Ques:Answer the following question given this paragraph: The image below shows the way in which a blocked coronary artery can cause a heart attack. The loss of oxygen to the heart muscle cause that part of the tissue to die. Maybe one day, stem cell therapy will allow for the replacement of the dead cells with new cardiac muscle cells. Q: The loss of oxygen to the heart muscle causes that part of the tissue to what? Choices: - beat harder - thrive - beat erratically - die A:

Ans:die
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Ques:Answer the following question given this paragraph: As a solid is heated, its particles vibrate more rapidly as the solid absorbs kinetic energy. Eventually, the organization of the particles within the solid structure begins to break down and the solid starts to melt. The melting point is the temperature at which a solid changes into a liquid. At its melting point, the disruptive vibrations of the particles of the solid overcome the attractive forces operating within the solid. As with boiling points, the melting point of a solid is dependent on the strength of those attractive forces. Sodium chloride (NaCl) is an ionic compound that consists of a multitude of strong ionic bonds. Sodium chloride melts at 801C. Ice (solid H 2 O) is a molecular compound whose molecules are held together by hydrogen bonds. Though hydrogen bonds are the strongest of the intermolecular forces, the strength of hydrogen bonds is much less than that of ionic bonds. The melting point of ice is 0C. Q: Which bonds are the strongest of the intermolecular forces? Choices: - complex - carbon - calcium - hydrogen A:

Ans:hydrogen
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Ques:Answer the following question given this paragraph: An addition reaction is a reaction in which an atom or molecule is added to an unsaturated molecule, making a single product . An addition reaction can be thought of as adding a molecule across the double or triple bond of an alkene or alkyne. Addition reactions are useful ways to introduce a new functional group into an organic molecule. Q: What is a reaction in which an atom or molecule is added to an unsaturated molecule, making a single product? Choices: - complete reaction - homeostasis - single reaction - an addition reaction A:

Ans:an addition reaction
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Ques:Answer the following question given this paragraph: Convection in the mantle drives the movement of the plates of lithosphere over the Earth's surface. New oceanic crust forms at the ridge and pushes the older seafloor away from the ridge horizontally. Q: Convection in which part of the earth drives the movement of the plates of lithosphere over the earth's surface? Choices: - atmosphere - ocean - upper crust - mantle A:

Ans:
mantle
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