Preview

Science Notes

Satisfactory Essays
Open Document
Open Document
578 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Science Notes
1. The properties of water are essential to all life on Earth. a. Outline the significance of the labeled parts of this diagram, showing the attraction between three water molecules. | w. | Negative charge oxygen atom | | x. | Positive charged oxygen atom | | y. | Weak hydrogen bond between δ+ and δ- parts of neighboring water molecules. | | z. | Strong hydrogen bond | | δ- | Slight negative charge as large oxygen atom attracts shared electrons closer to itself than the hydrogen atom. | | δ+ | |

Extension: at this point you might want to consider how ionic and covalent bonding work, in order to really understand how the slight positive (δ+ ) and slight negative (δ- ) charges are generated. 2. Water has many properties which are essential for life. Complete the table below.

| Explanation | Significance to living things | Thermal Properties | When a solid changes to a liquid and a gas more heat is added. This is quite hard as to change phases you have to break the hydrogen bonds and it takes a lot of energy to change from one phase to another. | Water’s thermal properties means that it has the ability to cool us down. When sweat evaporates off our body it takes heat away from our body. | Cohesion | Water’s polar nature makes water “sticky”. This happens because the water molecules stick together due to the hydrogen bonds. | If water were not “sticky” water would not form droplets. In addition, cohesion allows plants to transpire and pull water up to the leaves. | Solvent Properties | Again due to water’s polar nature water is known as the “universal solvent” and as a result is it good at dissolving substances. Polar substances are hydrophilic and non-polar substances are hydrophobic. | Water’s solvent properties mean that it can transport waste through veins and arteries. It enables trees to transport gases and solutes as well. |
(include uses as a coolant, medium for metabolic reactions, transport medium)

You May Also Find These Documents Helpful

  • Powerful Essays

    1Water has many unique chemical and physical properties. Water goes through various reactions and possesses unusual properties to sustain life on Earth. Water has the ability to dissolve a wide variety of substances. Therefore, in nature, water has a variety of dissolved substances such as different elements, salts, gases. Any solution in which water is solvent is called aqueous solutions.…

    • 2109 Words
    • 9 Pages
    Powerful Essays
  • Satisfactory Essays

    6. Something that is hydrophobic will not dissolve in water. Explain why it does not and give an example of a hydrophobic substance. Hydropobic substances will not dissolve/ dissocaite in water because they are nonionic, nonpolar, or cannot form hydrogen bonds for some other reason. A hydrophobic substance’s behavior results the wide-spreadness of relatively nonpolar bonds, which don’t bond well with water, a polar molecule and a hydrphilic substance. Nonpolar covalent bonds are all sharing electrons equally, so there are no positive or negative poles to create attraction. Some examples of hydrophobic substances include: oil, butter, tar, gasoline, and anything else oily or oil…

    • 1197 Words
    • 5 Pages
    Satisfactory Essays
  • Good Essays

    Ap Biology Lab Report

    • 620 Words
    • 3 Pages

    In a flowering plant, the water travels from the soil, then to the root hairs, next to the xylem, then into the stomata, to the mesophyll cells, next to the stoma, then finally into the atmosphere. Osmosis is the diffusion of water through semipermeable membranes. Transpiration is the evaporation of water from the leaf. Cohesion is when water molecules stick together. Adhesion is when water molecules stick to, not attract. Root pressure is force made by root on water columns. Water potential is the negative pressure in leaves, which is positive in roots.…

    • 620 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Heat of Vaporization-the quantity of heat a liquid must absorb for 1 g of it to be converted from the liquid to the gaseous state.…

    • 283 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Penny Lab

    • 346 Words
    • 2 Pages

    5. Explain what surface tension is/ Surface tension is water’s ability to stick to itself.…

    • 346 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    Water is a polar molecule, meaning many compounds readily dissolve in it forming aqueous solutions. The water molecules surround the molecules or ions in the solution for dissolution. In other cases, the water molecules react with the solute molecules or solute ions. In pure water, a small amount of molecules take part in an equilibrium reaction1.…

    • 1669 Words
    • 6 Pages
    Powerful Essays
  • Good Essays

    Hydrogen bonds are responsible to the attraction of water molecules to each other. This is what causes cohesion and surface tension of…

    • 1357 Words
    • 6 Pages
    Good Essays
  • Better Essays

    The human body consists mostly of water, and is a major constituent to the human body and vital organs; of this 90% include blood plasma, lymph, urine, saliva, digestive juices, bile, cerebrospinal fluid and tissue fluid. Water enables substances to be transported throughout the body, red blood cells for example, as wells as supplying the medium required for metabolic reaction to take place (respiration). Without water the progression of these fluids would not be possible. Water is constantly being transported between the fluid compartments of the body.…

    • 2787 Words
    • 11 Pages
    Better Essays
  • Satisfactory Essays

    graph poop

    • 802 Words
    • 8 Pages

    When water boils, some of its molecules have enough _________________________ to overcome the attraction of neighboring molecules.…

    • 802 Words
    • 8 Pages
    Satisfactory Essays
  • Good Essays

    U1L1 Ws

    • 427 Words
    • 2 Pages

    Blood contains water. When we ingest and digest food, the nutrients are absorbed into the blood circulatory system through the villi in our small intestine. These nutrients are then transported all over the body for the cell metabolism. Hence, water plays the role of dissolving nutrients into the blood.…

    • 427 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Apes Ch 2 Checkpoints

    • 903 Words
    • 4 Pages

    Water has high surface tension. It also has capillary action, high boing point and the ability to dissolve many different substances.…

    • 903 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Ochem

    • 897 Words
    • 4 Pages

    Since water is a polar solvent that is capable of hydrogen bonding, it will be a better solvent for polar solutes,…

    • 897 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Water has many unique properties that make life possible on Earth. One property is cohesion. The cohesion property is properly defined as the binding of water molecules by hydrogen bonds. Water has this property as a result of the chemical bonding between water. Cohesion of the strong hydrogen bonds allows the water molecules to stick together, almost as a unit of one. A force exerted on one of the molecules will be exerted on all of the adjacent molecules as a result of cohesion. Cohesion, often with the cooperation of adhesion, the clinging of one substance to another, adds to the function and ability of water to overcome strong natural forces, such as gravity. When water is in its liquid state of matter, the hydrogen bonds are very frail and weak, about one-twentieth as strong as covalent bonds. The bonds are made, broken, and remade very quickly. Each hydrogen bond lasts only a few trillionths of a second, but the constant synthesis of new bonds with a succession of partners acquires equilibrium. Therefore, a significant percentage of all the water molecules are bonded to their neighbors, making water a more orderly structured liquid than most other known liquids. A property related to cohesion is surface tension, a measure of how difficult it is to stretch or break the surface of a liquid. Water is known to have a greater surface tension than most other liquids. An ordered arrangement of hydrogen-bonded water molecules is present at the boundary between water and air. As a result water behaves as though it is coated with an invisible film along the surface. An example how the cohesion of water affects the functioning of living organisms is present in plants. Evaporation from the leaves in plants pulls water up from the roots. Cohesion due to hydrogen bonding helps hold the column of water molecules together within the xylem vessels located in the stem or trunk of a plant. Adhesion helps the process by resisting the pull of gravity against the upward motion of…

    • 996 Words
    • 3 Pages
    Good Essays
  • Good Essays

    A molecule of water consists of one oxygen and two hydrogen atoms joined by covalent bonds. Water as a liquid is vital to existence and plays extremely important roles in many aspects of both plant and animal lives. These aspects include temperature control, support, chemical reactions, transport and protection.…

    • 911 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Water has the property of its solid frozen form being less dense than the liquid form. This important property makes ice float on water and allows many aquatic life forms to survive in cold conditions in the water in spite of the surface being frozen. There is a wide range of temperature in which water remains in liquid form and it has the ability to dissolve many essential nutrients & minerals. All this and more make water an iessential factor for survival of life.…

    • 941 Words
    • 4 Pages
    Good Essays