You would zero your balance to maintain accuracy in your measurements, in other words, to get the correct weight. A balance works much like a see-saw. If you have two people of equal weights on opposite sides, the see-saw balances, but if one of them sits closer to the center than the other, they APPEAR to have different weights.

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1) a compound microscope involves 2 lenses (the ocular that you look through, and the objective down by the slide). The magnification of these is multiplied to get the total magnification. For example, if the ocular has a magnification of 10x, and the objective has a magnification of 10x, the total magnification would be 100x. Also, the microscopes will allow you at most to see the organelles within cells. You CANNOT see atoms with any of the microscopes you listed.

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When measuring something with a meniscus, you should always measure at the lowest point of the curve. For no particular reason other than scientists have accepted that has the standard.

A meniscus is the curvature that is seen when water is poured into a relatively narrow glass cylinder, for example a graduated cylinder. This is caused by the water having a greater attraction for the sides of the cylinder than for itself. Because of this, it appears to “crawl” up the sides of the tube.

Best Answer: The difference is a simple microscope has one lens where a compound microscope has an objective lens and an eyepiece with a longer focal length. a simple microscope only has one type of lens, usually objective lens, but a compound microscope had both objective lens and ocular lens.you should zero your balance because since a menicus can not be read properly. one usually has to estimate the amount by reading it at eye level. To actually know the correct amount thats in your pipette, you need to set your balance at zero. a simple microscope has one lens (handheld), and a compound microscope has more than one lens (an eyepiece & objectives)A compound microscope will have many different zoom options when choosing what level of magnification. Its magnification also relies on more than one lense (hence the word compound).A simple microscope will magnify much less than a compound one.A magnifying class will do just that magnify the image. Any time you magnify something you lose detail. Compund and even some simple microscopes use a x10 magnification on the eyepiece that will reduce the loss of detail.A meniscus is just the center of something. So If you look at a scale the middle part where the scale teeters is the meniscus. When you weigh something you must make sure the scale is equal to zero. If you do not then your measurement will not be accurate because you may be starting with an incorrect reading.