Answer the following question given this paragraph: Nuclear fission is the splitting of the nucleus of an atom into two smaller nuclei. This type of reaction releases a great deal of energy from a very small amount of matter. It begins when the nucleus of a radioactive atom gains a neutron. Q: What term describes the splitting of the nucleus of an atom into two smaller nuclei? Choices: - nuclean fusion - atomic reaction - critical fission - nuclear fission A:
nuclear fission
(Question)
Answer the following question given this paragraph: Absorption of Light Light energy enters the process of photosynthesis when pigments absorb the light. In plants, pigment molecules absorb only visible light for photosynthesis. The visible light seen by humans as white light actually exists in a rainbow of colors. Certain objects, such as a prism or a drop of water, disperse white light to reveal these colors to the human eye. The visible light portion of the electromagnetic spectrum is perceived by the human eye as a rainbow of colors, with violet and blue having shorter wavelengths and, therefore, higher energy. At the other end of the spectrum toward red, the wavelengths are longer and have lower energy. Q: In plants, pigment molecules absorb only visible light for photosynthesis. the visible light seen by humans as white light actually exists in a what? Choices: - vacuum - transparency - invisible spectrum - rainbow of colors A:
(Answer)
rainbow of colors
Ques: Answer the following question given this paragraph: Ionic compounds are compounds in which positive metal ions and negative nonmetal ions are joined by ionic bonds. In these compounds, the chemical symbol for the positive metal ion is written first, followed by the symbol for the negative nonmetal ion. The video at the following URL gives a fuller explanation of ionic compounds and their formulas: http://www. youtube. com/watch?v=vscoYh6m46M . Q: The chemical symbol of which ion is written first in ionic compounds? Choices: - negative ion - good metal ion - last ion - positive metal ion A:
Ans: positive metal ion
(Q).
Answer the following question given this paragraph: Most circuits have devices such as light bulbs that convert electrical energy to other forms of energy. In the case of a light bulb, electrical energy is converted to light and thermal energy. Q: A light bulb converts electrical energy to light and what? Choices: - kinetic energy - chemical energy - visible energy - thermal energy A:
(A).
thermal energy
Ques:Answer the following question given this paragraph: Carbon is a nonmetal in group 14 of the periodic table. Like other group 14 compounds, carbon has four valence electrons. Valence electrons are the electrons in the outer energy level of an atom that are involved in chemical bonds. The valence electrons of carbon are shown in Figure below . Q: What type of electrons does carbon have? Choices: - shell - ionic - gradient - valence A:

Ans:valence
Answer the following question given this paragraph: Many common electric devices contain electromagnets. Some examples include hair dryers, fans, CD players, telephones, and doorbells. Most electric devices that have moving parts contain electric motors. You can read below how doorbells and electric motors use electromagnets. Q: What type of motor is used in most household devices with moving parts? Choices: - cooling motors - vacuum motors - thermal motors - electric motors A:
electric motors