Category : Hobbies & Science : Society & Culture & Entertainment

Principles of Coexistence in Ecosystems

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Various organisms can coexist peacefully.Butterfly on whote flower image by Claude Wangen from Fotolia.comAn ecosystem is an area where a variety of organisms share a common territory. Some species compete with other species for resources. Other species see one another as resources in...

How to Wire a 480 to 120 Step Down Transformer

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Transformers that step voltage down from 480 volts to 120 volts appear mostly on a electric company's equipment, either on a pole or inside a transformer housing. Most transformers step 480 down to 240 for standard household use. The use of 120 volts would be for a very small installation, such as a

Building Instructions for Soapbox Racers

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The tradition of racing home made soap box race cars dates back to 1933 when news photographer Myron E. Scott watched young boys in Dayton, Ohio racing their home made cars. Inspired by what he saw, Myron set up the All American Soap Box Derby which still holds events all over the United States to t

How to Tell If an Autographed Baseball Is Not a Stamp?

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Before you purchase an autographed baseball, it's important to know if the ball was stamped or authentically signed. Stamped baseballs are produced in bulk by a manufacturer using a facsimile or sample signature. When you buy a stamped ball, you are buying something created by a machine rather than

How to Evaluate Expressions & Combine Like Terms

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In math, "evaluate" means to simplify an expression, or mathematical phrase, to a single numerical value. Expressions often contain variables, which can make evaluation seem more complicated than it really is. To make it easier, first combine like terms. A term is a part of an expression; like terms

What Is the Corelation Between Distance & the Optical Lens of Binoculars?

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Magnification of binoculars can also be expressed as their distance, or how much closer the subject appears to be. Binoculars achieve their magnification by using lenses on the outside of the frame and multiple lenses on the inside.

How to Calculate kVA Using Watts

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One watt equals one kilovolt-ampere, yet watts and kilovolt-amperes do not measure quite the same thing. Watts represent the actual amount of power an electrical device can draw. Kilovolt-amperes, on the other hand, represent apparent power -- the amount of power a device can draw when the voltage a

Homemade PVC Projects

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PVC pipe's low-cost and lightweight, durable composition make it an ideal medium for more than just basic plumbing repairs. From the business executive in need of desk organization strategies to the hunter trying to keep shooting skills sharp during the off-season, you can combine PVC pipes and conn

How to Build an Easy Window Seat

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Window seats are the ideal use of that awkward space beneath a window—you can create a cozy place to sit, as well as utilize the area beneath the window seat for hidden or open storage. The simplest window seat is a couple of wooden planks fit together like a bench. Store shoes or other items

How to Make a Laminate Bow

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Making any type of curved wood object is much easier done through lamination of many thin pieces of wood. Bending solid wood is almost impossible. But bending thin pieces of wood is much easier. Lamination involves gluing together many thin layers of wood to create large bends with the strength of s

How to Make an Aquifer in a Bottle

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Whether natural or manmade, aquifers contain porous materials, like gravel, sand and silt, that attract and hold groundwater. When they contain wells, they also provide drinking water. One way to show students how an aquifer works is to make a simple model in a bottle.

Why Ride Vintage Bicycles

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Lazarus Bible Craft

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While many children grow restless during Sunday school lessons on scriptures and Bible stories, craft activities are a fun, engaging way to get the kids involved. Bible crafts can supplement a specific story or scripture and provide the children with hands-on learning experiences. Have your children

The Difference of Growth in Plants & Animals

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Plants and animals adapt to the environmental pressures in which they face. Their adaptations are reflected in their structure, physiology and growth patterns. Their response time to stress often determines their continued existence in a race of survival of the fittest. The availability of natural r

How to Make Tongue & Groove with a Table Saw

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How to Make a Wooden Globe Stand

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A wooden globe stand is a small table made from wood, such as birch, that is easily moved from one location to another. A globe stand can be used as a portable display that allows others to view the globe when placed on a table. If you have a table top globe, you can construct a stand that folds up,

How to Make Pottery Clay Instruments

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Pottery clay instruments can add a lot to your ability to easily decorate or enhance your clay creations. Carving, attaching or stamping a plain dish, cup or bowl can make a good pot spectacular. Although there are plenty of pottery instruments out there to buy, you can make your own carving, textur

Basic Function of an Organelle

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Organelles are sub-compartments of the cells of certain eukaryotes and prokaryotes, each dedicated to its own specific function. It is thought that some, such as mitochondria, may have evolved from bacteria becoming incorporated within the cell body.

What Is the Meaning of Fractional Distillation?

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Fractional distillation is the process of separating the chemicals of a compound by applying heat and separating the various compounds based on their boiling points, according to the website biology-online.com. One of the common uses of this process is in oil refining, although it is also used in ot

How to Use Hydrochloric Acid to Adjust pH

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Hydrochloric acid (HCl) can only adjust pH down. As pH is a measurement of hydrogen ions in a solution, the lower the pH, the higher the level of free hydrogen ions. A pH level of zero equals at least one mole of hydrogen ions in solution. HCl is a strong acid and completely disassociates, so it can