What is meniscus ? why is it necessary to know about it when measuring liquids quizzlet?

The downward or upward curve at the surface of liquid in a container is said to be the meniscus of the liquid,  which occurs due to the surface tension. This curve can be concave or convex depending on how the molecules of liquid interact with surface of the container.  The reading of the meniscus should always be done at the eye-level.

When the particles of the liquid are more attracted to the container than to each other then a concave meniscus occurs whereas when the particles of the liquid are more attracted to each other than to the container then a convex meniscus occurs.

The bottom of the curve will be read for a concave meniscus and for convex meniscus,  the top of the curve gives the correct reading of the volume of liquid.

Explained

Explanation:

The shape of the liquid surface when kept in a beaker or test tube, is called meniscus. A meniscus is of two types a convex or a concave meniscus. The downward bend of the surface is called convex meniscus like in mercury glass combination. Whereas the upward bend is called concave meniscus. Like in Water and glass combination. When mesuring liquids we must have an idea of meniscus to get the exact value of measurement.

if you're asking what comes out, it's steam.

the objects have the same charge.