What holds a circularly-moving satellite in orbit while the force of gravity pulls downward toward Earth?
A. An equal and opposite force to that of gravity.
B. Nothing but having a sufficient tangential velocity.
C. Pulls of the Moon, Sun, and other celestial bodies.
D. all of the above
Answer: B
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The "D" in DNA stands for which of the following?
A) b-2-deoxy-D-ribose B) b-2-deoxy-L-ribose C) b-3-deoxy-D-ribose D) b-3-deoxy-L-ribose
Which of the following is an example of a specialization that plants in the desert may have?
A. Salt tolerance B. Storing water in stems or roots C. Reducing water loss with thick epidermal layers D. All of these are adaptations of plants living in desert conditions
The United States imports nearly all of the following minerals:
Check all that apply. a. graphite b. feldspar c. manganese d. quartz e. strontium
Metals are good conductors of electricity because their protons can roam freely throughout the material
Indicate whether the statement is true or false