PPT-Nature of molecules and Properties of Water

Democritus 450 BC Cannot Be Cut Nature of Atoms Matter occupies space and has mass ATOMS Central Nucleus Protons positive charge and Neutrons neutral charge Electrons negative charge surround the nucleus electron cloud . . Water is the solvent of life.. Virtually all cells have water in them (cytoplasm) and water in the surrounding environment (intercellular fluid, pond water, etc).. Many of water’s properties depend on the structure of water molecules. . 1. Cohesive behavior.. 2. Ability to moderate temperature. 3. Expansion upon freezing.. 4. Versatility as a solvent. Nature of Water . . Polar Molecule Hydrogen Bonds. Collin College. Lecture Presentation. Chapter . 1-1. Matter, Measurement,. and Problem Solving. What Do You Think?. What do you think . is the most important idea in all of human knowledge?. If we limit ourselves only to scientific answers, it would be this:. All life uses 6 major elements. If we survey the molecules from which life is constructed, we find six that are found in all living things and have often been described as the ‘building block’ elements of . 1. Cohesive behavior.. 2. Ability to moderate temperature. 3. Expansion upon freezing.. 4. Versatility as a solvent. Nature of Water . . Polar Molecule Hydrogen Bonds. Team members: . Heather . Addy. , Anna Davis, Cindy Graham, Joan Marshall, Vesal Mahanian. Membrane Structure and Function. 26 July 2012. Learning Goals. Understand why phospholipids spontaneously arrange into micelles and vesicles when mixed in water. Water Properties - Facts and Figures About Water. Water is made up hydrogen and oxygen known as H2O.. Water is unique in that it is the only natural substance that is found in all three physical states—liquid, solid, and gas.. Democritus – 450 B.C. – “Cannot Be Cut” . Nature of Atoms . Matter- occupies space and has mass . ATOMS. Central Nucleus: Protons- positive charge and Neutrons- neutral charge. Electrons- negative charge - surround the nucleus –electron cloud . Water. A water molecule (H. 2. O), is made up of . three. . atoms --- one . oxygen. and two . hydrogen. .. H. H. O. Water is Polar. In each water molecule, the . oxygen atom attracts more. than its "fair share" of . Properties of Water. Polar. Cohesion. Surface Tension. Adhesion. Capillary Action. High: Specific Heat/ Heat of Vaporization/ Heat of Fusion. Less Dense as a Solid. Universal Solvent. Chemistry of Water. updated 9-9-2014. Unit 1. Properties of Water Lab. Date (unique to you). Page (unique to you). Table of Contents. Read . information about the properties of water and carry out the experiments using the materials at your lab station. . Discuss the special properties of water that contribute to Earth's suitability as an environment for life: cohesive behavior, ability to moderate temperature, expansion upon freezing, and versatility as a solvent. . A Presentation to Accompany the Case Study: NATIONAL CENTER FOR CASE STUDY TEACHING IN SCIENCE Do Grasshoppers Sweat? by John G. Cogan, Emily Hill, and Henry D. Prange The Molecule of Life Water is the biological medium of life on mechanical. and . chemical. . processes.. This occurs in the Alimentary Canal…. Alimentary canal . – long muscular tube that runs from the mouth to the . anus. . Peristalsis . – muscular movement of food.