Meiosis vs. Mitosis: Comparison

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…

Properties of Ionic and Molecular Substances Lab

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…

Organic vs. Inorganic Chemistry

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…

Temperature of Hot Water and Cooling Rate Lab

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)…

Asthma: Causes, Pathophysiology, Treatment

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 (Ischemic Heart Disease): Overview & Coronary Artery Disease (Ischemic Heart Disease): Overview & Pathophysiology

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…

Physical Chemistry: Equations and Important Facts

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…

Single Displacement Reactions Lab Explained

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…

Pros and Cons of Hydro electric & Wind energy

SOURCE ADVANTAGES DISADVANTAGES   HYDROELECTRICITY Produce inexpensive electricity Disrupt natural river flow Reservoirs used for flood control, irrigation, drinking water, and recreation Slow down river flow that can kill fish and other animals that depend on a steady flow Renewable energy source Alter water quality Increases reliability of energy sources Significant obstacle to fish and…