Context and question: In 2001, she became the first African-American woman and second woman songwriter to win the Pop Songwriter of the Year award at the American Society of Composers, Authors, and Publishers Pop Music Awards. Beyonce was the third woman to have writing credits on three number one songs ("Irreplaceable", "Grillz" and "Check on It") in the same year, after Carole King in 1971 and Mariah Carey in 1991. She is tied with American songwriter Diane Warren at third with nine songwriting credits on number-one singles. (The latter wrote her 9/11-motivated song "I Was Here" for 4.) In May 2011, Billboard magazine listed Beyonce at number 17 on their list of the "Top 20 Hot 100 Songwriters", for having co-written eight singles that hit number one on the Billboard Hot 100 chart. She was one of only three women on that list.
What did Beyonce win in 2001, making her the first black woman to do so?
Answer: Pop Songwriter of the Year award
Context and question: Archaeology is the study of the human past through its material remains. Artifacts, faunal remains, and human altered landscapes are evidence of the cultural and material lives of past societies. Archaeologists examine these material remains in order to deduce patterns of past human behavior and cultural practices. Ethnoarchaeology is a type of archaeology that studies the practices and material remains of living human groups in order to gain a better understanding of the evidence left behind by past human groups, who are presumed to have lived in similar ways.
What do Ethnoarchaeologists gain a better understanding of by studying living human groups?
Answer: past human groups
Context and question: Natural uranium consists of three major isotopes: uranium-238 (99.28% natural abundance), uranium-235 (0.71%), and uranium-234 (0.0054%). All three are radioactive, emitting alpha particles, with the exception that all three of these isotopes have small probabilities of undergoing spontaneous fission, rather than alpha emission. There are also five other trace isotopes: uranium-239, which is formed when 238U undergoes spontaneous fission, releasing neutrons that are captured by another 238U atom; uranium-237, which is formed when 238U captures a neutron but emits two more, which then decays to neptunium-237; uranium-233, which is formed in the decay chain of that neptunium-237; and finally, uranium-236 and -240, which appear in the decay chain of primordial plutonium-244. It is also expected that thorium-232 should be able to undergo double beta decay, which would produce uranium-232, but this has not yet been observed experimentally.
What is the natural abundance of uranium-235?
Answer:
0.71%