Page 47 - Curriculum Visions Dynamic Book

For more on oxygen, see Volume 12: Oxygen in the Elements set.
all of the oxygen in the atmosphere
is from plants (the process is called photosynthesis). Some uncombined oxygen dissolves in water, providing the oxygen needed for marine animals.
 Oxygen being produced by aquatic plants.
 When a glowing splint is introduced to a test tube containing oxygen, it will relight within a few seconds.
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