Q: Which three colors are called the primary colors of light? Read this paragraph and choose the correct option from the provided answers: The human eye can distinguish only red, green, and blue light. These three colors are called the primary colors of light. All other colors of light can be created by combining the primary colors. Look at the Venn diagram below . Red and green light combine to form yellow light. Red and blue light combine to form magenta light, and blue and green light combine to form cyan light. Yellow, magenta, and cyan are called the secondary colors of light. Look at the center of the diagram, where all three primary colors of light combine. The result is white light. You can explore the colors of visible light and how they combine at this URL: http://www. phy. ntnu. edu. tw/oldjava/color/color_e. html. Choices: - red, blue, yellow - black, white, red - blue, green, violet - red, green, blue A:
red, green, blue

(Question)
Q: Different interatomic distances produce different lattice what? Read this paragraph and choose the correct option from the provided answers: in which C is a constant that depends on the type of crystal structure; Z+ and Z are the charges on the ions; and Ro is the interionic distance (the sum of the radii of the positive and negative ions). Thus, the lattice energy of an ionic crystal increases rapidly as the charges of the ions increase and the sizes of the ions decrease. When all other parameters are kept constant, doubling the charge of both the cation and anion quadruples the lattice energy. For example, the lattice energy of LiF (Z+ and Z = 1) is 1023 kJ/mol, whereas that of MgO (Z+ and Z = 2) is 3900 kJ/ mol (Ro is nearly the sameabout 200 pm for both compounds). Different interatomic distances produce different lattice energies. For example, we can compare the lattice energy of MgF2 (2957 kJ/mol) to that of MgI2 (2327 kJ/mol) to observe the effect on lattice energy of the smaller ionic size of F as compared to I. Choices: - qualities - surfaces - weights - energies A:
(Answer)
energies

Ques: Q: On a topographic map, what is the term for a line of equal elevation? Read this paragraph and choose the correct option from the provided answers: The topography of a region can be shown on a map. Topographic maps represent geographical features, such as hills and valleys. Topographic maps use contour lines to show geographical features. A contour line is a line of equal elevation. If you walk along a contour line, you will not go uphill or downhill. Topographic maps are also called contour maps. The rules of topographic maps are:. Choices: - latitude line - crater line - aurora line - contour line A:
Ans: contour line

(Q).
Q: During which stage of development do all the major organs begin to form? Read this paragraph and choose the correct option from the provided answers: After cells differentiate, all the major organs begin to form during the remaining weeks of embryonic development. A few of the developments that occur in the embryo during weeks 4 through 8 are listed in Figure below . As the embryo develops, it also grows in size. By the eighth week of development, the embryo is about 30 millimeters (just over 1 inch) in length. It may also have begun to move. Choices: - third trimester - nascent - transgenic - embryonic A:
(A).
embryonic

Ques:Q: What type of cells are the smallest of all human cells? Read this paragraph and choose the correct option from the provided answers: Sperm are tiny cells. In fact, they are the smallest of all human cells. They have a structure that suits them well to perform their function. Choices: - egg - dna - meristematic - sperm A:

Ans:sperm

Ques: Q: What category of elements are chacterized by their ability to reflect light, called luster, their high electrical and thermal conductivity, their high heat capacity, and their malleability and ductility? Read this paragraph and choose the correct option from the provided answers: Metallic Solids Metals are characterized by their ability to reflect light, called luster, their high electrical and thermal conductivity, their high heat capacity, and their malleability and ductility. Every lattice point in a pure metallic element is occupied by an atom of the same metal. The packing efficiency in metallic crystals tends to be high, so the resulting metallic solids are dense, with each atom having as many as 12 nearest neighbors. Bonding in metallic solids is quite different from the bonding in the other kinds of solids we have discussed. Because all the atoms are the same, there can be no ionic bonding, yet metals always contain too few electrons or valence orbitals to form covalent bonds with each of their neighbors. Instead, the valence electrons are delocalized throughout the crystal, providing a strong cohesive force that holds the metal atoms together. Choices: - halogens - nonmetals - noble gases - metals A:
Ans:
metals