|Physical Science||Energy/Light/Heat/Sound 4C3.00||Process of Science||Collecting Data 1.3 b|
CONTENT STANDARD: Physical Science
CONTENT TOPIC: Energy/Light/Heat/Sound
CONCEPT: Sound, heat, and light have many properties.
CONTENT OBJECTIVE: 4C3.00 To understand the properties of light
INSTRUCTIONAL OBJECTIVES: The learner will:
TN COMPONENT OF SCIENCE: Process of Science
BENCHMARK: A journal should be kept describing observations made. (Entries should distinguish actual observations of what was observed.)
Place a pencil in a glass half full of water. Observe the differences in appearances above and below the water. (Discuss the substances - water and air.) What happens to light rays as they pass from one substance to another? (They may be bent when they pass from one substance to another causing refraction.) Record your observations and conclusions in writing and illustration.
Shine a flashlight through a long cardboard tube. What do you see? (Light traveling in a straight line.) Record what you see. Now, bend the tube. What happens? (response) Record your results. (Light travels in a straight line, as long as it is not passed through a substance which might cause it to bend.)
What do you see when you look in a mirror? (Your image) When light strikes a smooth surface, it bounces off. This bouncing back is called reflection. Shine a flashlight into a mirror. Record what happens.
(Have ready clear glass, waxed paper, black construction paper.) Shine the flashlight to see if the rays pass through the materials. Record your observations of each. (Light can pass through some materials and can be stopped by others. Terms TRANSPARENT, TRANSLUCENT and OPAQUE might be taught here.)
(Have ready projector and screen.) What happens when I step between the projector, when it is turned on, and the screen? (response) Let's place some other objects between the projector and the screen. What happens? (response) Why does this happen? (response) Write your conclusions on your paper. (Shadows are formed because light travels in a straight line and does not pass through an opaque object.)
Shine a light through a prism. Record what happens. (White light is broken into a spectrum.) Record the colors you see. These colors are pure because they cannot be broken down. Take some poster board and make a color wheel, using the colors you see in the prism. (Red, yellow, green, blue) After you have made your wheel, give it a spin. What happens? (Light will appear only as white.) Record observations in your journal.
2. You may also want to use soap bubbles and rainbows to talk about white light and the visible spectrum.
3. Use light sensor probe with computer graphic technology for experimentation. (example: Abquest Program)
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