The natural gas that you burn in a stove or furnace is composed primarily of methane, a molecule with one carbon atom (C), and four hydrogen atoms (H). What is the chemical formula of methane?
Plants manufacture glucose for food. If the chemical formula for glucose is C6H12O6, how many atoms are in a molecule of glucose?
A molecule is composed of atoms that all pull on electrons with the same strength. Will this molecule be nonpolar?
Carbon disulfide will not dissolve in water. Is it made of ionic molecules, polar molecules, or nonpolar molecules?
What is responsible for the fact that, unlike virtually any other substance in the world, solid water (ice) is lighter than an equal volume of liquid water?
If a substance does not dissolve in water, it most likely _______________.
Is hard water the result of a city’s water treatment process?
If a substance dissolves in water, will it dissolve in vegetable oil, a nonpolar substance?
An important component of gasoline is octane, which is composed of molecules that have eight carbon atoms (C) and eighteen hydrogen atoms (H). What is the chemical formula of octane?
A sample of water is taken randomly from earth’s hydrosphere. What kind of water (freshwater or saltwater) is it most likely to be?
What is the largest source of liquid freshwater on the planet?
If a lake has no means of getting rid of water except evaporation, which does it contain?
If no energy is added to air, what happens to the temperature when the air expands?
_____27. What do the salinity levels of the oceans tell us about the age of the earth?
What have scientists observed in order to learn about earth’s interior?
What causes the earth’s magnetic field?
What two theories attempt to explain the earth’s magnetic field?
Which theory is the most scientifically valid?
If a region of the earth has a lot of volcanic activity, what two kinds of mountains do you expect to find there? A. Folded and Domed B. Volcanic and Domed C. Domed and Folded D. Fault Block and Volcanic
What is Pangaea?
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