Weigh a piece of paper, and then burn it until it turns into ash. Collect the produced gases and ash and weigh them. The weight of the gas and ash produced equals the weight of the original piece of paper and the weight of the oxygen consumed in the burning. Which scientific law explains this?
A. law of conservation of matter
B. first law of thermodynamics
C. second law of thermodynamics
D. theory of relativity
Answer: A
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Matching
1. On the atmospheric layers figure, choose the letter that represents the boundary in the atmosphere between the troposphere and the stratosphere. 2. On the atmospheric layers figure, choose the letter that represents the area where air would be thin and temperatures vary greatly with solar activity. 3. On the atmospheric layers figure, choose the layer that contains ozone, which keeps approximately 95% of the sun's ultraviolet radiation from reaching the Earth's surface. 4. On the atmospheric layers figure, choose the layer that represents the separation of the mesosphere and stratosphere. 5. On the atmospheric layers figure, choose the layer that represents part of the middle atmosphere in which temperatures vary greatly with altitude.
Once salt is dissolved in water the:
A. positively charged sodium cation is surrounded by the negative side of encircling water molecules. B. negatively charged sodium cation is surrounded by the negative side of encircling water molecules. C. positively charged chlorine cation is surrounded by the positive side of encircling water molecules. D. positively charged sodium cation is surrounded by the positive side of encircling water molecules.
Which of the following is FALSE regarding the tropical monsoon climate?
A) Thorn forests occur on the dry margins of this region. B) It is located along coastal areas. C) The wind direction shifts from one time of the year to the next. D) The summer (high Sun season) is the driest time of the year. E) The transition from wet to dry conditions is the result of the shifting of the ITCZ.
At divergent plate boundaries, plates are moving ____________________. At these locations, new ____________________ forms.
Fill in the blank(s) with the appropriate word(s).