A ________ is a narrow hill of resistant rock with a flat top and very steep sides found in some deserts.
A. ridge
B. horn
C. pediment
D. plateau
E. butte
Answer: E
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Vascular or non: cell walls with lignin
What will be an ideal response?
A good heat conductor is a
A. poor insulator. B. good insulator. C. neither of these D. not enough information
Carbon sequestration ________
A) involves capturing carbon emissions and then releasing them into the stratosphere B) converts carbon from carbon dioxide emissions into smaller elements that do not contribute to global climate change C) has proved to be more dangerous to the environment than releasing carbon emissions D) involves converting carbon dioxide gas to a liquid form for storage in the ocean or underground E) has been used by U.S. electrical plants since 1955, converting carbon dioxide to limestone
What is the particular significance of valence electrons?
a. Unlike electrons in other shells, valence electrons have no charge. b. Valence electrons always balance the charge produced within the nucleus. c. The number of valence electrons is the atomic number for that element. d. Valence electrons form chemical bonds between atoms by being transferred or shared. e. The number of valence electrons defines the type of element.