When warm and cold air masses collide, the warm air is forced upward. Why does this occur?
What will be an ideal response?
Answers may vary.
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What is the predominant technique used to extract minerals?
A. surface mining B. underground mining C. aerial mining D. in-situ injection
Evaluate whether gender inequality is a barrier to development
What will be an ideal response?
Kirchhoff's law
A) only applies to blackbodies. B) gives the wavelength of maximum energy emission. C) states that the rate of energy emission from an object is proportional to the fourth power of its temperature. D) applies to the Sun, but not the Earth. E) holds that an object that absorbs certain wavelengths well will also be a good emitter of those wavelengths.
Which of the following is true of a voltaic cell?
A) The anode is the negative electrode and place where reduction occurs. B) The anode is the negative electrode and place where oxidation occurs. C) The cathode is the negative electrode and place where reduction occurs. D) The cathode is the negative electrode and place where reduction occurs.