Ascientist testing the affects of a chemical on apple yeild sprays an orchard with the chemical. a second orchard does not receive the chemical. in the fall, the number of apples harvested from each forest is counted. which of the following is the independent (manipulated) variable in the experiment? the chemical the number of apples the first orchard the second orchard

The best answer to the question: Which of the following is the independent (manipulated) variable in the experiment, would be: The chemical.

Explanation:

The reason is that all other variables in the experiment remain the same and are unchanging. The point of the experiment is to see what the effects of a specific chemical, on apple yield, is. To achieve this, the scientist has two orchards, each planted with apple trees and both are expected to produce apples. However, the scientist wants to see how the chemical will affect the total yield. So, the one variable that he manipulates on the experiment, is the chemical itself, spraying one orchard with it, and the other leaving it chemical-free. In the end, the results are counted and a conclusion in reached.

d statement

explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.