?
3) How might an organic farmer respond to a bunch of insect pests coming and eating on the salad greens he's growing?
4) Why might it be good to eat food that is grown closer to where you live? Why might it be bad?
1) What are some organic farming practices?
2) What are some conventional farming practices?
3) How might an organic farmer respond to a bunch of insect pests coming and eating on the salad greens he's growing?
4) Why might it be good to eat food that is grown closer to where you live? Why might it be bad?
Monday, March 12, 2012
Thursday, March 8, 2012
HW#22b -- Friday, March 9th
For this assignment, read the following online article about plastics in the ocean [HERE] and then answer the following questions:
Before reading:
1) When you throw away garbage, where does it go? Name a few places other than the dump where you’ve seen lots of trash.
During/After reading:
2) List a few things a person could find at Kamilo Beach. List a few things a person could not find at Kamilo Beach.
3) How many tons of trash do volunteers remove from the Kamilo Beach area each year?
4) The North Pacific Ocean gyre is far from land. So how does so much plastic trash end up in the gyre?
5) Describe how scientists collect and study samples from gyres.
6) Describe the different ways that sea life interacts with the floating plastic. (Hint: How do barnacles use floating plastic? Do some animals eat the plastic?) Are these interactions good or bad?
7) Why are the smaller pieces of plastic floating at sea so dangerous?
Before reading:
1) When you throw away garbage, where does it go? Name a few places other than the dump where you’ve seen lots of trash.
During/After reading:
2) List a few things a person could find at Kamilo Beach. List a few things a person could not find at Kamilo Beach.
3) How many tons of trash do volunteers remove from the Kamilo Beach area each year?
4) The North Pacific Ocean gyre is far from land. So how does so much plastic trash end up in the gyre?
5) Describe how scientists collect and study samples from gyres.
6) Describe the different ways that sea life interacts with the floating plastic. (Hint: How do barnacles use floating plastic? Do some animals eat the plastic?) Are these interactions good or bad?
7) Why are the smaller pieces of plastic floating at sea so dangerous?
HW#22a -- Thursday, March 8th
Your HW assignment for today is to write a four-paragraph essay about rubber and plastics. The first two paragraphs should have 3-5 sentences each, and should explain what rubber is, what natural sources we get rubber from, and the things we use rubber for. The last two paragraphs should explain what plastics are, how we make them, and the things we use plastics for.
One of the best sources for this assignment is wikipedia, which is a great starting place. It will certainly give you a good definition for "rubber" and "plastics." It should also show you how we get these substances, as well as how they are used to make things around the world!
One of the best sources for this assignment is wikipedia, which is a great starting place. It will certainly give you a good definition for "rubber" and "plastics." It should also show you how we get these substances, as well as how they are used to make things around the world!
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