# February 2015

## Biology Tutor

Introduction to Photosynthesis   Part I        Every living creature needs food or energy to survive. Some depend on others for food and energy, whiles others can produce their own food. Plants make their own food, glucose, in a process called photosynthesis. We say that plants can photosynthesis. Photosynthesis and respiration go hand in hand. The result of […]

## Classification of matter

Elements, Compounds, Substances and Mixtures In the study of science, it is very important to know that all solids are not the same, and all liquids, and gases are never the same. In addition to that, it is important to understand why all liquids are not the same, and why some are purer than others, in terms

## Mathematics

Mathematics Integers Problem: The highest elevation in North America is Mt. McKinley, which is 20,320 feet above sea level. The lowest elevation is Death Valley, which is 282 feet below sea level. What is the distance from the top of Mt. McKinley to the bottom of Death Valley? Solution: The distance from the top of

## Acids and Bases

Introducation To Acids And Bases Acids and Bases     Acid An acid is a substance that ionizes in water to produce hydrogen ions (H+) The strength of an acid depends on how completely the substance ionizes.  Strong acids completely ionize in water.  Weak acids ionize only slightly.            Acids Characteristics