Answer:Here are the answers to the crossword puzzle: Across: 1. mostly solid bulk of Earth's interior - mantle2. composed mainly of liquid iron and nickel - outer core3. subsystem of the Earth where life exists - biosphere4. total amount of water in a planet - hydrosphere5. outermost shell of a terrestrial planet - crust6. a rocky terrestrial planet - Earth Down: 1. protective bubble in which we live - atmosphere2. Innermost geologic layer of the Earth - inner core3. earth itself - geosphere4. Earth's interacting physical, chemical and biological processes - system I hope these answers help you solve the crossword puzzle! If you have any more questions or need further assistance, feel free to ask.
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