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The Understanding brightness skill in Grade 1 Physical Science involves recognizing and describing the intensity of light. It means students learn to identify differences in how bright or dim a light source is, such as a light bulb or the sun, and understand that the amount of light affects how well they can see objects.
Effective activities to train students' understanding of brightness in Physical Science include hands-on experiments with light sources and filters to explore light intensity, using photometers or light sensors to measure and compare brightness levels, creating models to demonstrate the inverse-square law, and conducting observational studies on how distance and medium affect the perceived brightness of a light source.
To test a Grade 1 student's understanding of brightness, you can perform simple experiments using objects that reflect different levels of light. For example, compare the brightness of a shiny metal spoon, a piece of white paper, and a piece of black cloth under the same light source.