input: OPTIONS:
- erosion
- currents
- wind
- precipitation Now, answer this question: Answer the following question given this paragraph: Condensation creates precipitation. Precipitation includes rain, snow, hail, and sleet. The precipitation allows the water to return again to the Earth's surface. Q: What natural process allows water to return again to the earth's surface? A:
A:
output: precipitation

Answer the following question given this paragraph: Men and women share most of the same organs. We all have skin, a heart, and lungs. Men and women differ only in their reproductive organs. Q: What organ system is different in men and women? A:

OPTIONS:
- nervous organs
- respratory organs
- lymphatic organs
- reproductive organs

Answer: reproductive organs

Problem: OPTIONS:
- insect hormones
- animal proteins
- animal hormones
- plant hormones
Q: Answer the following question given this paragraph: Plant hormones include ethylene, gibberellins, cytokinins, absciscic acid, and auxins. Q: Ethylene, gibberellins, cytokinins, absciscic acid, and auxins are examples of what? A:
Answer: plant hormones

Problem:OPTIONS:
- conifers
- gymnosperms
- grasses
- angiosperms

Answer the following question given this paragraph: Angiosperms , or flowering plants, are the most abundant and diverse plants on Earth. Angiosperms evolved several reproductive adaptations that have contributed to their success. Like all vascular plants, their life cycle is dominated by the sporophyte generation. A typical angiosperm life cycle is shown in Figure below . Q: What are the most diverse plants on earth? A:
****
A: angiosperms

Answer the following question given this paragraph: Q: Water affects the availability of what important element in aquatic environments and in flooded soils? A:
OPTIONS:
- carbon
- nitrogen
- carbon dioxide
- oxygen
oxygen

Answer the following question given this paragraph: Reversible Processes Both isothermal and adiabatic processes such as shown in Figure 15.13 are reversible in principle. A reversible process is one in which both the system and its environment can return to exactly the states they were in by following the reverse path. The reverse isothermal and adiabatic paths are BA and CA, respectively. Real macroscopic processes are never exactly reversible. In the previous examples, our system is a gas (like that in Figure 15.9), and its environment is the piston, cylinder, and the rest of the universe. If there are any energy-dissipating mechanisms, such as friction or turbulence, then heat transfer to the environment occurs for either direction of the piston. So, for example, if the path BA is followed and there is friction, then the gas will be returned to its original state but the environment will notit will have been heated in both directions. Reversibility requires the direction of heat transfer to reverse for the reverse path. Since dissipative mechanisms cannot be completely eliminated, real processes cannot be reversible. There must be reasons that real macroscopic processes cannot be reversible. We can imagine them going in reverse. For example, heat transfer occurs spontaneously from hot to cold and never spontaneously the reverse. Yet it would not violate the first law of thermodynamics for this to happen. In fact, all spontaneous processes, such as bubbles bursting, never go in reverse. There is a second thermodynamic law that forbids them from going in reverse. When we study this law, we will learn something about nature and also find that such a law limits the efficiency of heat engines. We will find that heat engines with the greatest possible theoretical efficiency would have to use reversible processes, and even they cannot convert all heat transfer into doing work. Table 15.2 summarizes the simpler thermodynamic processes and their definitions. Q: What is the name of the process in which both the system and its environment can return to exactly the states they were in by following the reverse path? A:
OPTIONS:
- conductive process
- Remote process
- Different Process
- reversible process

Answer:
reversible process