Problem: OPTIONS:
- reversible change
- physical change
- carbon change
- chemical change
Q: Answer the following question given this paragraph: A chemical change occurs whenever matter changes into an entirely different substance with different chemical properties. Burning is an example of a chemical change. Q: What kind of change occurs whenever matter changes into an entirely different substance with different chemical properties? A:
Answer: chemical change

Problem:OPTIONS:
- orbital lobes
- outer orbitals
- high energy
- low-energy

Answer the following question given this paragraph: Electrons in successive atoms on the periodic table tend to fill low-energy orbitals first. Thus, many students find it confusing that, for example, the 5p orbitals fill immediately after the 4d, and immediately before the 6s. The filling order is based on observed experimental results, and has been confirmed by theoretical calculations. As the principal quantum number, n, increases, the size of the orbital increases and the electrons spend more time farther from the nucleus. Thus, the attraction to the nucleus is weaker and the energy associated with the orbital is higher (less stabilized). But this is not the only effect we have to take into account. Within each shell, as the value of l increases, the electrons are less penetrating (meaning there is less electron density found close to the nucleus), in the order s > p > d > f. Electrons that are closer to the nucleus slightly repel electrons that are farther out, offsetting the more dominant electronnucleus attractions slightly (recall that all electrons have 1 charges, but nuclei have +Z charges). This phenomenon is called shielding and will be discussed in more detail in the next section. Electrons in orbitals that experience more shielding are less stabilized and thus higher in energy. For small orbitals (1s through 3p), the increase in energy due to n is more significant than the increase due to l; however, for larger orbitals the two trends are comparable and cannot be simply predicted. We will discuss methods for remembering the observed order. The arrangement of electrons in the orbitals of an atom is called the electron configuration of the atom. We describe an electron configuration with a symbol that contains three pieces of information (Figure 6.26): 1. The number of the principal quantum shell, n, 2. The letter that designates the orbital type (the subshell, l), and 3. A superscript number that designates the number of electrons in that particular subshell. Q: What type of orbitals do electrons in successive atoms on the periodic table tend to fill first? A:
****
A: low-energy

Answer the following question given this paragraph: Skeletal muscles are attached to the skeleton and cause bones to move when they contract. Q: Which types of muscles cause bones to move when they retract? A:
OPTIONS:
- working muscles
- active muscles
- bone muscles
- skeletal muscles
skeletal muscles

Answer the following question given this paragraph: What is this strange-looking object? Can you guess what it is? It's a model of a certain type of matter. Some types of matter are elements, or pure substances that cannot be broken down into simpler substances. Many other types of matter are compounds. The model above represents a compound. The compound it represents is carbon dioxide, a gas you exhale each time you breathe. Q: Which gas do people exhale during each breath? A:
OPTIONS:
- carbon monoxide
- nitrogen
- oxygen
- carbon dioxide

Answer: carbon dioxide

Question: Answer the following question given this paragraph: Note the Pattern Few binary molecular compounds of nitrogen are formed by the direct reaction of the elements. At elevated temperatures, nitrogen reacts with highly electropositive metals to formionic nitrides, such as Li3N and Ca3N2. These compounds consist of ionic lattices formed by M n+ and N3 ions. Just as boron forms interstitial borides and carbon forms interstitial carbides, with less electropositive metals nitrogen forms a range ofinterstitial nitrides, in which nitrogen occupies holes in a close-packed metallic structure. Like the interstitial carbides and borides, these substances are typically very hard, high-melting materials that have metallic luster and conductivity. Nitrogen also reacts with semimetals at very high temperatures to produce covalent nitrides, such as Si3N4 and BN, which are solids with extended covalent network structures similar to those of graphite or diamond. Consequently, they are usually high melting and chemically inert materials. Ammonia (NH3) is one of the few thermodynamically stable binary compounds of nitrogen with a nonmetal. It is not flammable in air, but it burns in an O2 atmosphere: Equation 22.30. Q: What (nh3) is one of the few thermodynamically stable binary compounds of nitrogen with a nonmetal? A:
OPTIONS:
- liquid nitrogen
- acetic acid
- nitrous oxide
- ammonia
Answer: ammonia

input: OPTIONS:
- the tundra
- great plains
- lakes
- ocean floor Now, answer this question: Answer the following question given this paragraph: Polychaetes live on the ocean floor. They may be sedentary filter feeders, active predators, or scavengers. Active species crawl along the ocean floor in search of food. Q: Where do polychaetes live? A:
A:
output:
ocean floor