Tutor and Freelance Writer. Science Teacher and Lover of Essays. Article last reviewed: 2019 | St. Rosemary Institution © 2010-2020 | Creative Commons 4.0

Energy Flow in Living Systems

Living organisms must continually capture/acquire, store, and use energy to carry out the functions of life. Capturing/acquiring, storing and using energy are accomplished through cellular chemical processes. Cells are chemical machines that obey fundamental chemical and physical laws of nature. The sum of a cells chemical reactions is called metabolism. Energy Energy is the ability…

Shapes of Molecules

The shape of a molecule determines many of its properties; For example: C4H10 is the formula for 2 separate molecules n-butane and isobutene Melting Point    -138°C                   -159°C Boiling Point     -0.5°C                    -12°C Enzymes—shape compatible with those molecules whose reactions they promote i.e.  the enzyme sucrase breaks down the sugar molecule sucrose The shape of a…

Rate Laws and Order of Reaction

Chemical reactions only take place when there are collisions between reactants Depends on: Number of collisions per unit time Fraction of collisions which are successful There is a relationship/pattern between reaction rate and the factors that affect it This pattern can only be determined empirically (through experimentation) Rate Law Empirical evidence supports that the reaction…

How to apply for a job

Part A: Include 2 completed job applications in your portfolio. Examples: Tim Hortons; City of Brampton; McDonalds; Walmart etc. Part B: Step 1 – FINDING EMPLOYMENT Find a classified job advertisement using any of the following website or any other useful site: www.thestar.ca www.globecareers.com www.canjobs.com www.Candiancareers.com www.jobs.gc.ca www.workopolis.ca Step 2 – ANALYZING THE JOB ADVERTISEMENT…