Systems of the Biosphere Answers

Which is not an example of an earth system cycle?a.seasonsb.tsunamisc.food webd.day and night

Glacial episodes are an example of _______.a.positive feedbackb.negative feedbackc.the “Daisy model”d.the Gaia hypothesis

Human impact on one system leads to changes in more of Earth’s systems.

Which system protects us from radiation and the vacuum of space? a.geosphereb.hydrospherec.atmosphered.biosphere

The atmosphere is unaffected by changes in the geosphere.

What system facilitates the movement of water between spheres through the process of transpiration? a.geosphereb.hydrospherec.atmosphered.biosphere

What is the main difference between negative and positive feedback?a.Positive feedback leads to system instability, while negative feedback leads to system stability.b.Positive feedback is caused by human impact, while negative feedback occurs naturally.c.Negative feedback ultimately leads to an increase in the first variable, while positive feedback ultimately leads to a decrease in the first variable. d.Positive feedback occurs at a much faster rate than negative feedback.

Which of the following is a function of the atmosphere? a. facilitating the process of rock formation b. providing a moderate, livable climate c. facilitating the process of photosynthesis d. serving as the interface between all spheres Please select the best answer from the choices provided

What is the main energy source that drives global climate?a.solarb.windc.mechanicald.heat