Answer the following question given this paragraph: Minerals are chemical elements that don't come from living things or include the element carbon. Many minerals are needed in the diet for normal functioning of the body. Several minerals that are needed in relatively large amounts are listed in Table below . As you can see from these examples, minerals have a diversity of important functions. Your body can't produce any of the minerals it needs, so you must get them from the food you eat. The table shows good food sources of the minerals. Q: What is the name for elements that neither contain carbon nor come from living things? Choices: - acids - contaminants - pigments - minerals A:
minerals
Answer the following question given this paragraph: Crystallization separates mixtures based on differences in solubility, a measure of how much solid substance remains dissolved in a given amount of a specified liquid. Most substances are more soluble at higher temperatures, so a mixture of two or more substances can be dissolved at an elevated temperature and then allowed to cool slowly. Alternatively, the liquid, called the solvent, may be allowed to evaporate. In either case, the least soluble of the dissolved substances, the one that is least likely to remain in solution, usually forms crystals first, and these crystals can be removed from the remaining solution by filtration. Figure 1.9 "The Crystallization of Sodium Acetate from a Concentrated Solution of Sodium Acetate in Water" dramatically illustrates the process of crystallization. Most mixtures can be separated into pure substances, which may be either elements or compounds. An element, such as gray, metallic sodium, is a substance that cannot be broken down into simpler ones by chemical changes; a compound, such as white, crystalline sodium chloride, contains two or more elements and has chemical and physical properties that are usually different from those of the elements of which it is composed. With only a few exceptions, a particular compound has the same elemental composition (the same elements in the same proportions) regardless of its source or history. The chemical composition of a substance is altered in a process called achemical change. The conversion of two or more elements, such as sodium and chlorine, to a chemical compound, sodium chloride, is an example of a chemical change, often called a chemical reaction. Currently, about 115 elements are known, but millions of chemical compounds have been prepared from these 115 elements. The known elements are listed in the periodic table (see Chapter 32 "Appendix H: Periodic Table of Elements"). In general, a reverse chemical process breaks down compounds into their elements. For example, water (a compound) can be decomposed into hydrogen and... Q: Crystallization separates mixtures based on differences in what, which usually increases with temperature? Choices: - density - viscosity - humidity - solubility A:
solubility
Q: Answer the following question given this paragraph: Measuring devices must be used correctly to get accurate measurements. Figure below shows the correct way to use a graduated cylinder to measure the volume of a liquid. Q: In a science lab, what device would you use to measure the volume of a liquid? Choices: - anemometer - Richter scale - yardstick - graduated cylinder A:
A: graduated cylinder
Question: Answer the following question given this paragraph: The Celsius scale is the standard SI temperature scale. It is equal to the Kelvin scale if you minus 273 from the Celsius reading. Water has a boiling point of and a freezing point of . Q: What temperature scale is obtained by adding 273 degrees from the corresponding celsius temperature? Choices: - whittle scale - seismic scale - ph scale - kelvin scale A:
Answer: kelvin scale
*Question*
Answer the following question given this paragraph: Levels of Organization of Living Things Living things are highly organized and structured, following a hierarchy that can be examined on a scale from small to large. The atom is the smallest and most fundamental unit of matter. It consists of a nucleus surrounded by electrons. Atoms form molecules. A molecule is a chemical structure consisting of at least two atoms held together by one or more chemical bonds. Many molecules that are biologically important are macromolecules, large molecules that are typically formed by polymerization (a polymer is a large molecule that is made by combining smaller units called monomers, which are simpler than macromolecules). An example of a macromolecule is deoxyribonucleic acid (DNA) (Figure 1.15), which contains the instructions for the structure and functioning of all living organisms. Q: What is the smallest and most fundamental unit of matter, consisting of a nucleus surrounded by electrons? Choices: - proton - molecule - neutron - atom A:
**Answer**
atom
(Question)
Answer the following question given this paragraph: Q: What term refers to the sequence of community and ecosystem changes after a disturbance? Choices: - progressions - disturbance succession - physiological succession - ecological succession A:
(Answer)
ecological succession