The reason that some things stick to the front of your refrigerator or the back of 0 CC" but others don't has to do with magnetism! A magnet is an object that has an invisible force that pulls in or pushes away other magnetic material called a magnetic force surrounding It. When this happens, energy is transferred from one magnet to the other. The magnetic force of the object that is sticking to the front of a fridge or the back of a car is pulling that ObJeCt close to the magnetic force of the car or fridge. Unfortunately, magnetism isn't as simple as just pushing out or pulling away. Magnets are like people ' each one has its own characteristics! Different magnets are attracted to different things, repel from different things! and have varying levels of strength. Despite their differences, all magnets share one thing in common - they all have two poles. Poles are the ends or the top and bottom of a magnet or an electromagnet where the magnetic pull of the magnet is the strongest. Every magnet, including electromagnets, has two poles: a North Pole and a South Pole. The North and South Pole on a bar or a horseshoe magnet is on each end of the magnet. while the poles on a donut magnet are located on the top and bottom of the magnet. Certain poles do not like to be near each other. For example, if the South Pole of one magnet comes close to the South Pole of another magnet, the two magnets will push away. or repel, from each other. North Poles work the some way - they don't like to be near each other and will cause the magnets to repel if they get too close. Like poles repel like poles. When you think about two like poles being near each other, think about having two bosses in a partner set - it doesn't work out very well! Some poles do like to be near each other. though. If the South Pole of one magnet comes near the North Pole of another magnet. the two opposite poles will attract, or pull inwards toward each other. Opposite poles attract because the magnetic field likes to flow in one direction, from the North Pole to the South Pole. 80, when the North Pole of one magnet is next to the South Pole of another magnet, the magnetic field is able to flow in the correct direction very easily. In addition to being attracted to other magnets, magnets also attract certain types of metals. An example of a metal material that is attracted to magnets is a paper clip. Put a paper clip near a magnet and you will see that the paper clip is attracted to the magnet. However, if you try to use one paper clip to attract another paper clip, it won't work because paper clips are not magnets themselves, but they are magnetic. There is a big difference between the two! Magnets have their own magnetic eld, whereas objects that are magnetic do not have a magnetic field of their own, but they are attracted to other magnetic fields. The outside of a car or the door of a refrigerator are examples of magnetic objects because they are attracted to magnetic fields, but they are not magnets themselves. Iron, nickel, and steel are three common metals that are magnetic. Put any of these metals near a magnet and you will see that they are attracted to the magnet, but they cannot do any attracting themselves. _ ....................................................................... ------------------------------------------------------------------------- www leachinglslhcsweetastcom @leaching is the Sweetosl Thing 36 ,, a. .. -v.-......n..~ luuwl run; nu. dlquluJI \"in.\" -yl ELECTRICITY & MAGNETISM Magnets Magnets vary in strength, but don't be fooled by the size of a magnet because big magnets do not necessarily mean stronger magnets. The strength of a magnet is determin by the amount of force it uses to attract or repel objects around it. Remember that strength of a magnet is greatest at the poles. One way to test the strength of a magnet o compare the strengths of two or more magnets is to see how many paper clips it can pick u In the same way that people are both alike and different depending on how you compo them, magnets are both similar and different from each other. All magnets have an invisib magnetic field that attracts and repels other magnets and magnetic objects, and magnets also have two poles: a North Pole and a South Pole. Like poles (North and North South and South) repel, or push away from each other, while opposite poles (North and South) attract. Magnets are attracted to more than just other magnets. Many metals are not magnets, but they are magnetic, which means they are attracted to other magnets but they don't attract anything themselves. Further, like people, magnets vary in strength. See if you can find any magnets near you that will attract paper clips, and explore for yourself to see how many paper clips your magnet can pick up.Name TEXT-BASED EVIDENCE QUESTIONS Magnets Directions: Answer these questions after you read the passage. Remember to begin your answer by restating part of the question, use direct evidence from the text, and explain your thinking. KEY IDEAS & DETAILS 1. According to the first paragraph of the text, what makes something magnetic? RI. 1 If an abject is mannetie, it possesses " an invisible force that pulls in or pushes away 2. Explain what the pole of a magnet is. RI.3 3. Explain what makes a magnet repel or attract. RI.3 4. Explain the difference between being magnetic and being a magnet. RI.3 5. List a few examples of things that are not magnets but are magnetic. RI.2Name TEXT-BASED EVIDENCE QUESTIONS Magnets Directions: Answer these questions after you read the passage. Remember to begin your answer by restating part of the question, use direct evidence from the text, and explain your thinking. CRAFT & STRUCTURE 6. Explain the meaning of the word "poles." RI.4 7. How is the passage organized? (Chronological, cause/effect, comparison/contrast, description, problem/solution). Use evidence from the text to explain your answer. RI.5 INTEGRATION OF KNOWLEDGE & IDEAS 8. What is the key idea that the author wants readers to understand from this text? Use evidence from the text to support your reasoning. RI.8