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Physical Processes Name:____________________ Class:____________________ What is a magnet? Date:____________________ A long time ago, people discovered a special type of stone. When they hung these stones from a string, one end of the stone pointed north. These stones were called lodestones, or "leading stones". They could be used to lead people in the direction they wanted to go. The lodestones are a type of rock called magnetite. Magnetite is naturally magnetic. When a rock is magnetic, it is able to attract other objects that are made from iron or steel. Magnets are objects that attract iron or steel. There are many types of magnets. All magnets have a north pole and a south pole. The poles are where the force of the magnet is strongest. Opposite ends of a magnet attract each other. The north pole of one magnet attracts the south pole of another. The same ends each other. The north pole of one magnet repels the north pole of another. A magnet can attract objects without touching them. The space around a magnet where its force pulls is called its magnetic field. A magnetic field can attract an object through solids, liquids, and gases. Page |1 Pre – reading activity: Word search Find the below listed words in the following grid: Lodestone Repel Pole magnetic Attract naturally Label the poles clearly ATTRACT REPEL Page |2 During reading activity: 1- Fill in the blanks in order to have a complete meaning of the sentence. A _____________ is a rock that acts like a magnet. The opposite poles of a magnet __________ each other. Iron is one __________ of metal that is attracted to a magnet. Magnetite is a rock that is ______________ magnetic. Each end of a magnet is called a _____________. The south poles of two magnets will __________ each other. The space around a magnet where its force pulls is its ___________ field. 2- Choose the correct answer for the following questions: 1. When something is magnetic, it _______________ a. creates a strong electric shock. b. is able to attract iron or steel objects. c. is able to affect the weather. d. none of the above 2. All magnets have ___________________ a. north and south pole b. a magnetic field c. attracting and repelling ends d. all of the above Page |3 3. A type of naturally magnetic rock is ______________ a. magnetite b. granite c. iron d. all of the above 4. Lodestones were used to ____________________ a. measure weight b. locate sources of water c. guide people in the direction they wanted to go d. none of the above Page |4