1 / 14

Chemical basis of Life

Chemical basis of Life. Please Take out your notebooks. ATB 9/25. Get a textbook Turn to page 26 Answer the following questions in your notebook. What is the difference between a light microscope and an electron microscope? What is the difference between and TEM and an SEM?. ATB: 9/26.

toby
Download Presentation

Chemical basis of Life

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chemical basis of Life Please Take out your notebooks

  2. ATB 9/25 • Get a textbook • Turn to page 26 • Answer the following questions in your notebook. • What is the difference between a light microscope and an electron microscope? • What is the difference between and TEM and an SEM?

  3. ATB: 9/26 • Get textbook • Turn to page 27 • Complete analyzing data questions 1-5

  4. ATB 9/27 • Turn to page 27 in book • What is the difference between a cell culture and cell fractionation? • Describe the process of cell fractionation.

  5. Biosphere Ecosystem Community Population Organism Levels of organization Organ System Organs Tissues Cells Atoms

  6. Vocabulary • Atoms are made up of protons, electrons, and neutrons. • Elements are pure substances that consists entirely of one type of atom. • Compound is a substance formed by the chemical combination of two or more elements in definite proportion. • Molecule is the result of atoms that are joined together by covalent bonds.

  7. Bonding • Ionic bonds are formed when one or more electrons are transferred from one atom to another. • Covalent bonds are formed when electrons are shared between atoms.

  8. Van der waals forces • When molecules are close together, a slight attraction can develop between the oppositely charged regions of nearby molecules.

  9. Elements you need to know • C • Ca • Cl • F • Fe • H • I • K • Mg • N • Na • O • P • S • Zn

  10. Water Molecules • Hydrogen and oxygen are held together by polar covalent bonds. • Polar because there is an uneven distribution of electrons between oxygen and hydrogen. • Multiple water molecules are held together by hydrogen bonds.

  11. Properties of water Adhesion Cohesion • An attraction between molecules of different substances. • Attraction between molecules of the same substance.

  12. Penny Lab • Problem: How many drops of water can a penny hold? • Design an experiment with your penny. • HW: Write your introductory paragraph for your lab report. Include information on Polarity, Van der Walls forces, adhesion, and cohesion.

More Related