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Topics > Physics > Forces and Motion

	Project title	Surface tension of water
	Difficulty Level	Middle school
	Project page	Click here to view this science project
Description
This science fair project was conducted to observe how adding salt to water and increasing its temperature can affect the surface tension of water. The experiment was done by adding grains of rice to a piece of aluminum foil floating on water of varying temperatures, i.e. of 15°C, 25°C, 35°C, 45°C and 55°C.
Instructions preview
1. For this science fair project, the independent variable is the salinity of the water and its temperature – 15°C, 25°C, 35°C, 45°C and 55°C. The dependent variable is the weight exerted on the aluminum foil before it sinks. This is determined by gradually adding grains of rice on the surface of the aluminum foil. The constants (control variables) are the size of the aluminum foil, the size of the grains of rice and the room temperature. 2. The 2 beakers are labeled “pure water” and “salt water”. The beakers are each filled with 200ml of distilled water. In .....

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