Which layers are impermeable ? layer of loose soil

layer of sand

layer of gravel

layer of hard clay

solid rock
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This is the process of making a prediction based on the results of prior observations of similar events.

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit

Which process involves glucose reacting with oxygen to produce energy, carbon dioxide, and water? a. photosynthesis b. atp production c. glycolysis d. cellular respiration