Mechanical layers of the earth is divided by what they are made of. True or False? Science 6th grade

What is the main reason why some developing countries fear the increase the free trade policies around the world?

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6

What energy is it when you flip on a switch on a lamp