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to ward off or force back. This spray repels insects. These magnets are repelling each other. antonyms: allure, attract, lure. similar words: dispel, disperse, expel, oust, resist, rout. definition 2: to keep out; resist.
- What Do We Use Magnets for?
- Which Materials Are Magnetic?
- How Different Materials React to Magnetism
- What Causes Magnetism?
- A Brief History of Magnetism
Maybe you think magnets are interesting; maybe you think they'reboring! Whatuse are they, you might ask, apart from in childish magic tricks andscrapyards? You might be surprised just how many things around youwork by magnetism or electromagnetism. Every electric appliance withan electric motor in it (everythingfrom your electric toothbrushtoyour l...
Iron is the king of magnetic materials—the metal we all think ofwhen we think of magnets. Most other common metals (such as copper,gold, silver, and aluminum) are, at first sight,nonmagnetic and most nonmetals(including paper,wood, plastic, concrete, glass,and textiles suchas cotton and wool) are nonmagnetic too. But iron's not the onlymagnetic met...
Scientists have a number of different words to describe howmaterials behavewhen you put them near a magnet (which is another way of saying whenyou put them inside a magnetic field). Broadly speaking, we candivide all materials into two kinds called paramagnetic anddiamagnetic, while some of the paramagnetic materials are alsoferromagnetic. It's imp...
In the early 20th century, before scientists properly understood thestructure of atoms and howthey work, they came up with an easy-to-understand idea called thedomain theoryto explain magnetism. A fewyears later,when they understood atoms better, they found the domain theory stillworked but could itself be explained, at a deeper level, by thetheory...
Ancient world: Magnetism is known to the ancient Greeks, Romans,and Chinese. The Chinese use geomantic compasses (ones with woodeninscriptions arranged in rings around a central magnetic needle) in...13th century: Magnetic compasses are first used for navigationin western nations. Frenchman Petrus Perigrinus(also called Peterof Maricourt) makes the first proper studies of magnetism.17th century: English physician and scientist WilliamGilbert(1544–1603) publishes On Magnets, hismonumental scientific study ofmagnetism, andproposes that Earth is a giant magnet.18th century: Englishman John Michell(1724–93) andFrenchman CharlesAugustin de Coulomb(1736–1806) study the forcesmagnets can exert. Coulomb also makes important studies of electricity,but fails to...Nov 11, 2018 · Unlike-poles attract: When a north pole and south pole point together, the arrows point in the SAME direction so the field lines can join up and the magnets pull together (attract). Image...
Mar 31, 2023 · Attract DEFINE. When magnets with different charges come together we say they "attract" or come together. Repel DEFINE. When magnets with the same charges come together we say they "repel" or push each other apart. Magnet DEFINE. An object that produces a magnetic field. Magnetic Field DEFINE
- Can one object apply a force to another without touching it?Yes. Non-contact forces include magnetic, electric (electromagnetic and static) and gravitational forces.
- Do magnets have to touch each other to work?No. Magnetic fields extend beyond the magnet causing forces to be applied at a distance.
- What types of materials do magnets attract?Magnets are attracted to certain types of metal like iron, nickel and cobalt.
- What evidence do we have that magnets exert a force?The attraction of metal to magnets (such as a paper clip sticking to a magnet) is evidence that magnets exert a force. Iron filings or ferrofluid c...
- If magnetic fields are invisible, how do we know they are there?We know they are there because magnets push and pull magnetic materials. We can also visualize magnetic fields using certain materials such iron fi...
- Is an aluminum can magnetic or non-magnetic? Why or why not?An aluminum can is not attracted to a magnet. We see this during the “magno-board” investigation. Only certain kinds of metal like iron, nickel and...
- Why do the neodymium magnets come together and pulverize the fruit?The neodymium magnets are set up with opposite poles facing each other so that they are attracted to each other. These types of magnets are VERY st...
- How are magnetic force and distance from an object related?The closer a magnet is to an object, the stronger the force.
- How can a nail become an electromagnet and magnetically attract paper clips?An iron nail wrapped in wire is not magnetic, but when electricity from a battery flows round and round through the coil of wire it creates a magne...
- Do the balloon and plastic bag used in the levitation device have the same or opposite charges?The balloon and plastic bag have the same charges. Evidence: they repel each other.
Will two magnets attract or repel? Well, that depends on the poles of the magnets. If you put two north poles or two south poles together, they will repel. If you put two opposite poles together, they will attract. This worksheet on magnets tests children with a number of different scenarios.
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- Why is this activity useful when teaching children about magnets?This worksheet is a fantastic activity to introduce this topic to your students. Children are given some key information about magnets that is easy...
- Ideas for teaching children about magnetic polesYou can develop your children's understanding of whether magnetic poles attract or repel with these proactive lesson ideas: Demonstrate magnetism w...
What’s the Attraction? Children of all ages have a natural “attraction” to magnets. Even young students can learn facts about magnets and related vocabulary. When demonstrating magnets use words like attract and repel and then allow time for exploration with individual magnets.
Predict the motion of magnets, based on knowledge that they repel and attract. Prior Knowledge: No extended prior knowledge is needed for this lesson. Though some students may be more familiar with magnetism than others all students will get an equal chance to explore and experiment with magnets in this lesson. What You Need: Magnetic marbles.
