Click on the blanks and choose the best alternative Internet Safety Twenty _________hoursdaysweeksyears ago, kids in school had never even heard of the internet. Now, I'll bet you can't find a single person in your school who hasn't at least heard of it. In fact, many of us use it on a regular basis and even have access to it from our homes! The 'net' in _________internetfishnetnetworknetting really stands for network. A _________computerinternetnetworkwire is two or more computers connected together so that information can be _________hiddenlostcreatedshared, or sent from one computer to another. The internet is a vast resource for all types of information. You may enjoy using it to do research for a school project, downloading your favorite songs or communicating with friends and family. Information is accessed through web pages that companies, organizations and individuals create and post. It's kind of like a giant bulletin board that the whole world uses! But since anyone can put anything on the internet, you also have to be careful and use your best judgement and a little common sense. Just because you read something on a piece of paper someone sticks on a bulletin board doesn't mean it's good information, or even correct, for that matter. So you have to be sure that whoever posted the _________internetbulletin boardinformationstamp knows what they're talking about, especially if you're doing _________researchlunchrecesssports! But what if you're just emailing people? You still have to be very careful. If you've never met the person that you're communicating with online, you could be on dangerous ground! You should never give out any personal information to someone you don't know, not even your name! And just like you can't _________readfindunderstandbelieve the information on every website out there, you can't rely on what strangers you 'meet' on the internet tell you either. Just like you could make up things about yourself to tell someone, someone else could do the same to you! key HERE: http://readcomp.blogspot.com/2005/06/internet-safety.html
Internet Safety
Just because you read something on a piece of paper someone sticks on a bulletin board doesn't mean it's good information, or even correct, for that matter. So you have to be sure that whoever posted the _________internetbulletin boardinformationstamp knows what they're talking about, especially if you're doing _________researchlunchrecesssports! But what if you're just emailing people? You still have to be very careful. If you've never met the person that you're communicating with online, you could be on dangerous ground! You should never give out any personal information to someone you don't know, not even your name! And just like you can't _________readfindunderstandbelieve the information on every website out there, you can't rely on what strangers you 'meet' on the internet tell you either. Just like you could make up things about yourself to tell someone, someone else could do the same to you!
key HERE: http://readcomp.blogspot.com/2005/06/internet-safety.html
Magnets and Electromagnets Magnets are materials that attract pieces of iron or steel. In ancient times, people first discovered magnetism when they found some naturally _________heavymagneticroughrocky pieces of rock in the earth. They called these rocks lodestone. Loadstones have a lot of iron in them, but we now know that other materials can be magnetized as well. Nickel, cobalt, certain types of ceramics and certain blends of metals can also make good magnets. If you could look at a magnet at the atomic level, you would notice that the magnet was divided into a number of smaller regions called domains. All of the _________atomsmagnetsfingersarrows in a domain point in the same direction and, since each atom acts like a little _________atomelectronprotonmagnet, all of their little magnetic fields add together to make a larger, _________weakerelectricgreenstronger field. A magnet can be weakened if some of its atoms are thrown out of alignment. Hitting or heating a magnet is usually enough to scramble some of its atoms. Magnets have north and south poles. The north pole of one magnet will repel, or push away, the north pole of another magnet, and the south pole of one magnet will repel the south pole of another magnet. But, if you put the north pole of one magnet near the south pole of another magnet, you'll feel an attractive force. You may have heard the saying "opposites _________repelattractsingoppose." This is just one of the rules of nature that scientists have discovered. Everyone knows that magnets stick to refrigerators, but did you know that magnets are used in all sorts of things? Most of the magnets we are used to seeing are made from metals rich in _________carbonaluminumironoxygen. The kind we use to hold our school work to the refrigerator are called permanent magnets. They are magnets today and they'll be magnets tomorrow. They just hang there and continue to be magnets without us doing anything to them. Can you think of anywhere else you might find permanent magnets in your house? Did you know there's a magnet in the seal on the inside of your refrigerator door? You don't use that one to hold your school work, but it does hold the door closed when you're not looking for a snack or a cold drink. Some cabinet doors have magnetic latches too. Can you think of any other places where magnets have practical uses? Permanent magnets are one kind of magnet, but there's another kind of magnet called an electromagnet. _________electromagnetsmagnetsElectromagnetsdomains are made from metal and electricity! When the _________lighttelevisionradioelectricity is on, you have a magnet, but turn the power off, and you just have a hunk of metal and some wire. Unlike permanent magnets, the strength of an electromagnet is easy to change. One way to do this is to change the amount of current used. Another way is to change the amount of wire you have wrapped around the metal core. You see, when you wind wire in coils around a piece of metal that has a lot of iron in it, and then you run electricity through the wire, it creates a magnetic field. More coils of wire or more electric current creates a stronger magnetic field. This magnetic field causes the atoms in the core to align, giving the metal _________magneticmagicalphysicalchemical properties. Electromagnets are used in many devices. Think of things that use power and have moving parts. Chances are, an electromagnet is causing the motion! Power windows in a car, automatic doors at the grocery store, and the little motor in a CD player that makes the CD spin so you can listen to your favorite music all contain electromagnets! Electromagnets really make our lives _________easierlongmiserablehard, and more fun, too!
Magnets and Electromagnets
key HERE: http://readcomp.blogspot.com/2005/06/magnets-and-electromagnets.html
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