Most of the world’s energy supply comes from burning fossil fuels. fossil fuels are nonrenewable resources. if people continue to burn fossil fuels at the same rate, which of the following events will most likely happen? a. all of the world’s fossil fuel reserves will be used up. b. fossil fuels will quickly reform underneath the ocean’s floor. c. no changes will be made to the world’s fossil fuel reserves. d. fossil fuel deposits will be found on the moon.

The “death throes” of stars are amongst the most complex phenomena in all of astronomy, and the “corpses” of stars amongst the most energetic and exotic objects in existence. beginning at the end of the core helium fusion stage in a star’s life, describe in detail the post-main sequence development of both (a) a 1.0 solar mass star, and (b) a 25.0 solar mass star. in what significant ways do they differ? what role does each of these types of stars play in the "star-gas-star" cycle and the evolution of chemical elements in our galaxy?

*drag each tile to the correct location in the sequence* the table shows chronological events in the life of our sun, a medium-sized star. place the missing events into the correct rows of the table.

What is the relationship between the direction of motion of the balloon and the wind currents