Answer the following question given this paragraph: Q: What are living echinoderms divided into five of? Choices: - classifications - species - sexes - clades A:
clades
(Question)
Answer the following question given this paragraph: Because the heat is absorbed by the system, the 177.8 kJ is written as a reactant. The heat of reaction is positive for an endothermic reaction. Q: Is the heat of reaction positive or negative for an endothermic reaction? Choices: - Neither - Both - Negative - positive A:
(Answer)
positive
Ques: Answer the following question given this paragraph: The extent to which a substance may be dissolved in water, or any solvent, is quantitatively expressed as its solubility, defined as the maximum concentration of a substance that can be achieved under specified conditions. Substances with relatively large solubilities are said to be soluble. A substance will precipitate when solution conditions are such that its concentration exceeds its solubility. Substances with relatively low solubilities are said to be insoluble, and these are the substances that readily precipitate from solution. More information on these important concepts is provided in the text chapter on solutions. For purposes of predicting the identities of solids formed by precipitation reactions, one may simply refer to patterns of solubility that have been observed for many ionic compounds (Table 4.1). Solubilities of Common Ionic Compounds in Water Soluble compounds contain group 1 metal cations (Li+, Na+, K+, Rb+, and Cs+). Q: The extent to which a substance may be dissolved in water or another solvent is known as what? Choices: - humidity - flexibility - turbidity - solubility A:
Ans: solubility
(Q).
Answer the following question given this paragraph: Fossil fuels are made from plants and animals that lived hundreds of millions of years ago. The plants and animals died. Their remains settled onto the ground and at the bottom of the sea. Layer upon layer of organic material was laid down. Eventually, the layers were buried very deeply. They experienced intense heat and pressure. Over millions of years, the organic material turned into fossil fuels. Q: Fossil fuels are made out of what two objects? Choices: - gases and animals - plants and water - soil and animals - plants and animals A:
(A).
plants and animals
Ques:Answer the following question given this paragraph: The eye of a person with myopia is longer than normal. As a result, images are focused in front of the retina ( top left ). A concave lens is used to correct myopia to help focus images on the retina ( top right ). Farsightedness, or hyperopia, occurs when objects are focused in back of the retina ( bottom left ). It is corrected with a convex lens ( bottom right ). Q: What part of a person with myopia is longer than normal? Choices: - arm - leg - neck - eye A:

Ans:eye
Ques:Answer the following question given this paragraph: Metallic character refers to the level of reactivity of a metal. Metals tend to lose electrons in chemical reactions, as indicated by their low ionization energies. Within a compound, metal atoms have relatively low attraction for electrons, as indicated by their low electronegativities. By following the trend summary in the figure below, you can see that the most reactive metals would reside in the lower left portion of the periodic table. The most reactive metal is cesium, which is not found in nature as a free element. It reacts explosively with water and will ignite spontaneously in air. Francium is below cesium in the alkali metal group, but is so rare that most of its properties have never been observed. Q: Do metals tend to gain electrons or lose electrons in chemical reactions? Choices: - develop electrons - same number of electrons - gain electrons - lose electrons A:

Ans:
lose electrons