This document provides examples of how to read different types of laboratory balances - a triple beam balance, which measures in increments of 1 gram, and a four beam balance, which measures in increments of 0.1 gram or 0.01 gram. It asks the reader to identify the masses shown on sample balances and provides the answers. The document is intended to teach students how to properly read different types of laboratory balances.
Answers to sponge activity questions that were to be used with the teaching powerpoint presentation "Water Cycle (teach)" found at
http://www.slideshare.net/MMoiraWhitehouse
Quantum mechanical model of atom belongs to XI standard Chemistry which describes the quantum mechanics concept of atom, quantum numbers, shape and energies of atomic orbitals.
Answers to sponge activity questions that were to be used with the teaching powerpoint presentation "Water Cycle (teach)" found at
http://www.slideshare.net/MMoiraWhitehouse
Quantum mechanical model of atom belongs to XI standard Chemistry which describes the quantum mechanics concept of atom, quantum numbers, shape and energies of atomic orbitals.
There are several misconceptions about the valence shell of the atom. The key questions that arise in the minds of the learners are:
Is valence shell really the outermost shell?
2. Are there only seven shells in an atom?
3. When shells are supposed to be made up of subshells, why can we not represent the subshells in the valence shell structure of the atom?
4. When electrons are said to occur in orbitals, why can we not indicate the orbitals in the valence shell structure?
4. How can we represent the origins for valance band and conduction band in the atomic structure?
5. What are some good metaphors for the core of the atom and the rest of the atom?
Here is a lesson created by Chemistry teachers to address these misconceptions.
A quantitative approach to chemical reactions.
**More good stuff available at:
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PKA has 2 catalytic subunits (Tpk) which are encoded by 3 genes: tpk1,tpk2 and tpk3. On binding cAMP, PKA is able to phosphorylate some proteins. However, in mutants like ours, it can be assumed that some of that proteins may not be phosphorylated.
PKA serves as a central regulator of the metabolic and transcriptional status of the yeast cell.
Reference ranges for cardiovascular indices for adolescents derived using the Ultrasonic Cardiac Output Monitor (USCOM).
Cattermole GN, Ho GYL, Mak PSK, Graham CA, Rainer TH.
July 2011