Choose the best answer. Which is produced during photosynthesis? I. glucose II. sulfur III. carbon dioxide (a) I only (b) III only (c) I and III (d) II and III

Ocean acidification represents a key component of the (a) nitrogen cycle. (b) hydrologic cycle. (c) phosphorus cycle. (d) carbon cycle. (e) sulfur cycle.

Human interaction with the nitrogen cycle is primarily due to (a) the leaching of nitrates into terrestrial ecosystems. (b) the breakdown of ammonium into ammonia for industrial uses. (c) the interruption of the mineralization process in urban areas. (d) the acceleration of the nitrification process in aquatic ecosystems. (e) the decreased assimilation of ammonium and nitrates.

Choose the best answer for the following. Acid rain is associated with which geochemical cycle? (a) potassium (b) carbon (c) phosphorus (d) sulfur

Beginning at the lowest trophic level, arrange the following food chain found on the Serengeti Plain of Africa in the correct sequence. (a) Shrubs-gazelles-cheetahs-decomposers, (b) Shrubs-decomposers-gazelles-cheetahs, (c) Shrubs-decomposers-cheetahs-gazelles, (d) Gazelles-decomposers-cheetahs-shrubs, (e) Decomposers-cheetahs-shrubs-gazelles.

What products of photosynthesis are starting materials for cellular respiration? F. glucose and oxygen G. heat energy and ATP H. carbon dioxide and water I. light energy and chlorophyll

A large stationary Brayton-cycle has-turbine power plant delivers a power output of 100 000 hp to an electric generator. The minimum temperature is the cycle is 540 R, and the maximum temperature is 2900 R. The minimum pressure in the cycle is 1 atm, and the compressor pressure ratio is 14 to 1. Calculate the power output of the turbine, the fraction of the turbine output required to drive the compressor, and the thermal efficiency of the cycle.

Which macronutrient is required by humans in the largest amounts? (a) Calcium, (b) Nitrogen, (c) Sulfur, (d) Potassium, (e) Magnesium.

The largest carbon pool is found in (a) oceans. (b) the atmosphere. (c) sedimentary rock. (d) living organisms. (e) fossil fuels.

Which of the following could be a cause of decreased evapotranspiration? (a) Increased precipitation, (b) Decreased runoff, (c) Increased percolation, (d) Increased vegetation, (e) Increased sunlight.

Choose the best answer. The following table shows the efficiencies of systems providing lighting to three different houses.

$$\begin{array}{|l|c|c|c|} \hline \text{ } & \text{House A (percent efficiency)} & \text{House B (percent efficiency)} & \text{House C (percent efficiency)}\\ \hline \text{Power plant} & \text{55} & \text{33} & \text{33}\\ \hline \text{Electrical transmission lines} & \text{90} & \text{90} & \text{90}\\ \hline \text{Lighting} & \text{5} & \text{20} & \text{25}\\ \hline \end{array}$$

Overall, which represents the most efficient system? (a) House A (b) House B (c) House C (d) Houses A and B

Choose the best answer. Which represents a system in steady state? I. The birth of chameleons on the island of Madagascar equals their death rate. II. Evaporation from a lake is greater than precipitation and runoff flowing into the lake. III. The steady flow of the Colorado River results in more erosion than deposition of rock particles. (a) I only (b) II only (c) III only (d) I and II

During radioactive decay I. there is a release of material from the nucleus of unstable isotopes. II. there is a change in the half-life of an element. III. an element is changed into a different element. (a) I only, (b) II only, (c) I and II only, (d) I and III only, (e) I, II, and III.

Acid rain is associated with which geochemical cycle? (a) Potassium, (b) Calcium, (c) Carbon, (d) Phosphorus, (e) Sulfur.