Melanie wants to observe the effect of two new fertilizers on the growth of plants. Three identical plants having a height of 15 cm were used for the experiment. No fertilizer was added to the first plant, 100 g of Fertilizer A was added to the second plant, and 100 g of Fertilizer B was added to the third plant. All other growing conditions of the plants were kept constant. Which step of the scientific method did Melanie do here?

Which of these sequences lists the correct order for the creation of sedimentary rock from sediment? a. deposition, burial, compaction, cementation b. burial, deposition, compaction, cementation c. compaction, deposition, burial, cementation d. cementation, deposition, burial, compaction

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

How many neutrons does an element have if its atomic number is 50 and its mass number is 166