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Welcome to my Pre-Nursing Exam Prep blog. I hope it will help you prepare very well for the Pre-NLN entrance exam, popularly known as the PAX exam. This is one of the entrance exams required by some schools for those who want to pursue careers in the nursing field in the USA. I will attempt to break down the review materials into manageable parts so that you can systematically and efficiently prepare for the test with less stress. I will guide you to prepare for the entire content of the test. Hopefully, you will be able to pass after going through these series.


BEST OF LUCK!


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A 12-DAY APPROACH TO ACE THE EXAM

SCIENCE REVIEWThe topics that are generally covered in the test have been grouped into twelve instructional modules below. You will be tested only on the basic concepts of physics, chemistry and biology. Click on science topics and select any of the topics listed in the module to review.

Lesson 1:

Basic structure of atom

Types of tissues

Lesson 2:

Movement of substances across the cell membrane

Acids and bases, pH scale

Carbohydrates, proteins, lipids and nucleic acids

Lesson 3:

Basic structure of the eye

Basic structure of the ear

Nervous system

Lesson 4:

Circulatory system

Introduction to mechanics (motion/forces)

Electrical circuits

Lesson 5:

Balancing chemical equations and writing formulas

Essentials of photosynthesis and respiration

Classifying organic compounds

Magnetism

Electromagnetism

Lesson 6:

Interpretation of graphs and pictograms

Analyzing and making conclusions from experiments

Data analysis

Lesson 7:

Endocrine system

Digestive system

Genitourinary system

Lesson 8:

Reproduction in mammals

Basic parts of a flower

Reproduction in plants (the process of pollination

Genetics

Lesson 9:

Modes of heat transfer

Calculating heat energies and phase diagrams

Temperature conversions (Kelvin, Celsius, Fahrenheit)

Lesson 10:

Gas laws (Boyle, Charles, Gay-Lussac)

Types of energy (Potential, kinetic, etc…..)

Chemical bonds, equilibrium and equilibrium constants

Mixtures, types of solutions, solubility

Lesson 11:

Concepts of the food pyramid, food web and food chain

Light (diffraction, refraction, reflection, dispersion)

Basic concepts on waves

Sound waves

Catalyst and enzymes

Lesson 12:

Symbiosis

Ecology

The Electroscope

Radioactivity and half-life Tropism

Tropism

Tuesday, May 27, 2014

GAS LAWS

The following are the basic laws that govern the behavior of gases.
1. Boyle's law: This states that at a constant temperature, the pressure of a gas is inversely proportional to its volume. This means that as the pressure increases, the volume decreases and vice versa.

(Initial Pressure) x (Initial Volume) = (Final Pressure) x (Final Volume)

Examples: 

  • As the pressure in a balloon is increased, it expands continuously until it can no longer do so and then burst open. 
  • Air rushes into the lungs from outside when the chest cavity expands to increase its volume because the pressure within the thoracic cavity decreases. When the volume of the thoracic cavity decreases, the intra-thoracic pressure increases and the air is pushed out. 
2. Charles' law: This states that at a constant pressure, the volume of a gas varies directly as its temperature. This means that when the temperature increases, the pressure also increases and vice versa.

   Initial Volume      =   Final Volume      
Initial Temperature       Final Temperature

Examples: 
If you increase the temperature on a balloon at atmospheric pressure, the volume increases as well.

3. Gay-Lussac's law: This states that at a constant volume, the pressure of a gas varies directly as its temperature. This means that when the temperature increases, the pressure also increases and vice versa.

   Initial Pressure      =   Final Pressure      
Initial Temperature       Final Temperature


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