Lesson IV: Magnetic Compass

Slides:

Advertisements

Similar presentations

 Q: Electric current is measured in?  A: Amps  Q: Electrical energy is measured in what?  A: Volts.

Advertisements

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Magnetism Table of Contents Section 1 Magnets and Magnetic Fields.

Magnets. Two Poles What is a magnet? A magnet is an object that attracts certain materials usually objects made of iron or steel.

Magnetic Field Area around a magnet where the magnetic “force” could affect other objects. [ neticField/gifs/B-FieldMagnet.jpg]

Compasses D. Crowley, 2008.

The Compass. Some History As far back as 2500 BCE the Chinese knew that a loadstone on a piece of floating wood, would always point itself in the same.

Magnetism Mr. Dunnum Physical Science. History of Magnets First compass n Thousands of years ago, people noticed that a mineral called magnetite attracted.

Electromagnetism. Magnets Magnets are materials that produce a magnetic field. Magnets can only exert a force on some metals ( iron, cobalt and nickel)

Cartoon. CLIPPER SHIP How would you find your way if you were lost 1000 miles from land?

Magnets and Magnetism Chapter 6 Section 1. Vocab Magnet- any material that attracts iron or materials containing iron. Magnetic Pole- one of two points,

Magnets 1 Two poles of the opposite kind attract each other. Two poles of the same kind repel each other.

Play with your magnets!.

The Earth’s Magnetic Field. North and South The north pole of the magnet … …points to the north pole of the Earth S When you hang a bar magnet from a.

Earth’s Magnetic Field

Magnet Notes Must contain nickel, cobalt or iron

Magnetism property of matter in which there is a force of attraction or repulsion b/w like or unlike poles.

MAGNETS Taylor Wakeland, Hannah Fisher, Dawn Chambers & Rachael Kugler.

 a field is a region of space surrounding an object that can cause another object to experience a force  ex: gravitational field, electric field  a.

Navigation NAU 102 Lesson 14. Magnetism & Compasses A basic function of navigation is finding direction. We must determine: Courses Headings Bearings.

MAGNETISM Section 8.1. Magnetism  Magnetism- the properties and interactions of magnets  Interaction between two magnets, called magnetic force, increases.

Magnets received their name from “Magnesia” which is a part of present day Greece. Ancient people discovered that certain stones such as magnetite always.

What is Magnetism? The compass was an important development for navigation and exploration, especially at sea. Early Uses.

Protons Neutrons Electrons Review: An atom is made up of protons (+ charge) and neutrons ( 0 charge) in a core nucleus and electrons (- charge) in orbit.

Chapter 8, Section 1 Notes MAGNETISM AND ITS USES Magnetism.

Lesson 2 – Magnetic Fields

Magnets and Magnetism Magnet – any material that attracts iron or things made of iron.

Free Science Videos for Kids

EMM Lesson 5 MAGNETIC FORCES.

You have 2 minutes to play with your magnets.

Using a Compass What is a compass? How does a compass work?

Magnetism Lesson. Magnetism Lesson What is Magnetism? Any material that attracts ferromagnetic materials including iron, steel, cobalt and nickel Can.

CH 5 – Electricity and Magnetism

Making a Compass Mr. Ahearn 2010.

Lesson III: Three Norths & Variation

Magnetism Chapter 49.

Magnets, Magnetism & Electromagnetism

Magnets and Magnetic Fields

About All You Need to Know

-FORCE & MOTION.

Section 2-1 Magnetism and Magnetic Fields Notes

Chapter 8 Magnetism & Its Uses.

Chapter 18.1 – Magnets and Magnetic Fields

L 28 Electricity and Magnetism [5]

DSQ: Which magnets in the picture are attracting, and which are repelling?

WALT: about compasses.

Magnets and Magnetic Fields

Electricity and magnetism

Chapter 17: Magnetism and Its Uses

Learn All about magnets

Magnetism and Electricity

Magnetic Substances & Magnetic Fields

Magnets & How Compasses Work.

L 28 Electricity and Magnetism [5]

Electromagnetism.

Notes 8-1: Magnetism.

Magnetism and Its Uses 7.1 Magnetism.

Magnets attract.

Electric force: push or pull between 2 charged particles

Magnetism – Learning Outcomes

Electromagnetism 1 (Chapter 14)

Magnetism – Learning Outcomes

Aim: How do explain magnetic fields?

In this section, you will learn:

Presentation transcript:

Lesson IV: Magnetic Compass Nautical Navigation Lesson IV: Magnetic Compass Preserving America’s Sailing Legacy * Engaging Sailing’s Next Generation

History of Magnetic Compass No one knows for certain when or where the compass was first invented. But, there is record of use by the ancient explorers and land conquerors over 1000 years ago First compass was iron ore “loadstone” floating in a bowl of water Allowed sailors to sail over the horizon without risk of being lost at sea Before the compass, navigators had to stay along the coastline

Direction of Travel Arrow Parts of a Compass Direction of Travel Arrow Magnetic Needle Orienting Arrow (“doghouse”) Rotating Bezel

How a Magnetic Compass Works Consists of a lightweight magnet, or needle, balanced on a nearly frictionless pivot point The needle always points to the magnetic north pole

How a Magnetic Compass Works Earth’s magnetic field is a closed circulation of electrical currents that flow North or South

How a Magnetic Compass Works Magnetized needle is free to move and align with the Earth’s magnetic field Basic Law of Magnetism Opposite Polarities Attract Same Polarities Repel So why does the North end of the needle point to the magnetic north pole? Think of the earth as having an internal bar magnet extending along its axis from Magnetic Pole to Pole

What are Some Benefits to a Magnetic Compass? Self-contained system not reliant on electrical power Inexpensive and easy to replace How would you make your own magnetic compass?

Exercise Each person will have their own magnetic compass Orienteering Compass “Hockey Puck” Compass Using the worksheet, write down the bearings of the objects to the nearest degree