Native Plants Why We Should Garden With Them
1. Pest Resistance
These plants are much more resistant to pests. Do you know someone who grows hybrid roses or tropical imports? They are probably always fighting June beetles and other pests. These plants, on the other hand, grow naturally in your area. Continue reading “Native Plants Why We Should Garden With Them” »
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Teaching Kids about Energy
Your son or daughter comes home from school with questions about energy. How do you begin to explain such a vast concept? Teaching kids about energy starts with conveying that there are many forms of energy around us and even inside us. Life as we know it would not exist without energy. Energy is so important that all food packages list Calories, an old energy unit. Energy is either stored or involved with motion.
The property of an object or a system (a group of objects) which enables it to do work is called energy. You need energy to do work, or to apply a force across a distance, meaning to move something. If energy does involve moving an object, it is called kinetic energy. A ball rolling downhill has kinetic energy. Energy can also come from the position of an object or its arrangement. This type of energy is called potential energy, or stored energy. A ball that is stationary, on the slope of a hill, before it begins to roll down, has what is known as gravitational potential energy. As the ball rolls downhill, the potential energy it had is changed into kinetic energy. That is an example of the law of energy conservation; energy cannot be created or destroyed, it changes form from one type to another.
Since energy does change from one form to another, sometimes it is difficult to determine whether energy is potential or kinetic. Some energy is potential energy and kinetic energy simultaneously, such as thermal energy, or heat. Even a moving object can have both potential energy and kinetic energy at the same time. As the ball rolls downhill, its potential energy is changed into kinetic energy. As it rolls, at any specific time, the total amount of energy that the ball has does not change; the law of energy conservation holds. This type of energy is considered mechanical energy.
When teaching kids about energy it’s important to relay that besides the motion of objects, other types of kinetic energy include radiant energy, or light; radiant heat energy; acoustic energy, or sound; and electrical energy, or electricity through wires. Other types of potential energy include electrical energy stored in a battery, chemical energy, nuclear energy, magnetic energy, and solar energy; all stored energy in atoms or molecules. Elastic energy is potential energy within a fluid or solid that can be converted into mechanical energy.
Can there ever be a perpetual motion machine? That is, a machine that never stops moving and constantly creates its own energy as it works? Most machines noticeably heat up as they operate. This heat is from friction. The energy that goes into a machine is always greater than the amount of work it produces, because some of the initial energy changes into friction. Because friction is never completely eliminated, the energy going into a machine is always going to be larger than the machines output. A machine can never run indefinitely, so a perpetual motion machine cannot exist.
When teaching kids about energy you can explain the different types of energy. Energy is either kinetic, involving motion, or potential, stored. Energy changes form from one to another, leading to the law of energy conservation. Energy cannot be created or destroyed, it transforms from one type to another type. A perpetual motion machine cannot exist, since such a device would counteract the law of energy conservation.
Energy is a fascinating and vast subject but by remembering these energy basics teaching kids about energy can be simple and fun.
Lorie Moffat has taught science for 20 years. She has a B.S. degree from Penn State in Earth Sciences and an M.S. degree from Drexel University in teaching.
FREE Demonstration of How My Online Tutoring Classroom With Full Voice Boosts Grades
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Originally posted 2010-04-26 04:55:17. Republished by Blog Post Promoter
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Green Roof What to Consider When Planning to Install a “Green” Roof
1. Types of Green Roofs Continue reading “Green Roof What to Consider When Planning to Install a “Green” Roof” »
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How to Improve Your Indoor Air Quality
1. Air Purifiers
Lately, air purifiers have been competing with open windows for air quality control. Continue reading “How to Improve Your Indoor Air Quality” »
Originally posted 2010-05-04 06:09:47. Republished by Blog Post Promoter
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Healthy Halloween Treats How to Make Healthy Halloween Treats
1. Mummy Fingers
Part of Halloween is the creepy shape and look of the treats. Using sticks of cheese, cut slits at intervals to make “joints.” Then cut “fingernails” out of green pepper, red apple, or sliced almonds and use a bit of soft cream cheese to attach them onto the tips of the cheese “fingers.” Continue reading “Healthy Halloween Treats How to Make Healthy Halloween Treats” »
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Energy Efficient House: Turn Your Home into a Low-Energy House
1. Do a home energy audit. Go through your home and note the type and location of insulation, the state of the weather stripping on windows and doors, lighting, and so forth. As you do your audit, keep the following tips in mind. Continue reading “Energy Efficient House: Turn Your Home into a Low-Energy House” »
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Converting Your Toilet to a Low Flush Toilet Will Save Water and Money
Originally posted 2010-04-10 18:32:38. Republished by Blog Post Promoter
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How to Make Recycled Mothers Day Handmade Gifts
Glass jars and bottles
There are all kinds of possibilities for gifts made from used glass. Consider investing in some glass paint; when baked in the oven, your painted design becomes permanent. Or, spray paint the glass first and use regular acrylic craft paints over the spray-painted surface. Continue reading “How to Make Recycled Mothers Day Handmade Gifts” »
Originally posted 2010-04-18 07:08:37. Republished by Blog Post Promoter
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How To Be Ethical And Be Green When Shopping
Genetically Modified Foods or GM Foods
GM Foods (Genetically Modified Foods, or GMFs) are a concern for those who want to minimize their impact on the environment. GMFs are a new technology and much is left up to chance, in what amounts to an uncertain experiment with our food. Because labeling laws are dicey, look for foods that are labeled to be free of GMFs – unlabeled foods may or may not contain GMFs, including produce. If you have to guess, choose organic and/or locally grown foods that are far less likely to be genetically modified. Continue reading “How To Be Ethical And Be Green When Shopping” »
Originally posted 2010-04-10 14:23:44. Republished by Blog Post Promoter
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Mountain Bike Riding Tips – Does Mountain Biking Cause Harm to Nature?
Pros
* Allowing mountain biking in national parks increases visitation to the park. Continue reading “Mountain Bike Riding Tips – Does Mountain Biking Cause Harm to Nature?” »
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