Problem: The properties of matter depend on the types of atoms that matter is made of. Matter can exist in two forms. It can be a pure substance. This means it is not mixed with anything. It can also be a combination of different substances. This means it can be a mix of different types of atoms. You may recall that atoms differ based on the numbers of protons they contain. Some atoms contain only one proton such as Hydrogen. Other atoms contain many protons. There are many types of atoms. For example, Helium has two protons. An Oxygen atom has eight. Water is composed of a two types of atoms. Water is made of two Hydrogen atoms and one Oxygen atoms. There are only so many types of atoms. These atoms can be mixed into an almost limitless amount of substances. So what do we call a substance that has only a single type of atom?

Question: "What are two types of atoms according to the paragraph?"

Answer: "Oxygen"
Answer: yes

Problem: Peace and Prosperity: After years of government propaganda predicting the worst atrocities, most Japanese civilians were surprised at the warmth and friendliness of the occupying forces. The postwar period began, however, with millions of displaced people homeless and starving. To counter a perceived communist threat from the Soviet Union, the US quickly set to work reconstructing the economy by transforming Japan's institutions and devising a new pacifist constitution. Article 9 renounced Japan's right to maintain armed forces, although the ambiguous wording was later taken to permit the creati on of a "self-defense" force. The zaibatsu conglomerates that had proved so instrumental in boosting Japan's militarism were disbanded, later to re-emerge as the keiretsu trading conglomerates that dominated the economy once again. The entire economy received a massive jump-start with the outbreak of the Korean War, with Japan ironically becoming the chief local supplier for an army it had battled so furiously just a few years earlier. The occupation lasted until 1952, having already planted the seeds for Japan's future stunning economic success. Economic output was back to prewar levels, and British auto companies provided the support needed to get Japan's auto industry back on its feet. Japanese companies then enthusiastically imported any Western technologies they could get their hands on. This included transistor technologyinvented in the US but then considered to have only limited applicationsfor the surreal sum of $25,000. It was Japan that produced the world's first transistor radio. The electronic technology spurt that followed is now legendary. Parliamentary democracy finally came into its own, albeit with distinctly Japanese characteristics reflecting the dislike of debate and confrontation and the group-oriented preference for maintaining the appearance of harmony at all times. The government, through the powerful Finance Ministry and Ministry of International Trade and Industry, generously supported favored private corporations: first shipping, then cars, then electronics firms basked in the warmth of the government's loving attentions. Japan overtook Britain economically in 1964. By the end of the decade, Japan's was the third largest economy in the worldless then two decades after the war had left the country in ruins. Prosperity was not without its own problems: pollution caused by "dirty" industries, a high incidence of stomach ulcers (even suicides) among schoolchildren pressured by over-ambitious parents, and the awkward questions of what to do about nuclear energy. The famous coziness among politicians, bureaucrats, and private companies, together with the strong cultural emphasis on relationship-building and a lack of transparency and accountability, eventually led to corrupt practices of endemic proportions.

Question: "What is the name of the document the US devised while occupying Japan?"

Answer: "40s"
Answer: no

Problem: Relying on an animal to come by is risky. A flower may have to wait a long time for the right animals to come by. What if one never passes close enough to the flower? Hoping the wind will blow is also risky for a plant. What if the wind does not blow? What if the blowing pollen does not land on another flower? The wind could even blow the pollen over the ocean where it is wasted. Giving free nectar is costly. It is not a good use of the plants energy. A plant uses a lot of energy to produce nectar. Some animals may just drink the nectar. They may not carry off any pollen in return. To improve their chances, plants evolved special traits. For example, they developed ways to hide their nectar. Only certain animals were able to get at the plants hidden nectar. These specific animals might be more likely to visit only flowers of the same species. This was also a benefit for some animals. Animals also evolved special traits to get to the nectar.

Question: "What do some plants provide that entices animals to visit them?"

Answer: "Hidden flowers"
Answer:
no