Welcome to Igluvigaq...Tungasugit Igluvigarmut

 

Picture
 

 

Picture
 

Picture
Picture
What Is Electricity?
  Electricity is a big part of our lives. It powers our lights. It can heat and cool our homes. It can make our televisions and computers work. It can even power our cars! We all use electricity every day, but what is it?
 
    First, you have to know about atoms. All matter is made of atoms. Atoms are very small. They are so small that you cannot see them without a special microscope. Atoms are made up of protons, neutrons, and electrons. Protons and electrons both have an electrical charge. Protons have a positive charge. Electrons have a negative charge. Neutrons do not have a positive or a negative charge. Most atoms have the same number of protons and electrons. Protons and neutrons form the nucleus of the atom. The nucleus is at the center of an atom. Electrons circle around the nucleus like the planets orbit the sun.
 
   Scientists have learned that electrons can move from one atom to another. This creates electricity. You can see electricity in many forms. Lightning is a form of electricity. When you pull a sweater over your hair or rub your feet on the carpet you create static electricity. Electricity can also be made by man. This is how we get electricity to use at our houses. There are many ways that it can be made. It can be made using energy from water flowing down at a dam. It can be made by using the power of the wind. It can also be made by burning fuel. After electricity has been made, it can be moved to other places. A wire is a way of moving electricity. Electrons move from atom to atom along the wire. This creates a current of electricity. Wires run from electrical power plants to homes, schools, and businesses. The wires carry electricity to power our lights and many of our electronic devices.



Name _____________________________ Date ___________________ What Is Electricity?

1.   You have to know about ______ to understand what electricity is.
  Money
  Atoms
  Lightning
  Wires

2.   ______ have a negative electrical charge.
  Protons
  Electrons
  Neutrons
  All of the above

3.   Electricity can be made by ______.
  Falling water
  Burning fuel
  Wind
  All of the above

4.   Electricity is created when______.


5.   How is electricity brought to our homes?
    


Most of the electricity made in the United States comes from burning fuels, such as coal. There are many people who believe that the United States needs to find a better way to make electricity. Why do you think that people do not like this method of making electricity? List as many reasons as you can think of.
Electrical Circuits
By Brandi Waters
  

You have already learned about electricity. You know that electricity is a stream of electrons moving from atom to atom. Electrons have a negative charge. They move toward atoms with a positive charge. When electrons move, electricity is made.
 
Electrons cannot jump across a distance. There must be a path for electrons to follow. The path must be a series of atoms that can accept an electron. We call this path a circuit. People have learned how to build and manipulate circuits to move electricity. We use circuits to bring electricity into our homes. We use circuits to move electricity through our computers, telephones, toys, and even our cars.
 
Every time you flip a light switch in your house, you are using a circuit. The light bulb glows when electrons are flowing through it. The light bulb only glows when the switch is on. This is because the circuit is complete when the switch is on. Wiring in your house forms a path for electricity to flow. The wires are attached to the light bulb. The wires are also connected to the switch on the wall. When the switch is turned off, there is a break in the circuit. When the circuit is broken, electricity cannot flow through the light bulb. When the switch is turned on, the switch forms a bridge that completes the circuit. Electrons can flow through the wires, through the switch, and through the light bulb. The light bulb glows and lights your room. Circuits help people control when and where electricity flows.



Name _____________________________ Date ___________________ Electrical Circuits

1.   Electricity is ______.
  Negatively charged
  A stream of electrons
  Made when electrons move from atom to atom
  All of the above


2.   Electrons flow on a path called ______.


3.   People use electrical circuits to ______.
  Control where electricity flows and when it is flowing
  Control how much electricity is made
  Make electrons jump to positively charged atoms
  All of the above


4.   When a switch in an electrical circuit is turned off, ______.


5.   What is used to make the circuits, or paths that electricity can flow through, in our homes?
  Switches
  Electrons
  Wires
  Light bulbs

Electrical Circuits
Explain what a switch does in an electrical circuit. How does the circuit change when the switch is turned from on to off?

















     Name _____________________________ Date ___________________ Electrical Circuits
Explain what a switch does in an electrical circuit. How does the circuit change when the switch is turned from on to off?
Electrical Circuits - Answer Key

1    All of the above
2  a circuit or an electrical circuit
3    Control where electricity flows and when it is flowing
4  it causes a break in the circuit OR electricity cannot flow through the circuit
5    Wires




Phet online series makers

Picture
Picture

Number 1 (Google Doc)

Picture
Picture
Picture
Picture

 

Picture
      

Picture

    

Picture
       

Picture
2. Symbiosis (Symbiotic Relationship)    1     In the wonderful world of nature, some animals love forming partnerships with other animal species, with plants, and with microorganisms. We have a special name for such interesting arrangements. We call it "symbiosis" that literally means "living together".
 
2     Do both species involved in a symbiotic relationship benefit from their partnership? Well, the question itself is open for debate. While some scientists restrict the meaning of symbiosis to a "win-win" situation for both participants, others disagree. Using a broader definition, we are going to explore the three types of symbiotic partnerships.
 
3     When two species engage in a mutually beneficial symbiotic relationship, they are in the so-called "mutualism" type of symbiosis. To understand mutualism better, let's examine the interaction between clown fish and an anemone. While most fish stay away from an anemone for fear of touching its poisonous tentacles, clown fish have a special coat on their skin that protects them from getting stung. (This trick does not work for all anemones though. Clown fish can only have symbiotic relationships with 10 of the 1,000 different anemone species in the world.) Swimming carefree and unharmed among their host's deadly tentacles, clown fish know very well that their predators do not dare to come near them. Plus, clown fish get to pick up and eat the leftover bits discarded by their landlord. What does the anemone get in return for offering clown fish a safe haven? Well, first and foremost, it kills and feeds on fish that are eyeing its tenant! Aside from that, clown fish pay their rent by cleaning up food scraps and dead anemone tentacles.
 
4     The second type of symbiosis is called "commensalism" in which only one party emerges as the clear winner. As for the other party involved, it neither benefits nor suffers from the partnership. Okay, let's look at the case of remoras and sharks. Remoras have sucking disks above their heads that they use to attach themselves to large marine animals, especially sharks. Hence, remoras are also known as "shark suckers" or "sucker fish." Remoras are the clear winners in this relationship. First, they save energy by delegating the task of swimming to their host. Second, they do not have to worry about predators whose exact nightmare is to run into hungry sharks. Third, they feed on the food scraps of their host's latest victim or the parasites from their host's skin. What do sharks get out of this partnership? Well, nothing really. Except for remoras' parasite-cleaning work that they can live without, sharks gain nothing and lose nothing by having remoras around.
 
5     "Parasitism" is the third and last type of symbiosis. In this relationship, one (the parasite) wins and the other (the host) loses. There are many examples of parasitism around us. For instance, like remoras, leeches also have sucking disks. When a leech finds an ideal host, say a little boy named Frank, it fastens itself firmly onto his skin and starts sucking blood. Amazingly, it can consume about 3 times its weight of blood in one feeding! Frank, in the meantime, not only loses his blood but also runs a risk of getting infected by the viruses that the leech may carry. While all parasites do harm to their hosts, some extremists go as far as killing their hosts!

Copyright © 2010 edHelper

Name _____________________________ Date ___________________ Symbiosis (Symbiotic Relationship)

1.   What is the term that we use to describe two species living together?
  Symbiosis
  Migration
  Camouflage
  Hibernation
2.   The relationship between sharks and remoras is characterized as parasitism.
  False
  True
3.   If we eat undercooked or raw fish, we may inadvertently consume tapeworms hidden inside the fish. We can get really sick if we have tapeworms lurking in our intestines. What kind of relationship exists between humans and tapeworms?
  Parasitism
  Commensalism
  Mutualism
4.   Why do remoras attach themselves to sharks?
  To hitch a free ride
  To gain access to free food
  To avoid getting eaten by other fish
  All of the above
5.   Which of the following is a "win/no effect" relationship?
  Mutualism
  Parasitism
  Commensalism
6.   Which of the following statements about mutualism is correct?
  Clown fish and anemones have a mutualism relationship.
  Both parties involved in a mutualism relationship suffer from the alliance.
  Leeches and their hosts have a mutualism relationship.
  All scientists agree that mutualism is the only form of symbiosis.
 

Name _____________________________ Date ___________________ Symbiosis (Symbiotic Relationship)

7.   Clown fish are able to live with every anemone species because they have a special coat on their skin preventing them from getting stung by the anemone's poisonous tentacles.
  False
  True
8.   What happens to the host in a parasitism relationship?
  Nothing happens to it.
  The parasites may kill it.
  It eats the leftover bits discarded by the parasites.
  It relies on the parasites for protection.
9.   Symbiosis is a behavior that exists strictly between two different animal species.
  False
  True

1. Click on Picture.

Picture

Picture

Click on the Marshmallows

Picture
We will be doing this activity on Friday. Have a peek.