Answer the following question given this paragraph: The peripheral nervous system consists of all the nervous tissue that lies outside the central nervous system. It is connected to the central nervous system by nerves. It has several divisions and subdivisions that transmit nerve impulses between the central nervous system and the rest of the body. Q: Which system consists of all the nervous tissue that lies outside the central nervous system? Choices: - auxiliary nervous system - spinal cord - cerebral cortex - peripheral nervous system A:
peripheral nervous system
(Question)
Answer the following question given this paragraph: Scientists think the solar system formed from a big cloud of gas and dust, called a nebula . This is the solar nebula hypothesis. The nebula was made mostly of hydrogen and helium. There were heavier elements too. Gravity caused the nebula to contract ( Figure below ). Q: Scientists think the solar system formed from a big cloud of gas and dust called what? Choices: - comet - supernova - Oort cloud - nebula A:
(Answer)
nebula
Ques: Answer the following question given this paragraph: Near-Earth asteroids have orbits that cross Earth's orbit. This means that they can collide with Earth. There are over 4,500 known near-Earth asteroids. Small asteroids do sometimes collide with Earth. An asteroid about 510 m in diameter hits about once per year. Five hundred to a thousand of the known near-Earth asteroids are much bigger. They are over 1 kilometer in diameter. When large asteroids hit Earth in the past, many organisms died. At times, many species became extinct. Astronomers keep looking for near-Earth asteroids. They hope to predict a possible collision early so they can to try to stop it. Q: In the past, what colliding with planet earth has caused many organisms to die off? Choices: - acid rain - meteorites - the Sun - asteroids A:
Ans: asteroids
(Q).
Answer the following question given this paragraph: actinide: The actinides are the 14 elements from thorium (atomic number 90) to lawrencium (atomic number 103). The sublevel is in the process of being filled. The actinides are all radioactive elements and only the first four have been found naturally on Earth. Q: The actinides are all what type of elements? Choices: - large - nuclear - multiple - radioactive A:
(A).
radioactive
Ques:Answer the following question given this paragraph: Molecular orbital theory describes the distribution of electrons in molecules in much the same way that the distribution of electrons in atoms is described using atomic orbitals. Using quantum mechanics, the behavior of an electron in a molecule is still described by a wave function, , analogous to the behavior in an atom. Just like electrons around isolated atoms, electrons around atoms in molecules are limited to discrete (quantized) energies. The region of space in which a valence electron in a molecule is likely to be found is called a molecular orbital (2). Like an atomic orbital, a molecular orbital is full when it contains two electrons with opposite spin. We will consider the molecular orbitals in molecules composed of two identical atoms (H2 or Cl2, for example). Such molecules are called homonuclear diatomic molecules. In these diatomic molecules, several types of molecular orbitals occur. The mathematical process of combining atomic orbitals to generate molecular orbitals is called the linear combination of atomic orbitals (LCAO). The wave function describes the wavelike properties of an electron. Molecular orbitals are combinations of atomic orbital wave functions. Combining waves can lead to constructive interference, in which peaks line up with peaks, or destructive interference, in which peaks line up with troughs. Q: Which theory describes the distribution of electrons in molecules in much the same way that the distribution of electrons in atoms is described using atomic orbitals? Choices: - molecular distribution theory - atomic orbital theory - atomic distribution theory - molecular orbital theory A:

Ans:molecular orbital theory
Ques: Answer the following question given this paragraph: Annelids called polychaete worms live on the ocean floor. They may be filter feeders, predators, or scavengers. The amazing feather duster worm in Figure below is a polychaete that has a fan-like crown of tentacles for filter feeding. Q: Where do polychaete worms live? Choices: - in tide pools - attached to marine life - in coral reefs - the ocean floor A:
Ans:
the ocean floor