Exam 5: Element Cycles

The phosphorus cycle differs from the others in that

Carbon dioxide dissolve in water to form

Select the true statement.

Element cycles also exist for metals such as mercury, lead, tin, and iron.

The geosphere of our planet is composed of the

Why is oxygen NOT an element one would normally find in the atmosphere of a planet?

The compartments of our planet are

Nitrogen fixation is the process that converts

Why is nitrogen an element one would normally find in the atmosphere of a planet?

The only significant way oxygen (O₂) enters the atmosphere is through

Which of the following cycles does not have an atmospheric component?

Which of the following produces useful nitrogen compounds to fertilize crops?

Continuous processes operating with little change for long periods of time are called

Respiration is the

Limestone is a very compressed form of

Photosynthesis is the process by which

The average time that an atom of a given element, or a molecule of a given substance, remains in a compartment before it is removed in some way is referred to as the

Modern farmers usually use nitrogen fertilizers which are synthesized using the

Which cycle requires photosynthesis?

Hydrogen is one of the most common elements in organic material.