Stars are made of very hot gas. This gas is mostly hydrogen and helium, which are the two lightest elements. Stars shine by burning hydrogen into helium in their cores, and later in their lives create heavier elements.
Answer:
Katherine's opportunity cost is the cost of getting to the lecture event itself plus the reduction in her physics exam grade by not studying tonight. True
Explanation:
Opportunity cost is the cost of foregoing a benefit or incurring loss due to opting an alternative which is next beneficial . Here Katherine is losing in terms of grades in her exam to take the benefit of listening to the lecture , So loss to her grade is the opportunity cost of attending to the lecture and getting benefited.
B While later cultures lived in settled, permanent villages, the Paleo Indians lived a nomadic lifestyle.
I took the test
During presentations, speakers show their prowess by knowing the content well.
I think this word best fits the sentence. Prowess is about an ability of the person and based on the sentence the speakers try to prove something about understanding the content.
Gupta Empire was an ancient Indian empire existing from the mid-to-late 3rd century CE to 590 CE. At its zenith, from approximately 319 to 550 CE, it covered much of the Indian subcontinent.[2] This period is called the Golden Age of India by some historians,[3] although this characterization has been disputed by others.[4] The ruling dynasty of the empire was founded by the king Sri Gupta; the most notable rulers of the dynasty were Chandragupta I, Samudragupta, and Chandragupta II. The 5th-century CE Sanskrit poet Kalidasa credits the Guptas with having conquered about twenty-one kingdoms, both in and outside India, including the kingdoms of Parasikas, the Hunas, the Kambojas, tribes located in the west and east Oxus valleys, the Kinnaras, Kiratas, and others
