Dissociation – The separation of ions that occurs when an ionic compound dissolves Net Ionic Equation – Includes only those compounds and ions that undergo a chemical change in a reaction in an aqueous solution. Spectator Ions – Ions that do not take part in a chemical reaction and are found in solution both before…
Role of the Circulatory System: A network of blood vessels that distributes gases, nutrients, waster products, and cell products (hormones) and distributes heat Unicellular organisms such as bacteria do not need a circulatory system since they are in direct contract with their environment and activity can take place across the cell membrane Larger organisms need…
Introduction This report presents a paper beam designed to span a 270mm gap between two wooden columns. The beam had to be made of 3 pieces of A4 paper and could only be held together with sticky tape and glue. Experimental Sketches Experimental Procedures Rig: The rig that was used to test the strength of…
Physical properties 1) Physical state – Metals are solids at room temperature e.g. sodium, aluminum ,potassium, magnesium. There are exception to this. Mercury and gallium are metals but they are in liquid state at room temperature. 2) Luster – Metals have a shining surface called luster when freshly prepared. They have a quality of reflecting…
Comparisons Meiosis Mitosis Number of divisions Two Divisions. One cell Division. Number and type of daughter cells produced Results in the formation of four haploid sex cells (gametes) produced. Two diploid identical daughter cells for one cell division. Differences in chromosome arrangement In Metaphase 1, the maternal chromosomes pair with the paternal chromosomes at the…
Animal Mitosis Plant Mitosis Have centrioles, centrosomes, and asters No centrioles, centrosomes or aster: No Migration of centrioles. Cell becomes rounded before cell division No change in shape before cell division Cell division induced by multiple hormone to start cell division; no known specific cell division hormone. Cell division induced by specific hormone called…
Procedure Examine the following chemicals at their various stations: NaCl Ethanol CuSO4 NH4NO3 Kerosene Sulfur CaSO4 Ca(NO3)2 Sucrose Unknown O2 K3Fe(CN)6 Record your observations in a table with the following headings: Name, Formula, Ionic or Molecular, State at RT, Solubility, Colour of Solution, Conductivity of Solution, Melting Point, Boiling Point Analysis Questions Make a…
Henry David Thoreau, author and environmentalist, was the first to write about the elephant in the room and have a large audience read it. His writing made people acknowledge that we need to start conserving our natural resources. With cod almost extinct, and the Staples Thesis complete, it was time for America to change. This…
The 2 main branches of Chemistry are Organic and Inorganic chemistry. The difference between an organic and an inorganic compound is that organic compounds have Carbon in their chemical structure, while inorganic compounds usually do not have this element. Organic Chemistry studies the structure, properties, composition, and reactions of compounds that contain carbon. These molecules…
Introduction The purpose of this lab was to use the microscope and identify cells such as animal cells and plant cells. This subject is important because in Biology, we will be using the microscope many times during different laboratory exercises. The microscope is used for looking at many specimens that cannot be seen with the…
Introduction: The rate at which an object cools (i.e. how quickly its temperature decreases) depends upon several factors, including: Surface area Volume Type of insulation Temperature difference with the surroundings For this investigation, the effect of the temperature of water upon the rate of cooling will be investigated. The temperature-drop over 5 minutes (600 seconds)…
ABSTRACT: This experiment was conducted to investigate the selective permeability of dialysis tubing. The permeability of the tubing to glucose, starch and iodine (potassium iodide) was tested. The dialysis tubing was clipped to form a bag so that glucose and starch was fed into the bag through the other end, and was also clipped to…
Definition Preeclampsia is a complication of pregnancy. In preeclampsia, the woman has dangerously high blood pressure, swelling (edema) and protein in the urine (proteinuria). Blood pressure rises from 140/90 mm Hg to 160/110 mm Hg. High blood pressure is first noted sometime after week 20 of pregnancy and is accompanied by protein in the urine…
A disease characterized by variable, recurrent, reversible airway obstruction with intermittent episode of wheezing and dyspnea. It is associated with bronchial hypersensitivity and inflammation caused by various stimuli. Asthma is the most common chronic disease of childhood with 5% to 10% of school-aged children having symptoms of asthma. Asthma may develop on infants, but it…
Coronary artery disease is a condition in which fatty deposits (atheroma) accumulate in the cells lining the wall of the coronary arteries. These fatty deposits build up gradually and irregularly in the large branches of the two main coronary arteries which encircle the heart and are the main source of its blood supply. This process…
SKELETAL SYSTEM Sitting, standing, walking, picking up a pencil, and taking a breath all involve the skeletal system. Without the skeletal system to support our bodies, we would have no rigid framework to support the soft tissues of the body and no systems of levers so critical for movement. The skeletal system consists of bones…
A distinguishing feature of lower airway and pulmonary vessel disorders is the presence of dyspnea. Dyspnea (shortness of breath) is a subjective experience that results when air flow, oxygen exchange, or both are impaired. The sensation of uncomfortable breathing can be as distressing as pain and can lead to severe functional disability. The intensity and…
Atoms, Molecules, and Quantum Mechanics Avogadro’s number = 6.022 × 1023 Cations are smaller than the original ions; anions are larger than the original ions Five periodic trends Ionization energy, electron affinity, and electronegativity increase from left to right, bottom to top Atomic radius and metallic character increase from right to left, top to bottom…
Purpose: Two observe two different single displacement reactions. Hypothesis: When zinc is added to copper (II) sulfate, a single displacement reaction will take place, creating a solid, copper, and zinc sulfate. When zinc is added to hydrochloric acid, hydrogen gas will be released a solid, zinc chloride, will be formed. Materials: Hydrochloric acid Zinc Copper…
Solve the following questions using what you know about projectile motion. A roadrunner runs directly off a cliff with an initial velocity of 3.5 m/s. What are the components of this velocity? Vx = 3.5 m/s Vy = 0 m/s What will be the horizontal velocity 2 seconds after the bird leaves the cliff? 3.5…