PURPOSE
The purpose of my experiment was to determine the effects of water solutions that contain different levels of nitrogen on bean growth.
I became interested in this idea when I noticed my dad putting lawn clippings on our vegetable garden and I wondered if it would help the garden to be healthier and produce more vegetables.  [...]

Difficulty:

Objective
In this experiment you will measure the apparent size of an object through a magnifying lens at different optical distances compared to the actual size of the object and discover a relationship between magnification and optical distance of a lens.
Introduction
One important factor for any lens is the power of magnification, a measurement of how [...]