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? Choices: - multi layers build up - smoothness - thickness - softness A:
softness
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? Choices: - mitosis - symbiosis - reproduction - photosynthesis A:
photosynthesis
Q: 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? Choices: - tactile stress - friction stress - composition stress - tension stress A:
A: tension stress
Question: 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? Choices: - innervation - autogeneration - interconnection - coevolution A:
Answer: coevolution
*Question*
Answer the following question given this paragraph: 4.1 Development of Force Concept Dynamics is the study of the forces that cause objects and systems to move. To understand this, we need a working definition of force. Our intuitive definition of forcethat is, a push or a pullis a good place to start. We know that a push or pull has both magnitude and direction (therefore, it is a vector quantity) and can vary considerably in each regard. For example, a cannon exerts a strong force on a cannonball that is launched into the air. In contrast, Earth exerts only a tiny downward pull on a flea. Our everyday experiences also give us a good idea of how multiple forces add. If two people push in different directions on a third person, as illustrated in Figure 4.3, we might expect the total force to be in the direction shown. Since force is a vector, it adds just like other vectors, as illustrated in Figure 4.3(a) for two ice skaters. Forces, like other vectors, are represented by arrows and can be added using the familiar head-to-tail method or by trigonometric methods. These ideas were developed in Two-Dimensional Kinematics. Q: What do we call something that pushes or pulls on an object? Choices: - reaction - annoyance - friction - force A:
**Answer**
force
Answer the following question given this paragraph: Q: Slow-twitch or fast-twitch and oxidative or glycolytic describe what type of fibers? Choices: - digestion muscle fibers - coronary muscle fibers - capillaries - skeletal muscle fibers A:
skeletal muscle fibers