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Inferences and central idea hard

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Inferences and central idea hard
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25 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The Hubble Space Telescope (HST) is projected to maintain operation until at least 2030, but it has already revolutionized high-resolution imaging of solar-system bodies in visible and ultraviolet (UV) light wavelengths, notwithstanding that only about 6% of the bodies imaged by the HST are within the solar system. NASA researcher Cindy L. Young and colleagues assert that a new space telescope dedicated exclusively to solar-system observations would permit an extensive survey of minor solar-system bodies and long-term UV observation to discern how solar-system bodies change over time. Young and colleagues’ recommendation therefore implies that the HST ______

will likely continue to be used primarily to observe objects outside the solar system.

will no longer be used to observe solar system objects if the telescope recommended by Young and colleagues is deployed.

can be modified to observe the features of solar system objects that are of interest to Young and colleagues.

lacks the sensors to observe the wavelengths of light needed to discern how solar system bodies change over time.

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Some animal-behavior studies involve observing wild animals in their natural habitat, and some involve capturing wild animals and observing them in a laboratory. Each approach has advantages over the other. In wild studies, researchers can more easily presume that the animals are behaving normally, and in lab studies, researchers can more easily control factors that might affect the results. But if, for example, the results from a wild study and a lab study of Western scrub-jays (Aphelocoma californica) contradict each other, one or both of the studies must have failed to account for some factor that was relevant to the birds’ behavior.

A. When the results of a natural-habitat study and those from a lab study of a wild animal such as the Western scrub-jay conflict, the study in the natural habitat is more likely than the lab study to have accurate results.

B. Studying wild animals such as the Western scrub-jay in both their natural habitat and lab settings is likely to yield conflicting results that researchers cannot fully resolve.

C. Wild animals such as the Western scrub-jay can be effectively studied in their natural habitat and in the lab, but each approach has drawbacks that could affect the accuracy of the findings.

D. Differing results between natural-habitat and lab studies of wild animals such as the Western scrub-jay are a strong indication that both of the studies had design flaws that affected the accuracy of their results.

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Algae living within the tissues of corals play a critical role in keeping corals, and the marine ecosystems they are part of, thriving. Some coral species appear brown in color when healthy due to the algae colonies living in their tissues. In the event of an environmental stressor, the algae can die or be expelled, causing the corals to appear white. To recover the algae, the bleached corals then begin to produce bright colors, which block intense sunlight, encouraging the light-sensitive algae to recolonize the corals.

These corals have likely been subjected to stressful environmental conditions.

These corals are likely more vulnerable to exposure from intense sunlight than white corals are.

These corals have likely recovered from an environmental event without the assistance of algae colonies.

These corals are more likely to survive without algae colonies than brown corals are.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Ancestral Puebloans, the civilization from which present-day Pueblo tribes descended, emerged as early as 1500 B.C.E. in an area of what is now the southwestern United States and dispersed suddenly in the late 1200s C.E., abandoning established villages with systems for farming crops and turkeys. Recent analysis comparing turkey remains at Mesa Verde, one such village in southern Colorado, to samples from modern turkey populations in the Rio Grande Valley of north central New Mexico determined that the latter birds descended in part from turkeys cultivated at Mesa Verde, with shared genetic markers appearing only after 1280. Thus, researchers concluded that

conditions of the terrains in the Rio Grande Valley and Mesa Verde had greater similarities in the past than they do today.

some Ancestral Puebloans migrated to the Rio Grande Valley in the late 1200s and carried farming practices with them.

Indigenous peoples living in the Rio Grande Valley primarily planted crops and did not cultivate turkeys before 1280.

the Ancestral Puebloans of Mesa Verde likely adopted the farming practices of Indigenous peoples living in other regions.

Tags

NGSS.HS-ESS3-1

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

To address the susceptibility of materials used in components of high-performance machinery, such as aircraft engines, to creep (deformation that is induced by persistent mechanical stress and that often occurs at elevated temperatures), materials researchers have developed silicon carbide (SiC) fibers for producing aerospace composites. Testing the thermomechanical properties of several commercially available SiC fibers, Ramakrishna T. Bhatt et al. found that in comparison with two polymer-derived SiC fibers, a nitrogen-treated SiC fiber exhibited a lower minimum creep rate, a measure of the rate at which a stress-exposed material deforms at a constant temperature and uniaxial load. The finding suggests that ______

A. unlike the two polymer-derived SiC fibers, the nitrogen-treated SiC fiber can substantially inhibit creep, provided that temperatures and loads are consistent.

B. the two polymer-derived SiC fibers likely hold similar potential for reducing the creep resistance of materials exposed to stress and elevated temperatures, thus prolonging the life span of aerospace machinery.

C. composites based on the two polymer-derived SiC fibers have chemical properties that may improve the mechanical and thermal stability of aerospace equipment to a greater extent than do composites based on the nitrogen-treated SiC fiber.

D. aerospace composites containing the nitrogen-treated SiC fiber may have the ability to withstand mechanical stress for a longer period of time than can aerospace composites containing either of the two polymer-derived SiC fibers.

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The following text is adapted from Countee Cullen’s 1926 poem “Thoughts in a Zoo.” They in their cruel traps, and we in ours, Survey each other’s rage, and pass the hours Commiserating each other’s woe, To mitigate his own pain’s fiery glow. Man could but little proffer in exchange Save that his cages have a larger range. That lion with his lordly, untamed heart Has in some man his human counterpart, Some lofty soul in dreams and visions wrapped, But in the stifling flesh securely trapped. Based on the text, what challenge do humans sometimes experience?

They cannot effectively tame certain wild animals because of a lack of compassion.

They cannot focus on setting attainable goals because of a lack of motivation.

They quickly become frustrated when faced with difficult tasks because of a lack of self-control.

They have aspirations that cannot be fulfilled because of certain limitations.

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Linguists have noted many similar examples of this phenomenon occurring in other languages, suggesting that social media

is more useful for studying informal language than for studying formal or official language.

appears to be exerting an exceptionally strong inf

may give linguists a somewhat misleading sense of how languages are changing.

does not merely register changes in language usage but can facilitate such changes.

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