When the frequency of light matches the natural frequency of molecules in a material, light is
A) absorbed.
B) transmitted.
C) reflected.
D) none of the above
A
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Why is the ocean salty?
A. Material from volcanos. B. Material from hydrothermal vents. C. Material from rivers. D. All of the above. E. None of the above.
Which of the following statements regarding nuclear energy is true?
A. Nearly all nuclear power plants worldwide are built far from water sources to prevent contamination. B. In a nuclear power plant, electricity is collected directly from electrons splitting off from fuel atoms. C. In a nuclear power plant, electricity is collected directly from the combination of electrons. D. The Pressurized Water Reactor and the Boiling Water Reactor are essentially the two main designs for a nuclear power plant. E. Decommissioning a nuclear power plant costs up to ten times as much as building it.
Using the letters associated with the diagrams above, diagram ___ illustrates regional metamorphism
a. A b. B c. C
In the early 1990s, the Clean Water Act was reauthorized and strengthened to include important new wetlands-protection measures.
Answer the following statement true (T) or false (F)