Have students continue with their exploration of magnetic fields, using exploring magnetic fields. Students will explore magnets and magnetic fields through three activities. That is why a compass needs to have a lightweight magnet and a frictionless bearing. Most of you will say i knew this already which a lot of people. A collection of science experiments from steve spangler science your inbox is about to become a lot more exciting. Different types of magnets produce different arrangements of magnetic field lines. What is the major cause of the earths magnetic field. Elsasser, earths magnetic field is generated by a dynamo within the earths core matson 2002. This interactive animation lets you explore the magnetic field surrounding earth.
Earth s magnetic field differs from that of a bar magnet in that it is much less symmetrical, an effect due. The wall with the greatest net negative charge a middle school teacher. A teachers introduction to the earths magnetosphere. The scientific answer for the apparent decay of the magnetic field was given by dr. Magnetism and electromagnetism grades 812 magnetism and electromagnetism provides the basics of magnetism and electromagnetism through high schoollevel activities. The earths magnetic field should now swivel the needle on the cork. This dynamo is driven by an unknown energy source, but the subsequent fluid movement within the core generates the magnetic field around the earth matson 2002. He has been researching this area off and on since 1970. Eighth grade lesson in magnetic field earths magnetic. This field is what attracts items such as paper clips and nails to the magnet. Earth s magnetic field is also called the geomagnetic field.
Whats more, we found that the magnetic lines run from the south pole towards the north pole. Lab, interactive notebook, and video links sonja you can get this lab for free, for a limited time. Earths magnetic field acts like an invisible shield around earth that protects it. Three parameters are needed to describe the magnetic. Earth s magnetic field is powered by the heart of the planet. Earth s magnetic field, also known as the geomagnetic field, is the magnetic field that extends from the earth s interior out into space, where it meets the solar wind, a stream of charged particles emanating from the sun. In fact, without the strong magnetic field earth projects into space, life as we know it might not. Place bar magnet on the table in a ns orientation with respect to the image of the earth in the dish, that you place on top of the magnet. The seafloor is like a giant tape recorder with twin tapes recording the earth s magnetism at the time they emerge from the midocean ridges and then travel in opposite directions. Middle school magnetism lessonplans, homework, quizzes. Since then he has been collecting information, images, and articles to support the idea. Earth s magnetic field works a lot like a magnet does. It has been found that the earth steadily induces its own magnetic poles into a bar magnet kept in some. Students could complete the questions in lesson, from research on the internet or as a homework activity.
Like a bar magnet, planet earth has north and south magnetic poles and a magnetic field over which it exerts magnetic force. Have the students explore the metallic samples attracted. If the magnetic field is weak, and the plasma contains more energyperunitvolume than the field, then the plasma. Teaching about the earths magnetism in high school by david stern. Many animals have natural compasses that work just as well. Magnets also have a magnetic field every magnet has a magnetic field around it. The students will start the activity by placing the bar magnet on its side on their desk. As the plates on each side of ridges in the seafloor are pulled away, lava comes up from the middle, hardens and records the current magnetic field. Magnetic field of earth questions teaching resources.
It could disrupt it temporarily and cause problems but as the earth s magnetic field is thought to. The earth s magnetic field is slightly tilted, so compasses do not swing exactly toward the north pole, but to a point a little little way off from northern canada. Middle and high schoolers use the pythagorean theorem to complete a table showing with the magnetic field strengths in given cities. Walter elsasser, a physicist at the university of utah. This lesson goes over how earth behaves like a giant magnet and how the magnetic field protects us. Explore the interactions between a compass and bar magnet, and then add the earth and find the surprising answer. However, the cause of the field is due to the dynamo eff. Nova online teachers classroom activity magnetic storm.
The magnet can only stick to other metals it is attracted to. Its also called a magnetosphere, the most remote part of a planets atmosphere. Students will learn how the magnetic field is like a bar magnet inside earth. Use the field meter to measure how the magnetic field changes. We call those poles north and south because thats where theyre located on earth. A magnetosphere is the region around an astronomical object in which phenomena are.
In this lab, students demonstrate and explore various magnetic fields using iron filings, paper plates, and ceramic bar magnets. Many spacecraft have instruments called magnetometers that help scientists map out the shape of planetary magnetic fields. Magnetic fields are not limited to one direction or strength, in the student s experience. Describes that the magnetic field is like a bar magnet inside earth and the properties of the field to flip. A teachers guide to magnetism and solar activity stanford solar. Earths is committed to ensuring that all materials on this web site are accessible to students, staff, and the general public. Ws cns earth s magnetic field and facts they will find this fun but a little tricky. Its magnitude at the earth s surface ranges from 25 to 65 microtesla 0. Gently, they will shake iron shavings onto the paper. Youve probably played with magnets before these fascinating items can exert control over another object without even touching it. Earths magnetic fields power begins at earths core. Aug 25, 2000 the difference between a magnetic field and a gravitational field is that a gravitational field, in the experience of a student, always points downward and is always of the same strength 9.
The earths magnetic field extends into space and forms the magnetosphere. Sten odenwald image education and public outreach raytheon its and nasa goddard sfc image education and public outreach raytheon its and nasa goddard sfc cover artwork. If the magnetic field is strong, it forms a rigid framework that can trap the plasma, which is what you get in the radiation belts. Earth s magnetic field interactive this interactive animation lets you explore the magnetic field surrounding earth. Because the core of our planet is filled with molten iron fe, there is a large field that protects the earth from space radiation and particles such as the solar wind. A compass pointer is aligned by earths magnetism to point north. Stem activities for middle and high school students magnets1. An image satellite guide to exploring the earths magnetic field 9 3urfhgxuh give each student a magnet. The magnetic field of the earth is fairly weak on the surface.
Its interesting to note that the strength of earth s magnetic field is very weakabout 100 times weaker than that of a typical bar or fridge magnet. One important similarity does exist between the magnetic field of the earth and the gravitational field of the earth. Just click like on science interactions on facebook and private message your email address to me. Earths magnetic field is approximately a magnetic dipole, with the magnetic field s pole near the earths geographic north pole and the other magnetic field n pole near the earths geographic south pole. Students visualize the magnetic field of a strong permanent magnet using a compass. Exploring magnetism on earth primarily features mathbased activities about earth s magnetic field and its changes over long timescales. Elsasser, earth s magnetic field is generated by a dynamo within the earth s core matson 2002. Understanding that the earth has magnetic field and that it is similar to that of a bar magnet. Earths magnetic field goes way out into space, in a region called the magnetosphere, and can. Introduction earth s magnetic field, also known as the geomagnetic field, is the magnetic field that extends from the earth s interior to where it meets the solar wind, a stream of charged particles emanating from the sun.
The earth s magnetic field should now swivel the needle on the cork. Another benefit of earths magnetic field is its use for navigation. What is the evidence that a magnetic field exists answers. Magnetic fields answer the following questions based on magnetic fields. Earths magnetic field is what causes the needle of a compass to point north and south. Covers a large range of science topics, including magnets and magnetic fields. The earths magnetic field in this room right now points toward which wall f this room a. Grade 5 standard 3 unit test a magnetism multiple choice c.
The earth s interior is composed of four layers, three solid and one liquidnot magma but molten metal, nearly as hot as the surface of the sun. Further, all students will know, by the midpoint of this unit, that magnetic fields are inherently loop shaped. Predict the approximate size of earths magnetic field and the approximate location of its north and south poles. The diagram below shows an example of magnetic field lines, the earths magnetic field, as the earth acts as a giant bar magnet. Based on what you learned about magnetic force, make three predictions. Dennis brooks is an independent researcher who studies earth s magnetic field with a passion. Its magnitude at the earth s surface ranges from 25 to 65 microteslas 0. The earth s magnetic field reaches out into space and meets the earths magnetic field since it is the closest, strongest field, and thus the compass responds to the field of the permanent magnets, allowing them the ability to map the field of that magnet in the activity. Students see the connection that the compass simply responds to the earths magnetic field since it is the closest, strongest field, and thus the compass responds to the field of the permanent magnets, allowing them the ability to map the field of that magnet in the activity. Earths magnetic shield video nova labs khan academy. In this lesson plan, which is adaptable for grades 38, students use brainpop resources to define, describe, and draw magnetic field lines around a single magnet. Teaching resources geomagnetism, paleomagnetism, and.
When a compass or any freely floating bar magnet points north, it is actually aligning its north pole to the earths magnetic south pole. They find the average value of the earth s magnetic field and plot one of the threedimensional values. One end of the needle will always point to the north. Many lab activities can be conducted with our wireless, pasport, or even scienceworkshop sensors and equipment. The swirling patterns of light follow lines of magnetic force in the magnetosphere. As discussed in the lesson closure, understanding the earth s magnetic field is important in designing ways of protecting astronauts in space. The magnetic field near the earth is from a combination of three sources.
Although the magnetic field is invisible, the iron filings indicate where it is because they line up with the field. Read science articles on air quality, geology, meteorology, oceanography, paleontology and science and the environment. Magnets do more than pick up metal objects and attract iron filings. Displaying all worksheets related to magnetic forces. Similar magnetic poles repel, while opposite magnetic poles attract. You can use the compass you make here to plot a magnetic field like the earth s. Verify activity by showing the lines on the phet simulation for last lesson. Earth s magnetic field, also known as the geomagnetic field, is the magnetic field that extends from the earth s interior out into space, where it interacts with the solar wind, a stream of charged particles emanating from the sun. However, if the magnetic field is weak, the magnetic field of the earth will be stronger, and the magnetic needle will. The goal is to use as few shavings as possible to depict the magnetic field lines of their magnet.
The magnets north pole points north from most locations on earth. Worksheets are physics magnetic force work, magnetic field force work physics 104, lab 7 e 4 magnetic fields and forces lab work name, chapter 28 work 1 magnetic fields force, magnets are fun, what is magnetism, lab 7 magnetic fields and forces lab work name, grade 5 standard 3 unit test a magnetism multiple choice c. Then, they will cover the magnet with the piece of paper. The earths centre has a dense fluid outer core and a solid inner core, both of which are high in ironrich materials. Vary the magnet s strength, and see how things change both inside and outside.
Solid crust semisolid mantle liquid iron outer core solid iron inner core. It can be thought of as a line of force running from the north end of the magnet to the south end of a magnet. Activity 6 exploring the earths magnetic field see appendix g. Worksheets are magnetic field force work physics 104, magnetic elds and forces, table of contents, physics magnetic force work, what is magnetism, chapter 28 work 1 magnetic fields force, activity 4 magnetic. The lesson begins with an analogy to the effect of the earths magnetic field on a compass.
English scientists michael faraday and james clerk maxwell discovered the concepts of magnetic field and magnetic lines. Sitting atop the hot inner core, the liquid outer core seethes and roils like water in a pan on a hot stove. Each dish has a circular pieces of paper with a photocopy of the earth in the middle. Drag the compass through the space around earth to explore the shape of earth s magnetic field. Trapping of particles in the earth s field this attachment can work in two main ways. Ever wonder how a compass worked to point you to the arctic. Well, one, ill explain how we think about a magnetic field.
Wireless magnetic field sensor this 3axis magnetic field sensor can sense the earths magnetic field and fields from coils and bar magnets. Nova online teachers classroom activity magnetic storm pbs. Michelle taught elementary school for five years, then taught in the education. Hidden portals in earth s magnetic field is an extension video about.
What is the evidence that a magnetic fi eld exists. And then what the effect of a magnetic field is on an electron. The european space agency s video, measuring earth s vital magnetic field, provides a short introduction to the earth s magnetic field and its health. The problem with that picture is that the curie temperature of iron is about 770 c. Students first learn how to use a magnetic compass to navigate and then has students answer questions using data about earth s magnetic field either as graphs or numbers. This lesson is designed for late elementary through middle school. The earth s core is hotter than that and therefore not magnetic. Students will also describe the interaction between like and unlike magnetic poles, and draw the combined fields created when like and unlike magnetic poles interact. They find the average value of the earths magnetic field and plot one of the threedimensional values. The effect of earths magnetism extends nearly 60,000km out into space. Earth s magnetic field lesson plan template and teaching resources.
Learners will construct a soda bottle magnetometer, collect data, and analyze the results to detect magnetic storm events. On earth, gravity, not magnetism, is the force that sticks you to the floor. Cherry hill middle school elkton, maryland chaffey high school ontario, california briggschaney middle school. Bbc earth earths magnetic field now flips more often. Although the deepest well ever drilled, the kola well in russia, only penetrated 0. Earth and space science, earth structure, earth s magnetic field. So if the earth was a big magnet, you would actually view that as a south pole of the magnet.
Aug 05, 2016 earth s magnetic field lesson plan template and teaching resources. The outer core also has hurricaneswhirlpools powered by the coriolis forces of earth s rotation. It can be made of many different types of metals, including iron and nickel. Aurora borealis the northern lights are charged particles from the sun attracted by the earths magnetic poles. Earths magnetic field acts like an invisible shield around earth that protects it from dangerous things, like radiation from the sun. Question sheet all about the magnetic field of the earth, including the iron core, way the magnetic field is needed and how it protects the earth, also includes a model answer sheet for marking work or using as the answers. People use compasses to detect earths magnetic north pole and tell direction.
Magnetic field of the earth georgia state university. Earths magnetic field interactive windows to the universe. The earth behaves as if it has a large permanent magnet at its centre. The scientific study of earths magnetic field is a complex subject that has evolved. Eighth grade lesson in magnetic field earths magnetic field. Early in the investigation, he found that earth s magnetic field might be part of a larger dynamo system. The earth s magnetism comes from its inner core of iron and nickel. Apr 14, 2020 this is an activity about changes in the earth s magnetic field during magnetic storms. Grade 5 standard 3 unit test a magnetism multiple choice 1. Displaying all worksheets related to magnetic field.
Earth s magnetic field comes from this ocean of iron, which is an electrically conducting fluid in constant motion. Cns activity requires a little time and they need to do this properly. Posting discussion questions before showing the video is suggested. Earth and space science, earth structure, earth s magnetic field, earth and space science, solar system, the sun, magnetosphere, earth and space science, solar system, the sun, solarterrestrial interactions. Earth s magnetic field, also known as the geomagnetic field, is the magnetic field that extends from the earth s interior to where it meets the solar wind, a stream of charged particles emanating from the sun. This lesson covers magnetic fields and also serves as an introduction to vector fields, which are a common theme through most electrical engineering disciplines. Earth s magnetic field is most similar to the magnetic field generated by a bar magnet. Aug 18, 2012 discovery channel hd presents a nice detailed explanation about the sun and how it has a direct effect on earth s magnetic field. The earths magnetic field behaves as if a vertical column between the poles was hollowed out and a standard bar magnet was planted in the cavity. An image satellite guide to exploring the earths magnetic field 2 dr. After all, the planet earth is almost 8,000 miles in diameter, so the magnetic field has to travel a long way to affect your compass.
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