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More Exam Review

Reading Scales (pages 23 - 26)
-be sure you can accurately read the scales on page 26 in the Lab Manual

Fundamental Quantities-know the UNITS (page 111)
-Length - know how to read a meter stick (pages 23-25)
-Mass - know how to read the EAB, know the Law of Conservation of Mass
-Time - know the law of the pendulum (L/T^2 :: 20/1)
-know how to use a proportion to calculate the length (L) of a pendulum or the period (T) of a pendulum

Volume and Area (pages 50-53)
-know the UNITS (page 111)
Know how to:
-find volume of regular and irregular objects
-find the area of rectangles, circles, triangles and other figures made of these shapes

Characteristic Properties-Boiling Pt, Melting Pt, Density, Solubility -be sure you know that Characteristic Properties are independent of the amount of substance present--(a drop of water boils at the same temperature as a large pot of water and 5 cc of water have the same density as 25 cc of water, etc. . .)

Science EXAM Coming--sooner than you think! 5/6/2009

Preparing for the science exam will take more than one evening. In fact, you should already be preparing. Take advantage of the Review Guide and the other study tips and practice questions provided here and on the Thayer website. Doing a little bit each day will help tremendously. About 10 to 20 minutes of study each night between now and Thursday, May 28th should leave you well prepared for the science final exam. Get to it!

Exam Review. Proportion Practice:

-How tall is a fence 100 meters away that appears to be 5 cm high when compared to a ruler held 50 cm from your eye?

-The density of gold is 19.3 g/cc. What is the mass of a gold bar 2cm x 1cm x 5cm?

-If 34 grams of salt dissolve in 100cc of water at 20°C, how much salt will dissolve in 55cc of water at the same temperature?

-What is the length of a pendulum with a period of 3 seconds?

-What is the period of a 120cm long pendulum?

Big Ideas in Science: Matching

Quiz Reminder, week of 5/4/2009

Although we will be busy working on building circuits next week, we will have time to squeeze in a quiz relating to the You Tube videos we watched in class. If you need to review the videos, they are linked below (I will probably allow you to use any notes that you have taken in class or at home, so please bring your notes to class all next week):

Gold foil Experiments:
http://www.youtube.com/results?search_type=&search_query=ernest+rutherford+goldfoil+experiment&aq=f

http://www.youtube.com/watch?v=dsq9OiM76OY&feature=PlayList&p=05838CEE514F300D&index=19&playnext=2&playnext_from=PL

Static:
http://www.youtube.com/watch?v=YFeFsw3Ht2c

Electricity:
http://www.youtube.com/watch?v=WDW0IqwMK00

http://www.youtube.com/watch?v=kxZ-ZbXQygs&feature=related

http://www.youtube.com/watch?v=ucTxDam_Huk&NR=1

Quiz RETAKE opportunity:

There will be a retake opportunity for all students who scored lower than a B- on the Solubility/Buoyancy Quiz. In order to qualify for this retake, you must write out definitions for all terms that you missed, and explanations for all missed questions on the original quiz. The retake is optional, but the corrections are not--no corrections = no retake. The maximum grade that you can earn on the retake is a B-. You should study from the quiz reminder that was posted last Thursday. There will be no more retakes offered this year. Spread the word. PAY ATTENTION and STUDY! The year is coming to a close much faster than you think!

Final Exam Review Guide

The Preliminary Exam Review Guide is now available on the Thayer website. Start reviewing early and eliminate stress during exam week.

Quiz Reminder:

For this quiz, know the following: Definitions for solution, solute, solvent, saturated solution, concentration and solubility. Know how to create a saturated solution and understand the technique for discovering the solubility of a substance.

Know that forces can be pushes or pulls. The weight of an object depends on gravity, gravity is a force, buoyancy is a force acting against gravity. The buoyant force is always equal to the weight of the displaced fluid (Archimedes' Principle). The buoyant force acts on objects whether they float or sink. How low a floating object sits in the fluid depends upon its density. Know how to calculate the buoyant force acting on an object.

Monday's Solubility Problem:

Remember: this problem is based on the experiment we did in class. If you use the same data table to organize your measurements and calculations, you should have an easier time calculationg the solubility of this substance. Keep in mind that the solvent IS NOT WATER. You must calculate the VOLUME of the solvent using a density proportion. If you have trouble with this problem, don't worry, we will review it in class. Before pouring a saturated solution into an evaporating dish, the mass of that dish was found to be 34.150 grams. After the solution was poured in, the mass was found to be 42.125 grams. Once the liquid was completly evaporated, the mass of the dish (plus the solute) was found to be 37.089 grams. What is the solubility of the solute in this particular solvent (the density of the solvent is 0.5 g/cc)?

7th Grade Parent Reminder:

On Thursday, April 16, 2009, the seventh grade will host their annual science fair. The fair will be held at the Thayer Academy Middle School between 4-6pm (after sports). Each student group will be assigned a room to present their project in Power Point format. The students have been working diligently on these experiments since December and would like to share the completed projects with their family and friends.
In order to keep an organized schedule for the afternoon, please let your student’s science teacher know if you are UNABLE to attend.

Thank you,

John Hamilton (jhamilton@thayer.org,)

Quiz RETAKE Reminder

Remember: Any student scoring below a B- on the Density II Quiz is eligible to retake the quiz IF AND ONLY IF they write out all of the practice problems*, show all work and box the final answer. These practice problems should be done neatly on a piece of loose leaf paper and handed in to Mr. Hamilton no later than Wednesday, 4/15/09.

*these are the same practice problems that were available on the Thayer website prior to the quiz last week.

More Quiz Practice

Go to the Thayer website for more quiz practice problems. . .

Power Point Presentation Evaluation/Rubric

This document is available in the downloads section at the Thayer website: www.thayer.org

Quiz Practice

Use this sheet to practice solving density style proportion problems:

Attention: Sections Yellow and Blue!

The cube and slab data table is now available at the Thayer website. Please use it to finish making your histogram.

EXTRA CREDIT Bar: Great astronomy videos now available!

Interested in extra credit? Watch the two videos titled: "Neutron Star Formation and Black Hole Formation" & "The Exotic World of Neutron Stars". You may bring a 3 X 5 index card to the extra credit quiz.

Extra Credit:

Watch the videos (Neutron Star Formation and Black Hole Formation & The Exotic World of Neutron Stars) with a 3x5 note card and a pencil in hand. Bring the note card into class and use it to earn extra credit points on the next quiz.

Great Review Materials Available On-Line:

The following sites offer an excellent review of the work we did in the lab this past week. It is a great idea to visit the first link and then from there access each of the others. However, you can also skip directly to the assessment link and take the practice quiz. Your results on that quiz can help you decide if you should go through the entire review. This is a good way to study. . .

Mass, Volume, Density:
http://www.edinformatics.com/math_science/mass_volume_density.htm

Density of a solid:
http://www.edinformatics.com/math_science/density.htm

Density of a liquid:
http://www.edinformatics.com/math_science/dens_liquid.htm

Density Challenge:
http://www.edinformatics.com/math_science/dens_chall.htm

Assessment:
http://www.edinformatics.com/math_science/mvd_quiz.htm

EXTRA CREDIT: Last Chance for Winter Term!

Please watch only the first two videos (the one with the student sitting in the water tank, and the one with the hand holding the concrete cube). Watching the other videos will be a waste of time. Remember: you are allowed to take notes on a 3 x 5 index card and use it on the quiz. These two videos are excellent and are very likely to help you formulate a better understanding of density. You only need to watch the concrete cube video to the 8:10 mark. Good luck.