Results

The force that acts across the air gaps between magnets is the same force that creates wonders such as the Aurora Borealis. In fact, magnetic effects pervade our lives in myriad ways, from electric motors to medical imaging and computer memory. In this chapter, we introduce magnets and learn how they work and how magnetic fields and electric currents interact.

In this lesson you will learn about:

• The concept of magnetism
• Be able to identify magnetic and non-magnetic materials
• Identify properties and types of magnets
• Understand that metals can be magnetised and de-magnetised
• Understand that magnets have a magnetic field
• Understand that the Earth has a magnetic field

Introduction to magnetism: Wikipedia article that provides an overview of the concept.

Forces at a distance are explained by fields (gravitational, electric, and magnetic) permeating space that can transfer energy through space. Magnets or electric currents cause magnetic fields; electric charges or changing magnetic fields cause electric fields.

Magnetism is an interaction that allows certain kinds of objects, which are called ‘magnetic’ objects, to exert forces on each other without physically touching. A magnetic object is surrounded by a magnetic ‘field’ that gets weaker as one moves further away from the object. A second object can feel a magnetic force from the first object because it feels the magnetic field of the first object. The further away the objects are the weaker the magnetic force will be.

According to Creative Commons there are over 1.6 billion openly licensed teaching and learning resources available on the internet. Open Educational Resources (OER) are quality, free educational resources, that you can use without having to ask for permission, and that can be adapted to better suit local contexts and needs.

Many educators and developers don't know how to efficiently search for and identity useful resources. Some throw up their hands in horror and give up when tasked with finding suitable resources on the Internet. In this tutorial, we are committed to providing you with a search strategy for open content to ensure that you quickly find open resources. Let us begin!

On completion of this unit of study you will be able to:

• Decipher open licenses i.e. identify rights and permissions contained within Creative Commons licences attached to open content.
• Search for open content using common tools and filters such as on Google Advanced Search and the YouTube Creative Commons filter, as well as specialized services such as Creative Commons Search to find open media.

Volgens Creative Commons zijn er meer dan 1,6 miljard open gelicentieerde onderwijs- en leermaterialen beschikbaar op het internet. Open Educational Resources (OER) zijn gratis onderwijsmaterialen van hoge kwaliteit die je kunt gebruiken zonder toestemming te hoeven vragen, en die kunnen worden aangepast om beter aan te sluiten bij lokale contexten en behoeften. 

Veel leerkrachten en ontwikkelaars weten niet hoe ze efficiënt bruikbare bronnen kunnen zoeken en identificeren. Sommigen gooien vol afschuw hun handen omhoog en geven het op wanneer ze geschikte bronnen op het internet moeten vinden. In deze handleiding willen we je een zoekstrategie geven voor open inhoud, zodat je snel open bronnen kunt vinden. Laten we beginnen!

Na afronding van deze studie-eenheid bent u in staat om

• Open licenties te ontcijferen, d.w.z. de rechten en toestemmingen te identificeren die zijn opgenomen in Creative Commons-licenties die aan open content zijn verbonden.
• Zoeken naar open materiaal met behulp van veelgebruikte tools en filters zoals Google Advanced Search en het Creative Commons-filter van YouTube, maar ook met gespecialiseerde diensten zoals Creative Commons Search om open media te vinden.