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Download dA Chapter 3: Electricity and Magnetism Duration: 10 days Day 1
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dA Chapter 3: Electricity and Magnetism Duration: 10 days Day 1 I. Objectives 1. Identify the kind of materials that make up a good electromagnet 2. Identify the ways by which the materials can be connected to produce a good electromagnet. 3. Construct a simple electromagnet 4. Show perseverance and interest in observing how electromagnets are connected II. A. Materials: nails big and small Thin copper wire Big copper wires Dry cells big and small B. References: CG S5FE-III i-j-9 Science and Health p.162 Science for Daily Use pp.160-161 https://www.google.com.ph/#q=activity+on+electromagnets C. Process Skills: Observing Comparing Inferring D. Values Integration Resourcefulness in producing recycled materials Patience in using and connecting different materials III. Learning tasks A. Engagement Show picture of 3 kinds of knives to be used in slicing vegetables for vegetable salad. Ask the following questions: dA 1. Which knife do you prefer to use in preparing vegetable salad? Why? 2. Is it important to use appropriate materials? B. Exploration 1. Divide the class into 4 groups 2. Distribute LM copies of the activity 3. Give instructions/guide in doing the activity 4. Let the pupils do activity 1 of LM C. Explanation Background information An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. You have just made a magnet by using electricity. When you disconnected one end of the wire from the battery, the current did not flow anymore. The nail could no longer attract the pins. Its magnetic force was gone. An electromagnet can have magnetic force only when electric current is flowing through it. Important or ideal materials in producing a good electromagnet are the following: Day 2 Exploration Nail – is the core around which the wire is coiled Wire- the conductor where the current flow 1. Divide the class into 4 groups 2.Battery-supplies Distribute LMelectric copiescurrent of the activity 3. Give instructions/guide in doing the activity 4. Let the pupils do activity 2 of LM EXPLANATION dA Background information An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. You have just made a magnet by using electricity. When you disconnected one end of the wire from the battery, the current did not flow anymore. The nail could no longer attract the pins. Its magnetic force was gone. An electromagnet can have magnetic force only when electric current is flowing through it. Important or ideal materials in producing a good electromagnet are the following: Nail – is the core around which the wire is coiled Wire- the conductor where the current flow Day 3electric current Battery-supplies EXPLORATION 1. Divide the class into 4 groups 2. Distribute LM copies of the activity 3. Give instructions/guide in doing the activity 4. Let the pupils do activity 3 - electromagnets of LM EXPLANATION Background information An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. You have just made a magnet by using electricity. When you disconnected one end of the wire from the battery, the current did not flow anymore. The nail could no longer attract the pins. Its magnetic force was gone. An electromagnet can have magnetic force only when electric current is flowing through it. Important or ideal materials in producing a good electromagnet are the following: Day 4 Nail – is the EXPLORATION core around which the wire is coiled 1. Divide the class into 4 groups Wire- the conductor where the current flow Battery-supplies electric current dA 2. Distribute LM copies of the activity 3. Give instructions/guide in doing the activity 4. Let the pupils do activity 4- electromagnets of LM EXPLANATION Background information An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. You have just made a magnet by using electricity. When you disconnected one end of the wire from the battery, the current did not flow anymore. The nail could no longer attract the pins. Its magnetic force was gone. An electromagnet can have magnetic force only when electric current is flowing through it. Important or ideal materials in producing a good electromagnet are the following: Nail – is the core around which the wire is coiled Wire- the conductor where the current flow Battery - supplies electric current Day 5 ELABORATION/EXTENSION Draw a line to connect the materials to the box for like if the material is good for constructing an electromagnet, unlike if is the material does not make a good material for electromagnet. ` Small nail Big nail Thin copper wire like Small battery unlike Big battery e dA EVALUATION Put a check on the statement that shows a good component of an electromagnet. 1. A good electromagnet is composed of a small battery, big nail and a big battery. 2. A good electromagnet is composed of thin wires, big nail and small battery. 3. A. good electromagnet is composed of a small battery , small nail, thin wires. 4. A good electromagnet is composed of a big battery , small nail, thin wires. 5. A good electromagnet is composed of a big battery , small nail, thin wires. IV. ASSIGNMENT Look for any device at home that you no longer use like malfunctioned remote control. Inspect the part that may have caused malfunction. Write it down and report to the class. Day 6 I. OBJECTIVES 1. Conduct an experiment to show variables that affect the strength of an electromagnet. 2. Conduct a simple and useful electromagnet. 3. Name the different uses of an electromagnet. II. A. Materials: Batteries of four different volts pencil thin, insulated wire. Copper wire nails B. References: CG S5FE-III i-j-9 Science spectrum5 pp.200-201 https://www.google.com.ph/#q=activity+on+electrom agnets C. Process Skills: Observing dA comparing Calculating Interpreting data D. Values Integration Honesty and accuracy in recording data III. Learning tasks A. ENGAGEMENT: Form 2 groups of boys versus girls. Play the tag of war game. Form 2 lines. Wind your arms around the waist of a group member in front of you. The boy and the girl in the front line will pull each other hands, see whose group is the toughest. After the game the teacher will inspect which group has the higher number of members and whose group has won. Relate the activity to the strength of an electromagnet later. Review: Inspect the three illustrations. Which picture show correct connection of an electromagnet? Why? 1. 2. 3. Answer the following questions with true or false _____1. Carefulness and accurateness in connecting the materials is very important factor in having a good electromagnet. _____2. Any metallic material can be used as part of a electromagnet. _____3. It is better to use big batteries for big nails. _____4. Wire must be winded tightly on nails so that current will flow on nails. _____5. Wires must be thin. EXPLORATION 1. Divide the class into 4 groups 2. Distribute LM copies of the activity 3. Give instructions/guide in doing the activity 4. Let the pupils do activity 6 electromagnets of LM dA EXPLANATION: Background information Do you know that without the electromagnet many modern appliances that we now use could not work? The electromagnet is a basic part of many electrical devices and appliances. Knowing about the properties of electromagnets is a crucial underpinning for understanding how magnetic fields are generated in nature, in the surface of the Sun, and in the interior of Earth. Electromagnets are widely used as components of other electrical devices, such Day 7 as motors, generators, relays, loudspeakers, hard disks,MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel. EXPLORATION 1. Divide the class into 4 groups 2. Distribute LM copies of the activity 3. Give instructions/guide in doing the activity 4. Let the pupils do activity 7- electromagnets of LM EXPLANATION Background information Do you know that without the electromagnet many modern appliances that we now use could not work? The electromagnet is a basic part of many electrical devices and appliances.Knowing about the properties of electromagnets is a crucial underpinning for understanding how magnetic fields are generated in nature, in the surface of the Sun, and in the interior of Earth. Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks,MRI machines, scientific instruments, Day 8 separation equipment. Electromagnets are also employed in industry for picking and magnetic up and moving heavy iron objects such as scrap iron and steel. dA Day 8 Exploration 1. Divide the class into 4 groups 2. Distribute LM copies of the activity 3. Give instructions/guide in doing the activity 4. Let the pupils do activity 8 electromagnets of LM Background information Do you know that without the electromagnet many modern appliances that we now use could not work? The electromagnet is a basic part of many electrical devices and appliances.Knowing about the properties of electromagnets is a crucial underpinning for understanding how magnetic fields are generated in nature, in the surface of the Sun, and in the interior of Earth. Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks,MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel. Day 9 EXPLORATION: 1. Divide the class into 4 groups 2. Distribute LM copies of the activity 3. Give instructions/guide in doing the activity 4. Let the pupils do activity 9 electromagnets of LM EXPLANATION Background information Do you know that without the electromagnet many modern appliances that we now use could not work? The electromagnet is a basic part of many electrical devices and appliances.Knowing about the properties of electromagnets is a crucial underpinning for understanding how magnetic fields are generated in nature, in the surface of the Sun, and in the interior of Earth. Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel. dA Day 10 ELABORATION/EXTENSION: Let’s make a graph! Directions: Show the average number of paper clips each electromagnet picked up for each voltage tested. Use the averages you calculated on the Electromagnets Data Chart to make a line graph for each of the two electromagnets. EVALUATION: Answer the following True or False questions about magnets and electromagnets: TRUE OR FALSE Write true for correct statements and false for wrong statements 1. A strong electromagnet can be produced by making electricity flow through a coil of wire wound around an iron metal. 2. An electromagnet behaves like a magnet. 3. Different volt of electricity produces the same strength of electromagnet. 4. The higher the volt of battery used. The stronger an electromagnet becomes. 5. An electromagnet is a permanent magnet. ASSIGNMENT : Writing About Magnetism Write about having a magnetic touch. Think about what magnets. As you are thinking, remember the wish for everything he imagination you know about story of King Midas (a king whose touched to become gold was granted). Use your and decide the following: 1. What objects you would want to be attracted to you. 2. What would the objects be made of? 3. Would you be able to use the magnetic touch to solve problems?