The correct answers are validity; reliability.
Answer 1: <span>The ability of a test to measure what is purports to measure is called validity.</span> Validity is defined as the ability of a test or study to actually to measure what it claims to measure. For instance, if a test aims to measure a population sample's heart rate, but ends up measuring blood sugar levels instead, it does not have validity, since it did not measure what it claimed or set out to measure. <span>
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Answer 2: Reliability refers<span> to the consistency of test results.</span> Reliability can be defines as the ability of a test or measure to consistently produce the same results at different, times, settings or locations. If the same test or measure produces different outcomes or results at different times or locations, it is low in reliability.
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I believe the answer is: A just-noticeable difference
In painting, A just-noticeable difference refers to the amount of things that needed to be change for a difference to be noticeable.
The threshold usually depended on the type of audience that being aimed toward, (for common audience, the threshold of differences would be relatively higher compared to expert audience)<span />
Answer:
C. Conservation
Explanation:
Mass is defined as "the amount of matter held within a body and hence stays the same, irrespective of our location, since the amount of matter will stay fixed"
The mass is a property that never change no matter the place, ambiental conditions, temperature and other possible factors.
The only possibility in order to change the mass is with chemical reactions or desintegration processes but that's very improbable. So for this reason this is an example of conservation.
