Answer the following question given this paragraph: All matter has physical and chemical properties. Physical properties are characteristics that scientists can measure without changing the composition of the sample under study, such as mass, color, and volume (the amount of space occupied by a sample). Chemical properties describe the characteristic ability of a substance to react to form new substances; they include its flammability and susceptibility to corrosion. All samples of a pure substance have the same chemical and physical properties. For example, pure copper is always a reddish-brown solid (a physical property) and always dissolves in dilute nitric acid to produce a blue solution and a brown gas (a chemical property). Physical properties can be extensive or intensive. Extensive properties vary with the amount of the substance and include mass, weight, and volume. Intensive properties, in contrast, do not depend on the amount of the substance; they include color, melting point, boiling point, electrical conductivity, and physical state at a given temperature. For example, elemental sulfur is a yellow crystalline solid that does not conduct electricity and has a melting point of 115.2C, no matter what amount is examined (Figure 1.12 "The Difference between Extensive and Intensive Properties of Matter"). Scientists commonly measure intensive properties to determine a substance's identity, whereas extensive properties convey information about the amount of the substance in a sample. Figure 1.12 The Difference between Extensive and Intensive Properties of Matter. Q: What type of physical properties of a substance do not depend on amount? Choices: - inherent - extensive - stable - intensive A:
intensive
(Question)
Answer the following question given this paragraph: Below the topsoil is the "B" horizon. This is also called the subsoil . Soluble minerals and clays accumulate in the subsoil. Because it has less organic material, this layer is lighter brown in color than topsoil. It also holds more water due to the presence of iron and clay. There is less organic material in this layer. Q: Soluble minerals and clays accumulate in what soil layer, allowing it to hold more water? Choices: - silt - subsurface - topsoil - subsoil A:
(Answer)
subsoil
Ques: Answer the following question given this paragraph: Spinal Cord Development While the brain is developing from the anterior neural tube, the spinal cord is developing from the posterior neural tube. However, its structure does not differ from the basic layout of the neural tube. It is a long, straight cord with a small, hollow space down the center. The neural tube is defined in terms of its anterior versus posterior portions, but it also has a dorsalventral dimension. As the neural tube separates from the rest of the ectoderm, the side closest to the surface is dorsal, and the deeper side is ventral. As the spinal cord develops, the cells making up the wall of the neural tube proliferate and differentiate into the neurons and glia of the spinal cord. The dorsal tissues will be associated with sensory functions, and the ventral tissues will be associated with motor functions. Q: The spinal cord develops, cells making up the wall of the neural tube proliferate and differentiate into what? Choices: - membrane and glia - muscles and glia - jelly and glia - neurons and glia A:
Ans: neurons and glia
(Q).
Answer the following question given this paragraph: membrane are nonpolar). Some examples of these are other lipids, oxygen and carbon dioxide gases, and alcohol. However, water-soluble materialslike glucose, amino acids, and electrolytesneed some assistance to cross the membrane because they are repelled by the hydrophobic tails of the phospholipid bilayer. All substances that move through the membrane do so by one of two general methods, which are categorized based on whether or not energy is required. Passive transport is the movement of substances across the membrane without the expenditure of cellular energy. In contrast, active transport is the movement of substances across the membrane using energy from adenosine triphosphate (ATP). Q: What is the movement of substances across the membrane without the expenditure of cellular energy called? Choices: - inner cell transport - immune transport - active transport - passive transport A:
(A).
passive transport
Ques:Answer the following question given this paragraph: Q: What is the capacity to cause change? Choices: - gravity - temperature - mass - energy A:

Ans:energy
Answer the following question given this paragraph: The skeletal system protects the soft organs of the body. For example, the skull surrounds and protects the brain. The ribs protect the heart and lungs. Q: What system protects the soft organs of the body? Choices: - nervous system - digestive system - Cardiovascular system - skeletal system A:
skeletal system