(Question)
Answer the following question given this paragraph: Of course. But what type? Of the nine classes of vertebrates, five are fish. Each of the five classes has distinguishing characteristics that allow members to be classified appropriately. Stingray are cartilaginous fish, related to sharks. Q: Of the nine classes of vertebrates, how many are fish? Choices: - one - four - three - five A:
(Answer)
five

(Question)
Answer the following question given this paragraph: The girl pictured above became negatively charged because electrons flowed from the van de Graaff generator to her. Whenever electrons are transferred between objects, neutral matter becomes charged. This occurs even with individual atoms. Atoms are neutral in electric charge because they have the same number of negative electrons as positive protons. However, if atoms lose or gain electrons, they become charged particles called ions. You can see how this happens in the Figure below . When an atom loses electrons, it becomes a positively charged ion, or cation. When an atom gains electrons, it becomes a negative charged ion, or anion. Q: Gain or loss of what causes an atom to become a negatively or positively charged ion? Choices: - protons - neutrons - nucleus - electrons A:
(Answer)
electrons

(Question)
Answer the following question given this paragraph: An atomic orbital is a region of space around an atom that has a non-zero probability for an electron with a particular energy. Analogously, a molecular orbital is a region of space in a molecule that has a non-zero probability for an electron with a particular energy. Both an atomic orbital and a molecular orbital can contain two electrons. Q: What term describes a region of space around an atom that has a non-zero probability for an electron with a particular energy? Choices: - orbital lobe - minimal orbital - related orbital - atomic orbital A:
(Answer)
atomic orbital