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Tuesday, February 23, 2010

Why Do We Need Sleep?

Obviously, we are aware on how important sleep is. Whether we understand or not the full concept of what sleep can do to our bodies, we knew that having a day without sleep is terrible. Your eyes and body are heavy, your head hurts, you feel exhausted and you cannot concentrate. Your work and everyday function is greatly affected.

So, what is sleep anyway and why do we need it?

Sleep is a state wherein one is relatively suspended from sensory and motor activities. You can be totally or partially unconscious and while majority of your voluntary muscles are inactive. Before, it was thought that sleep is just a constant and regular block of time when you are not awake. With the advancement of science, scientists had determined that sleep plays a critical role in our body's immune system, our learning, memory, metabolism and other vital organ functions.

As we age, the time we are spending for sleep lessen. From 16 to 18 hours a day for newborns, adults on the average sleep for 7 to 8 hours daily. And because we are all aware to this fact, many older people ignore their sleeping problems, thinking that it is normal. Adults still need 8 hours of sleep. How well you function for the day's tasks and works greatly depends on the quantity and the quality of sleep you had.

Sleep is beneficial for us to react quickly, think clearly, improve our concentration and enable us to create memories. As a matter of fact, the learning pathway in the brain is very active during sleep. Losing even 1 hour of sleep has its price. Your ability to do focus and do physical tasks is greatly decreased resulting to lower performance in school or at work. Also, you tend to make wrong decisions when you are sleepy placing you at more risk.

Sleep also affects our mood. Lack of sleep is often linked to irritability, troubled relationships and poor behavior. Moreover, those who are chronically deprived of sleep are prone to depression.

Most importantly, it is good to our health. Sufficient sleep decreases our risk in having high blood pressure, heart problems and other medical conditions. It is also during sleep that certain hormones that enhances our immune system are at its peak. This might be one reason why a good night's sleep helps you from getting sick.

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School Science Project: Energy

Some of the best school science project ideas have to do with energy. Energy can be a pretty flexible topic in terms of how many projects you can create from the many different forms and sub-topics alone. A school science project on energy is always a great choice because most of the time these projects end up being entered into the science fairs, or getting a perfect grade in class.

An easy and classic school science project that involves energy is creating an electric circuit that is powered by fruits. The acidity found in some fruits are usually enough to power a battery which in turn can power a small device. Sometimes the fruit can be the battery itself. Electric energy is always fun to work with. Many times, there is no need to use fruit. Creating a working circuit can be a project on its own for the younger grades.

Being able to harness electric energy from other sources also makes a good school science project. Having a basic electric generator that is charged through solar panels, hydro-power, or wind energy makes another great demonstration of what can be done when energy is converted. If the generator or energy converter can show that it has converted various forms of energy into electric energy and successfully powers an electricity needing appliance then the project is a success! This project is also perfect to go hand in hand with a discussion of renewable energy versus using fossil fuels.

Another great school science project that uses energy is creating a solar oven. Using the power of the sun, this project shows students how the sun's heat energy can be absorbed and used to do something useful, like bake cookies or heat a batch of brownies. It also shows students how some forms of energy can be limited. In this situation, the solar oven will only work on a sunny day, and actually has the possibility of being destroyed on a rainy day. This shows that energy should not be wasted.

Energy is truly a fascinating subject, and is one of the best parts about physical science classes. It can be complicated to understand, but it's always fun to study. This becomes more true when the school science project on energy that your child is working on proves to be a success! It's also a great way to introduce them to other school science project ideas that involve the principles of physics. Getting your child interested in energy and physics at a young age can really help them out with their school work in the future.

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Science Experiments for Kids

Science can be one of the most fascinating subjects your kids will ever take up. It's one of the few subjects in school that encourages coming up with tangible examples of the different concepts it teaches. The science experiments for kids suggested by teachers and in most science textbooks are great ways for children to master their science lessons, and to supplement their learning.

As a parent encourage as many science experiments for kids as possible. Your children will appreciate your support in their studies, and you just might encourage them enough to take a lifelong interest in science. The more involved you can be, the better it will be for your child. If you're unsure where to begin, go through your child's textbook for experiment ideas, or ask your child's teacher for some help! Also be sure to read some safety precautions before any project or experiment.

One of the easy science experiments for kids that you can do is to raise tadpoles. This science experiments teaches children about life cycles and metamorphosis. To make it an experiment, feed your tadpoles different foods and see which ones grow faster or stronger. When they become frogs, you can see which set became bigger. This experiment is really easy and simple, but it's pretty interesting. Your daughter may not enjoy it too much, but chances are that your son really will!

Another of the great science experiments for kids is crystallization. Showing your child how to supersaturate a salt and water mixture, and creating crystals from this mixture can be a fun activity for a weekend. To make it more interesting, and something a child will enjoy, color the water with food coloring. Tell your child you'll be making blue crystals or pink crystals, or yellow crystals. When they do take up crystallization in school, they will look back at this experiment and realize they understand the concept already!

There are other science experiments for kids that you and your child can use as ways to spend time together. Creating a solar oven, extracting fruit DNA, or harnessing hydro-power are just a few ideas that can help make science both really interesting and fun for your child. The fact that they can do these experiments at home is a bug plus towards encouraging your children in scientific study!

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