Archive for January, 2011

Classification

Friday, January 28th, 2011

Endangered species by konjure on flickr

There are millions of species of our planet.  In order to make some sense of this huge variety, we classify organisms in a very specific way.  To learn more we’ll use this presentation from Mr Taylor.  Classification

HOMEWORK ASSIGNMENT:  Please do the following activity.  Details are in the document. The world by Data base  Basically you will log onto to a database and use it to find a relationship between two sets of information.  I will explain more in class, but this will be due on TUESDAY 8th FEBRUARY.

Solubility graphs

Wednesday, January 26th, 2011

Here are the worksheets we used in class.  Print extra copies if you need to practice further. GCSE Water 04 big  GCSEWater03

This is the lab sheet for the KNO3 crystallization experiment.  Make sure you READ through the procedure before class so that you know exactly what to do when you get here.  solubility curve of potassium nitrate in water

Atomic structure

Tuesday, January 25th, 2011

Sodium2 by Mrs. Pugliano on flickr

We’ll kick off our new unit on STRUCTURES by looking at the structure of the the atom.  YOU KNOW THIS STUFF ALREADY so the first part will be a recap, then we’ll go beyond the material you covered in Grade 8.

Here’s the presentation we will use in class: KS4 The atom

And here are some practice worksheets to see if you have understood the concepts.  DO THEM! struc of atoms1   basic at struc

This is a useful resource to help you get up to speed with these ideas.

More resources: A Few Definitions   Atomic Structure Projections

Elements_compounds_or_mixtures

Evolution

Thursday, January 20th, 2011

Evolution street sign by Colin Purrington on flickr

Evolution is the cumulative change in the heritable characteristics of a population.

This is a key unit in Biology.  We will explore the evidence for evolution provided by the fossil record, selective breeding of domesticated animals and homologous structures.  We will understand that populations tend to produce more offspring than the environment can support and how this can lead to a struggle for survival.  We’ll learn that members of a species show variation and how sexual reproduction promotes this variation.  We will address natural selection and how it leads to evolution.  And we’ll finish up by learning some examples of evolution in response to environmental changes, such as antibiotic resistance and changes in the colour of peppered moths.   This is a great slideshow on the development of antibiotic resistance.

Sound fun? It is!  Here is the link to a great presentation on this topic.  This one from Mr Hobbins is great too. 5.4 Evolution

Populations

Tuesday, January 11th, 2011

kidney beans by Dey on flickr

We are going to learn about populations and what affects them.  In particular:

  • How is population size affected by natality, mortality, immigration and emigration?
  • What does a typical population growth curve look like?
  • What are the reasons for the exponential, plateau and transitional phases?
  • What is the carrying capacity of an environment?
  • What factors limit populations from increasing indefinitely?

This is a useful presentation.  Here’s another: 5.3 Populations

And we are going to use the Lincoln Index to estimate the size of a population of kidney beans.  This is a simulation exercise, with the beans representing organisms such as woodlice.  But the beans don’t move, so are a bit more collaborative 🙂

IB Biology Lab Sheet – Lincoln Index

Solubility

Tuesday, January 11th, 2011

Graduated cylinders and beaker filled with chemical compoundsSolute + solvent = solution

We’ll investigate factors affecting solubility by designing an experiment, then performing it and reporting on it.  Here are the rubrics that will be used to guide this. FINAL Rubric design  FINALRubric DCP   FINAL Rubric CE

This link has some useful information to help you explain your findings.

We’ll learn about saturated solutions and what actually happens when a substance dissolves.  We’ll also make some predictions as to the kinds of substances that can dissolve in water.

Energy Performance Task

Tuesday, January 11th, 2011

Click on this link to take you to what you need to know.