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Read the level of the liquid at the mark on the cylinder.
I think you are talking about a graduated cylinder. When measuring liquids in a grad. cylinder you should read at the bottom of the miniscus ( the curved surface of the water or other liquid).
Of a solid, measuring the quantity of fluid displaced by the object should suffice. Of a liquid, measuring its volume with a measuring cylinder or similar. Of a gas, measuring its mass or volume under conditions of standardized temperature and pressure
The curve on a graduated cylinder is called a meniscus. It occurs due to surface tension between the liquid and the container, causing the liquid to curve at the edges. When measuring volume in a graduated cylinder, the bottom of the meniscus should be used for accurate readings.
A measuring cylinder
A graduated cylinder or a micropipette would be appropriate laboratory equipment for measuring out 8.0 ml of liquid accurately.
with measuring tools
You should always measure the volume of liquid in a graduated cylinder at the bottom of the meniscus, where the curve of the liquid meets the cylinder's surface. This ensures an accurate reading of the volume contained in the cylinder.
A graduated cylinder would work.
I donno
When measuring the volume of a liquid in a graduated cylinder or similar container, the volume is typically measured to the bottom of the meniscus (the curved surface of the liquid). This is because the liquid forms a concave shape at the edges due to surface tension, and the volume should be read at the lowest point of the curve for accuracy.
If your question is why must a graduated cylinder be dry to measure something then the answer is so that it only measures the volume of what you add to it. If it is wet or otherwise dirty, the contaminants will obviously take up some space and provide a total higher volumetric measurement than should be yielded by whatever it is you are measuring.