Wednesday, December 1, 2010
Wednes-Day 2
Physics - took the multiple choice part of our Unit 5 exam.
Tomorrow, we have the written response of the unit exam.
Expect the following question types (as seen in the packet and practice tests, etc.)
Momentum and Impulse - sticky/inelastic collisions, bouncy/elastic collisions, and explosion problems. Impulse causing change in momentum, causing change in velocity.
Circular Motion - questions relating period, radius, velocity, centipetal acceleration, centripetal force REQUIREMENT, the SOURCEs of centripetal force.
Elevator problems - Fnet, F (gravitational) or weight, and F (normal)- the reading on the scale.
AP Chem - we have a test on Friday involving non-stop explanations of periodic trends. On the last test, the "explanations" of the photoelectric effect, in general, were the worst that I can recall. Copying the question is not and cannot ever even remotely qualify as an explanation. As a reminder, explanations answer HOW and WHY phenomena occur; descriptions merely state WHAT occurs.
Most of you cannot and do not know how to write (or worse, memorize) an explanation. I implore you to write out your explanations and submit them to me for correction BEFORE Friday's exam.
DO NOT WRITE ANY EXPLANATION FROM MEMORY. Thoroughly and repeatedly study the notes on any explanation FIRST, then try to write a proper explanation.
The fact that you are not making sure that you are prepared for each test is astonishing. There has yet to be a surprise question of any type on any test. Thus, you should be checking that you understand the tested information correctly, AND that you can convery that knowledge IN WRITING and DRAWING on a test BEFORE you take that test.
Note: on the Periodicity Worksheets posted on Blackboard, some of the brief explanations were highly insufficient (e.g. Worksheet 2, questions 2 and 3); these answers were removed. Refer to your notes for justification of the answers.
Tomorrow, we have the written response of the unit exam.
Expect the following question types (as seen in the packet and practice tests, etc.)
Momentum and Impulse - sticky/inelastic collisions, bouncy/elastic collisions, and explosion problems. Impulse causing change in momentum, causing change in velocity.
Circular Motion - questions relating period, radius, velocity, centipetal acceleration, centripetal force REQUIREMENT, the SOURCEs of centripetal force.
Elevator problems - Fnet, F (gravitational) or weight, and F (normal)- the reading on the scale.
AP Chem - we have a test on Friday involving non-stop explanations of periodic trends. On the last test, the "explanations" of the photoelectric effect, in general, were the worst that I can recall. Copying the question is not and cannot ever even remotely qualify as an explanation. As a reminder, explanations answer HOW and WHY phenomena occur; descriptions merely state WHAT occurs.
Most of you cannot and do not know how to write (or worse, memorize) an explanation. I implore you to write out your explanations and submit them to me for correction BEFORE Friday's exam.
DO NOT WRITE ANY EXPLANATION FROM MEMORY. Thoroughly and repeatedly study the notes on any explanation FIRST, then try to write a proper explanation.
The fact that you are not making sure that you are prepared for each test is astonishing. There has yet to be a surprise question of any type on any test. Thus, you should be checking that you understand the tested information correctly, AND that you can convery that knowledge IN WRITING and DRAWING on a test BEFORE you take that test.
Note: on the Periodicity Worksheets posted on Blackboard, some of the brief explanations were highly insufficient (e.g. Worksheet 2, questions 2 and 3); these answers were removed. Refer to your notes for justification of the answers.
# posted by C @ 2:10 PM 
