Monday, October 31, 2011

Earth science 10/31/2011

1)  1st and 5th:  Finish Dimensional  Analysis problems from ppt into notebook.

see pg 25 in your planner for conversion factors:
1.How much mass do you have in kilograms?  Round to the nearest hundredth.
2. For optimal health all Humans should drink between 1-2 quarts of water each day; How much water is this in  milliliters?
 
2) ALL classesRough Draft of Volume lab:  Q,H,T,M,DT + OJ
 
Volumetrics: practicing at measuring volume
Question:  Which of the measuring devices (400 mL plastic beaker, ___250___ mL glass beaker or a 100 mL Graduated .Cylinder.) will be most accurate?

Hypothesis:  Which device? and why?

Test:  Carefully fill 4 of the provided containers with water then measure that unknown volume of water using each of the measuring devices.  Then compare your results with the teacher’s.

Materials: 4 out of 9 #ed containers, water supply, paper towels, 400 mL plastic beaker, ______mL glass beaker and a 100 mL G.C.

Data Table:  complete the data table and record your collected data
Device

Volume in mL for #___
Volume in mL for #___


























Class Average for each device





Observations:

Analysis:  Show work to calculate the averages

Conclusion: (Which device was most accurate?  Describe how/why you know this.  How do your numbers compare to the class? To the teachers?  What errors might have occurred?)

Tuesday, October 25, 2011

Earth science HW

Finish min lab final draft following standard OHS lab format.

1.question/problem (often based on observation)
2.hypothesis (educated guess that answers your Q)
3.test (experimental concepts)
4.materials (everything used in experiment)
5.procedures (recipe of experiment with diagrams)
6.data (data table and observations of data collection)
7.analysis (graph of data, related math, and occasional questions provided by teacher)
8.conclusion (What happened?  Did you answer question? Did data support or refute hypothesis? Why? How did error influence your results? Next step/societal implications)
 
Instructions:  DO NOT WRITE ON THIS HAND OUT!  You and your tablemates will be practicing the steps of the scientific method, conducting an experiment and writing-up a lab. 
·        On a separate sheet of paper write the names of the members of your table that actively help with all parts of the mini-lab; this will be your lab write-up.
·        Write out the question I gave you below, include the label Question:
·        Write our Hypothesis: and then your educated guess to answer the question.  Remember to discuss with your tablemates about how to make an educated guess then record the hypothesis on your lab write-up.
·        Continue writing the label for each step (Q, H, T, M, P, D, A, & C) and following my hints for each step.

Question:  How much space (volume) does a drop of water take up?

Hypothesis:  What is your educated guess to answer the question? Compare 1 drop to 1 mL of water.

Materials:  Every item used for data collection

Procedures: Step by step directions of your experiment that include diagrams that help illustrate your procedures

Data table:  Have room to include ten trials, Yes, do the experiment ten times, make sure everyone in your group has an opportunity to collect data by doing the experiment.

Analysis:   Show an example of how calculated the volume of a drop, in mL. Also show an example of how calculated the average volume of a drop, in mL, for the trials you did. Create a data table showing the average drop # for all other groups in the class.

Conclusion:        Restate your hypothesis. Did you answer the question?
                   How do your results compare to the other tables?  Explain.
How might error have occurred in your experiment?  What affect might it have had?  How can you redo your experiment to attain more accurate
results?

Earth Science - Current Events

All students will be finding an article or video  on a recewnt scientific concept.  They will sumarrise and cite their source according to the OHS work cited format found at http://ohs.juhsd.net/library/goldenpage.pdf. They will then present oral, using notecards, for 3-5 min.. on their topic.  They will pick the day starting Oct. 25th and finishing Dec. 9th.  This will count as an assement assignment (test/quiz/project) and will be woth 100 points .; See attached  information.

You will choose (or be assigned) a date to present a science current event. For this presentation, you will need to find a news story or feature about something related to science. All students must sign up and present before the end of the semester. It will fall into one (or more) of these categories:

·         Scientific discovery – for example, scientists find comets may have delivered the water found in earth’s oceans.
·         Science-related event – for example, the Japan earthquake/tsunami/nuclear plant meltdown; the launch of a space probe.
·         A cultural change/happening that involves science/technology – for example, bicyclists’ clothing that can act as a radar gun to show drivers how fast they’re moving.
·         Science in public policy – for example, a bill or law that deals with science (cap on carbon emissions).

The article must be timely, meaning it’s been published within a month of your presentation. Finally, technology articles are okay, but I will not accept any product announcements or reviews.

The presentation will include two parts. The first is a write-up of your current event, summarizing the story and answering key questions. You will include a copy of the story you are citing. The second part is an oral presentation that should take between 3 and 5 minutes. This assignment is worth 50 points.

Science current events will:

Cite the news source, using the Oceana Golden page format for citations found on the Oceana website. Magazine Article:
Perlman, Jeff. “Sultan of Swat.” Sports Illustrated. 12 February 2001: 54-59.
Newspaper Article:
*  Taylor, Michael. “Potholes Scar Roads Across Region.” San Francisco Chronicle. 23 October 2005:
*  Give the title of the article, author’s name, and article date within the body of the summary.
*  Summarize the event in your own words, using complete sentences. Spelling and grammar count.
*  Your summary will answer the following questions:
·         Who/what is the subject of the story?
·         Where did it happen?
·         When did it happen?
·         How did it happen?
·         Why did the event happen, or why was the event important enough to make the news?
·         Why did you choose this article?
·         What did you learn from the article, and what are your thoughts about this event/issue?
*CONNECTION AND COMMENT RELATED TO ONE ESSENTIAL QUESTION:
·         How does this event affect the world or region where it occurred?
·         How does this discovery advance science?
·         What does the discovery/event mean for our society?
·         What does this discovery/event mean for future work/the environment/humanity/etc.?
·         If the story is about a law or policy, how does the policy or law affect science/society?

Below are several acceptable web sites and sources for science news stories. If you wish to use a source not listed below, please check with me first.

Popular Science

New Scientist (News)

Wired Science

New York Times (Science Times)

Discover Magazine

National Geographic (News)

BBC Science/Environment
http://www.bbc.co.uk/news/science_and_environment/

NPR - Science News

Boing Boing (Science)

Grist

Good (Environment, Food, Health, Technology, Transportation)

The Guardian (UK) Science

Scientific American                                  (Often written for college level or higher)

Reuters Science
http://www.reuters.com/news/science

Monday, October 24, 2011

Biology HW 10/24/11

Read and take notes for ch 12.1 & 12.2 on DNA, pgs 326-335 in the Glencoe Biology Book.

Thursday, October 20, 2011

Biology HW

Study for Chemistry in Biolgy test, ch 6.  practice balancing chemical equations.  Go online if needed .  Ex. try this site from Jefferson Labs  http://education.jlab.org/elementbalancing/question.php?36819702

Wednesday, October 19, 2011

Earth science 10/19/2011

1)  Complete the Drops on a Penny minilab as a final write up.  Include all steps mentioned in class in conjunction with lab rubric.  This should be typed or blue/black ink and on a seperate piece of paper , not in science notebook. Use attached guide sheet to help you.

2)  Read and take notes for Skills Handbook, pgs. 931-938.

Instructions:  DO NOT WRITE ON THIS HAND OUT!  You and your groupmates will be practicing the steps of the scientific method, conducting an experiment and writing-up a lab. 
·        On a separate sheet of paper (NOT in the notebook) write the names of the members of your table that actively help with all parts of the mini-lab; this will be your lab write-up.
·        Write out the question I gave you below, include the label Question:
·        Write our Hypothesis: and then your educated guess to answer the question.  Remember to discuss with your tablemates about how to make an educated guess then record the hypothesis on your lab write-up.
·        Continue writing the label for each step (Q, H, M, P, D & C) and following my hints for each step.

Question:  How many drops of water can a penny hold?

Hypothesis:  What is your educated guess to answer the question?  You may compare a penny next to a single drop to help you with this.

Materials:  Record every item used for data collection

Procedures: Record Step by step directions of how you used each material listed in your experiment to find your answer, include diagrams that help illustrate complex  procedures. Final  procedures should be more complex than those listed in your RD.

Data table:  Have room to include ten trials of data collection.  Yes, do the experiment ten times, (5 trails per person) make sure everyone in your group has an opportunity to collect data by doing the experiment.

Analysis:   Show an example of you calculated the average  # of drops for the trials you did. Create a data table showing the average drop # for your group. Make a bar graph of your trails and the average # of drops.

Conclusion:        This should be in para graph form and not just answers to the following questions
Did you answer the question?   Do your results compare to the other tables?  Explain.  How might error have occurred in your experiment?  How can you redo your experiment to attain more accurate results?

Bonus Points:  if you finish early, you may earn bonus points for conducting a next step to this experiment.  You are limited to the materials provided or on your person & you must make another lab write up.  You may also include a graph of your data for e.c.
                  
Drops of Water:  Measurement and Error