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C. Electricity and Magnetism
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C. Electricity and Magnetism
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C. Electricity and Magnetism
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1. Identify and describe the sources and uses of electricity in daily life.
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1. Recognize and describe the effects of static electric charges.
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a. Identify sources of electricity.
- Electrical outlets
- Batteries
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a. Observe and describe how to produce static charges by friction between two surfaces.
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b. Identify the devices that use electricity to produce light, heat, and sound. (Students should be cautioned not to experiment with sources of electricity without adult supervision.)
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b. Observe the phenomena produced by the static charges.
- Light
- Sound
- Feeling a shock
- Attracting lightweight materials over a distance without making contact
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2. Investigate and provide evidence that electricity requires a closed loop in order to produce measurable effects.
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a. Identify the source of electricity needed to produce various effects:
- Light - flashlight (battery)
- Heat - hot plate, hairdryer (outlet, battery)
- Sound - Ipod (battery) , doorbell(electrical wiring)
- Movement - mechanical toys (battery, outlet)
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b. Investigate and describe (orally or with diagrams) how to light a light bulb or sound a buzzer given a battery, wires, and light bulb or buzzer.
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c. Describe and compare the path of electricity (circuit) within this system that caused the light to light or the buzzer to sound to those that do not affect the light or buzzer.
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d. Observe, describe and compare materials that readily conduct electricity and those that do not conduct electricity.
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e. Provide evidence from observations and investigations that electrical circuits require a complete loop through which electricity can pass.
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3. Cite evidence supporting that forces can act on objects without touching them.
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a. Investigate and describe the effect that two magnets have on each other.
- Like poles repel
- Opposite poles attract
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b. Based on observations, describe the effect of a magnet on a variety of objects including those that are metallic or non-metallic; those made with iron or made with other metals; and on other magnets.
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c. Compare a compass to a magnet based on observations of the effect a variety of objects (metallic or non-metallic; those made with iron or other metals; and magnets) have on a compass.
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d. Provide examples to demonstrate the different ways a magnet acts on objects and how the objects respond.
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e. Investigate and describe how electricity in a wire affects the needle of a compass.
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f. Describe how to make a simple electromagnet with a battery, a nail, and wire.
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g. Cite examples showing that magnetic, electrical, and gravitational forces can act at a distance.
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D. Wave Interactions
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D. Wave Interactions
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D. Wave Interactions
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2. Identify and describe the relationship between a sound and the vibrations that produce it.
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a. Based on observations of objects that produce sound, relate vibration to the back and forth motion of parts of the object.
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b. Pose questions concerning the relationship between loudness or pitch and the vibration of an object.
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