Answer the following question given this paragraph: from the atmosphere at sea level. As a diver descends, the increase in pressure causes the body's air pockets in the ears and lungs to compress; on the ascent, the decrease in pressure causes these air pockets to expand, potentially rupturing eardrums or bursting the lungs. Divers must therefore undergo equalization by adding air to body airspaces on the descent by breathing normally and adding air to the mask by breathing out of the nose or adding air to the ears and sinuses by equalization techniques; the corollary is also true on ascent, divers must release air from the body to maintain equalization. Buoyancy, or the ability to control whether a diver sinks or floats, is controlled by the buoyancy compensator (BCD). If a diver is ascending, the air in his BCD expands because of lower pressure according to Boyle's law (decreasing the pressure of gases increases the volume). The expanding air increases the buoyancy of the diver, and she or he begins to ascend. The diver must vent air from the BCD or risk an uncontrolled ascent that could rupture the lungs. In descending, the increased pressure causes the air in the BCD to compress and the diver sinks much more quickly; the diver must add air to the BCD or risk an uncontrolled descent, facing much higher pressures near the ocean floor. The pressure also impacts how long a diver can stay underwater before ascending. The deeper a diver dives, the more compressed the air that is breathed because of increased pressure: If a diver dives 33 feet, the pressure is 2 ATA and the air would be compressed to one-half of its original volume. The diver uses up available air twice as fast as at the surface. Q: As a diver descends, the increase in pressure causes the body's air pockets in the ears and lungs to do what? A:
OPTIONS:
- heat up
- expand
- blow up
- compress
compress

Answer the following question given this paragraph: Feathers are also used all over the world to stuff pillows, mattresses, sleeping bags, coats, and quilting. Goose feathers are preferred because they are soft. Manufacturers often mix goose feathers with down feathers to provide extra softness. Q: Why are goose feathers preferred for stuffing by manufacturers? A:
OPTIONS:
- multi layers build up
- smoothness
- thickness
- softness

Answer: softness

Question: Answer the following question given this paragraph: Abiotic features of rivers and streams vary along the length of the river or stream. Streams begin at a point of origin referred to as source water. The source water is usually cold, low in nutrients, and clear. The channel (the width of the river or stream) is narrower here than at any other place along the length of the river or stream. Headwater streams are of necessity at a higher elevation than the mouth of the river and often originate in regions with steep grades leading to higher flow rates than lower elevation stretches of the river. Faster-moving water and the short distance from its origin results in minimal silt levels in headwater streams; therefore, the water is clear. Photosynthesis here is mostly attributed to algae that are growing on rocks; the swift current inhibits the growth of phytoplankton. Photosynthesis may be further reduced by tree cover reaching over the narrow stream. This shading also keeps temperatures lower. An additional input of energy can come from leaves or other organic material that falls into a river or stream from the trees and other plants that border the water. When the leaves decompose, the organic material and nutrients in the leaves are returned to the water. The leaves also support a food chain of invertebrates that eat them and are in turn eaten by predatory invertebrates and fish. Plants and animals have adapted to this fast-moving water. For instance, leeches (phylum Annelida) have elongated bodies and suckers on both ends. These suckers attach to the substrate, keeping the leech anchored in place. In temperate regions, freshwater trout species (phylum Chordata) may be an important predator in these fast-moving and colder river and streams. Q: In headwater streams, what plant process is mostly attributed to algae that are growing on rocks? A:
OPTIONS:
- mitosis
- symbiosis
- reproduction
- photosynthesis
Answer: photosynthesis

input with options: Answer the following question given this paragraph: Tension stress pulls rocks apart. Tension causes rocks to lengthen or break apart. Tension is the major type of stress found at divergent plate boundaries. Q: Which process or force pulls rocks apart? A:
OPTIONS:
- tactile stress
- friction stress
- composition stress
- tension stress
output: tension stress

Q: Answer the following question given this paragraph: Evolution occurs in response to a change in the environment. Environmental change often involves other species of organisms. In fact, species in symbiotic relationships tend to evolve together. This is called coevolution . As one species changes, the other species must also change in order to adapt. Q: What is the term for species in symbiotic relationships evolving together? A:

OPTIONS:
- innervation
- autogeneration
- interconnection
- coevolution

A: coevolution

Answer the following question given this paragraph: tiny gap between two adjacent neurons across which electrical messages are carried by chemicals called neurotransmitters. Q: Electrical messages are carried by chemicals called what? A:
OPTIONS:
- receptors
- amino acids
- Biotoxins
- neurotransmitters
neurotransmitters