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Quick quantitative measurements: Built-in photogate slots make data collection fast and reliable
cohesive investigation
motion down an incline
All-in-one versatility: Each device includes 10 sensors
Why Teachers Love the Horizon Fuel Cell Car Science Kit
Secchi Disk Electricity & Magnetism Quick quantitative measurements: Built-in photogateTurn how clear a lake looks into a number you can track The Secchi Disk is an 8. 75" white plastic disk marked with black and white quadrants, attached to a weighted, foot marked line. Lower it into a lake, pond, stream, or aquarium until the pattern disappears from view, then read the depth off the line. That depth, the Secchi depth, is a standard field measurement of water clarity used by limnologists and water quality monitoring programs. The
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