Secretive and wary, weasels are difficult to study in. nature, and many gaps remain in our knowledge of their. reproduction. Two of the species covered in this Wild-. life Note (the ermine and the long-tailed weasel) exhibit.
Extensive - Properties that do depend on the amount of matter present. Mass - A measurement of the amount of matter in a object (grams). Weight - A measurement of the gravitational force of attraction of the earth acting on an object. Volume - A measurement of the amount of space a substance occupies. Length.
The dependent variable would be the growth in height or mass of the plant. The controlled variables would be the type of plant, the type of fertilizer, the amount of sunlight the plant gets, the size of the pots, etc.