What evidence is there to suggest that the earth is composed of tectonic plates?

question 3 options:

the presence of a ring of “fire, hot spots, and the locations of earthquakes are some kinds of evidence that indicate plates exist and move. data from seafloor spreading is another kind of data. the presence of fossils indicates that two land masses that once were close are now far apart. mountain ranges that once were part of the same range are now on different continents. all of these indicates plates exist and move.

the tectonic plates are cracked up due to the frequency of earthquakes and scientists can see and measure these cracks. the cracks are the proof that the earth is made up of tectonic plates.

Amines are good nucleophiles, even though they are neutral molecules. how would the rate of an sn2 reaction between an amine and an alkyl halide be affected if the polarity of the solvent is increased? amines are good nucleophiles, even though they are neutral molecules. how would the rate of an reaction between an amine and an alkyl halide be affected if the polarity of the solvent is increased? because both reactants in the rate-limiting step are neutral, the reaction will be faster if the polarity of the solvent is increased. because both reactants in the rate-limiting step are neutral, the reaction will be slower if the polarity of the solvent is increased. because both reactants in the rate-limiting step are neutral, the reaction will occur at the same rate if the polarity of the solvent is increased. request answer

What can be done to make a solid solute dissolve faster in a liquid solvent?

Select the correct answer. why are scientific models important in the study of science? a. they always involve critical mathematical calculations. b. they scientists understand complex ideas and objects that aren’t easy to handle. c. they enable scientists to popularize their work in society. d. they are required when conducting any peer review process. e. they are necessary for turning a hypothesis into a law.