Answer the following question given this paragraph: Fossil fuels are compounds of carbon and hydrogen, called hydrocarbons . Hydrocarbons can be solid, liquid, or gas. The solid form is coal. The liquid form is petroleum, or crude oil. The gaseous form is natural gas. Q: What do we call the solid form of hydrocarbons? Choices: - methane - shale - bauxite - coal A:
coal
(Question)
Answer the following question given this paragraph: Rutherford's nuclear model of the atom helped explain why atoms of different elements exhibit different chemical behavior. The identity of an element is defined by itsatomic number (Z), the number of protons in the nucleus of an atom of the element. The atomic number is therefore different for each element. The known elements are arranged in order of increasing Z in the periodic table (Figure 1.24 "The Periodic Table Showing the Elements in Order of Increasing "; also see Chapter 32 "Appendix H: Periodic Table of Elements"),. Q: Elements are defined by their atomic number, a number that describes the amount of what in the element? Choices: - bonds - electrons - neutrons - protons A:
(Answer)
protons
Ques: Answer the following question given this paragraph: Blood flows in only one direction in the heart. Blood enters the atria, which contract and push blood into the ventricles. The atria relax and the ventricles fill with blood. Finally, the ventricles contract and push blood around the body. Q: Blood enters the heart in what valve? Choices: - tricuspid - aortic - mitral - atria A:
Ans: atria
(Q).
Answer the following question given this paragraph: energy is released when particles in the nucleus of the atom are rearranged. (e) Chemical energy results from the particular arrangement of atoms in a chemical compound; the heat and light produced in this reaction are due to energy released during the breaking and reforming of chemical bonds. Electrical energy, nuclear energy, and chemical energy are different forms ofpotential energy (PE), which is energy stored in an object because of the relative positions or orientations of its components. A brick lying on the windowsill of a 10th-floor office has a great deal of potential energy, but until its position changes by falling, the energy is contained. In contrast, kinetic energy (KE) is energy due to the motionof an object. When the brick falls, its potential energy is transformed to kinetic energy, which is then transferred to the object on the ground that it strikes. Q: Chemical energy results from the particular arrangement of atoms in a chemical compound; the heat and light produced in this reaction are due to energy released during the breaking and reforming of what? Choices: - acid bonds - atom bonds - carbon bonds - chemical bonds A:
(A).
chemical bonds
Ques:Answer the following question given this paragraph: Rainwater absorbs carbon dioxide (CO 2 ) as it falls. The CO 2 combines with water to form carbonic acid. The slightly acidic water is especially good at dissolving the rock limestone. Groundwater creates landforms by dissolving away rock. Q: Rainwater absorbs carbon dioxide (co 2 ) as it falls. the co 2 combines with water to form what? Choices: - carbon monoxide - nitrate acid - methane gas - carbonic acid A:

Ans:carbonic acid
Ques: Answer the following question given this paragraph: 17.4 The Thyroid Gland The thyroid gland is a butterfly-shaped organ located in the neck anterior to the trachea. Its hormones regulate basal metabolism, oxygen use, nutrient metabolism, the production of ATP, and calcium homeostasis. They also contribute to protein synthesis and the normal growth and development of body tissues, including maturation of the nervous system, and they increase the body's sensitivity to catecholamines. The thyroid hormones triiodothyronine (T3) and thyroxine (T4) are produced and secreted by the thyroid gland in response to thyroid-stimulating hormone (TSH) from the anterior pituitary. Synthesis of the amino acidderived T3 and T4 hormones requires iodine. Insufficient amounts of iodine in the diet can lead to goiter, cretinism, and many other disorders. Q: What gland is a butterfly-shaped organ located in the neck anterior to the trachea? Choices: - pituitary gland - pineal gland - adrenal gland - thyroid gland A:
Ans:
thyroid gland