Question

factors changed by the person performing the experiment.
observation
dependent variable
model
independent variable
the solid outer layer of the earth.
lithosphere
mantle
moho
asthenosphere
which of the following is not one of the major processes in which energy and matter repeatedly move through a cycle?
nitrogen cycle
phosphorus cycle
bicycle
carbon cycle

Explanation:

1. In an experiment, the factor changed by the experiment - er is the independent variable. It is manipulated to observe its effect on the dependent variable.
2. The solid outer layer of the Earth is the lithosphere. The mantle is below the lithosphere, and the asthenosphere is a part of the upper - mantle that is semi - fluid.
3. The nitrogen cycle, phosphorus cycle, and carbon cycle are major biogeochemical cycles through which energy and matter move in cycles. There is no such major cycle called "b - cycle".

Answer:

1. independent variable
2. lithosphere
3. b - cycle