Which of the following best describes topsoil? a. topsoil is made entirely of decomposed organic remains. b. topsoil is made of humus and clay minerals washed down from the layer above the topsoil. c. topsoil is made of humus and mineral particles weathered from the soil's parent material. d. topsoil is made entirely of minerals weathered from the underlying parent material.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?

How is the atomic number of a nucleus changed by alpha decay

Precision can be defined as the o exact center of a data set. o reproducibility of a measured value. o correlation between two variables that are measured in a data set agreement between a measured value and an accepted value.