Q: What astronomical phenomenon is often comprised of remnants of the earliest material that formed in the solar system? Read this paragraph and choose the correct option from the provided answers: Many meteorites are remnants of the earliest material that formed in the solar system. Choices: - asteroids - particles - comets - meteorites A:
meteorites

Q: When an electron transitions from an excited state to a less excited state, or ground state, the difference in energy is emitted as a what? Read this paragraph and choose the correct option from the provided answers: which is identical to the Rydberg equation for R = k . When Bohr calculated his theoretical value for the hc Rydberg constant, R , and compared it with the experimentally accepted value, he got excellent agreement. Since the Rydberg constant was one of the most precisely measured constants at that time, this level of agreement was astonishing and meant that Bohr's model was taken seriously, despite the many assumptions that Bohr needed to derive it. The lowest few energy levels are shown in Figure 6.14. One of the fundamental laws of physics is that matter is most stable with the lowest possible energy. Thus, the electron in a hydrogen atom usually moves in the n = 1 orbit, the orbit in which it has the lowest energy. When the electron is in this lowest energy orbit, the atom is said to be in its ground electronic state (or simply ground state). If the atom receives energy from an outside source, it is possible for the electron to move to an orbit with a higher n value and the atom is now in an excited electronic state (or simply an excited state) with a higher energy. When an electron transitions from an excited state (higher energy orbit) to a less excited state, or ground state, the difference in energy is emitted as a photon. Similarly, if a photon is absorbed by an atom, the energy of the photon moves an electron from a lower energy orbit up to a more excited one. We can relate the energy of electrons in atoms to what we learned previously about energy. The law of conservation of energy says that we can neither create nor destroy energy. Thus, if a certain amount of external energy is required to excite an electron from one energy level to another, that same amount of energy will be liberated when the electron returns to its initial state (Figure 6.15). In effect, an atom can "store" energy by using it to promote an electron to a state with a higher energy and release it when the electron returns to a lower state. The energy can be released as one quantum of energy, as the electron returns to its... Choices: - neutron - nucleus - quark - photon A:
photon

Q: Q: What event occurs between the two solstices? Read this paragraph and choose the correct option from the provided answers: Equinox comes halfway between the two solstices. At equinoxes, the Sun's rays shine most directly at the Equator ( Figure below ). The daylight and nighttime hours are exactly equal on an equinox. The autumnal, or fall, equinox happens on September 22 or 23. The vernal, or spring, equinox happens March 21 or 22 in the Northern Hemisphere. Choices: - Christmas - summer - Leap Year - equinox A:
A: equinox

Question: Q: What is formed when an acidic solution and a basic solution react together in a neutralization reaction? Read this paragraph and choose the correct option from the provided answers: An acidic solution and a basic solution react together in a neutralization reaction that also forms a salt. Choices: - Sodium - seawater - shallow - salt A:
Answer: salt

*Question*
Q: Who discovered that the andromeda nebula is over 2 million light years away Read this paragraph and choose the correct option from the provided answers: The universe contains all the matter and energy that exists and all of space and time. We are always learning more about the universe. In the early 20th century, Edwin Hubble used powerful telescopes to show that some distant specks of light seen through telescopes are actually other galaxies. ( Figure below ) Hubble discovered that the Andromeda Nebula is over 2 million light years away. This is many times farther than the farthest distances we had measured before. He realized that galaxies were collections of millions or billions of stars. Hubble also measured the distances to hundreds of galaxies. Today, we know that the universe contains about a hundred billion galaxies. Choices: - richter hubble - smith hubble - mills hubble - edwin hubble A:
**Answer**
edwin hubble

*Question*
Q: What group of animals are the largest arthropods? Read this paragraph and choose the correct option from the provided answers: There are several traits shared by all arthropods. Arthropods have a complete digestive system. They also have a circulatory system and a nervous system. In addition, they have special organs for breathing and excreting wastes. Other traits of arthropods include:. Choices: - birds - fish - spiders - insects A:
**Answer**
insects