1 pts The chart below compares three types of rocks. The first column gives the rock classification. Which heading best describes the information provided in the second column? ??? Rock Classification Igneous melting and solidification of magma mechanical, chemical, or organic processes heat and/or pressure Sedimentary Metamorphic O Minerals in Rocks o The Time Rocks Take to Form o The Value of Rocks O Method of Rock Formation search

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?