Science Checkpoint 8 I Chapter 9: Magnetism

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Chapter 9: Magnetism

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Tharwat A

Palestine

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Science Checkpoint 8 I Chapter 9: Magnetism


Compléter Science Checkpoint 8 I Chapter 9: MagnetismVersion en ligne Chapter 9: Magnetism par Tharwat A 1 area poles strongest attract field poles magnetic A magnet is something that will magnetic materials . It consists of two , N and S , which is North and South respectively . The magnet has a that will attract the paperclips when it reaches the . The magnetic field is at the . 2 detected moves objects compass magnetic A magnetic field can be by either observing whether a because of the attraction OR use a . 3 turn direction magnetised A compass contains a needle that is free to . The needle will turn and point in the of a magnetic field . 4 spins natural axis geographic imaginary magnetic The north and south poles are the parts of the Earth through which the spin passes . The axis is the line around which the Earth . The earth ? s field causes the appearance of lights visible in the night sky close to the north and south poles . These are caused by particles coming from the sun arriving into the stronger parts of the earth ? s magnetic fields . 5 away move repel When a south and a north are pointing each other , there will be a force of attraction between the magnets . When like poles are together the magnetic fields will or try to from each other . 6 lodestone north needle A rock called contained magnetite was found 4000 years ago . The small of the lodestone will always point to the when floating on water . 7 electricity iron magnetise permanent magnetised Steel turned magnet electromagnet Properties of magnetic materials . - Magnetic materials include the metals , nickel and cobalt . is another common magnetic metal . - They can be , that means be into a . - The magnets we are using are called magnets because they have a magnetic field that is always there . - one way to a magnetic material is by using . When this method is used , the magnet is called an . 8 magnetic opposite compass bar cell magnet two reverse two Poles of an electromagnet - An electromagnet has poles , similar to a bar magnet . T find out which pole is which in simple ways . Use a . A magnetic compass points along the magnetic field lines , so will point towards the south pole . OR Use a with known poles , opposite poles will attract and like poles will repel . WHEN making electromagnets . WE can the poles of an electromagnet in one of two ways . - Wrap the coil around in the direction - Reverse the connection on the . 9 factors greater current core coil stronger Strength of electromagnets The that affect the strength of an electromagnets are the components that made up of an ELECTROMAGNET - A of wire ( the more turns , the stronger ) - a magnetic inside the coil and ( Materials of the core . Iron and some types of steel make the strongest electromagnets ) - an electric flowing in the coil ( The the current , the the electromagnet ) 10 bell make down toaster pushed handle MRI the electric move hammer produce images Applications of electromagnets - Some types of scanner in hospitals use powerful electromagnets . AN scanner is used to from inside the human body . - In a , when the is , an electromagnet holds down a metal basket with bread in it , A timer turns the electromagnet off and the metal basket pops up with toast . - An uses an electromagnet to . When the electromagnet is on , the hammer is pulled onto the bell . The movement breaks the circuit and the hammer moves away from the bell . The circuit becomes complete again and the hammer is pulled back to the bell . This continues until the power supply is turned off .

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Science Checkpoint 8 I Chapter 9: Magnetism

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Créé par

Téléchargez la version pour jouer sur papier

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Science Checkpoint 8 I Chapter 9: MagnetismVersion en ligne

par Tharwat A

area poles strongest attract field poles magnetic

detected moves objects compass magnetic

turn direction magnetised

spins natural axis geographic imaginary magnetic

away move repel

lodestone north needle

electricity iron magnetise permanent magnetised Steel turned magnet electromagnet

magnetic opposite compass bar cell magnet two reverse two

factors greater current core coil stronger

bell make down toaster pushed handle MRI the electric move hammer produce images