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Why is the biosphere so crucial to our well-being, and how do we modify it? (a) GapFill
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Nutrients are such ingredients as nitrogen and
. All plant and animal life needs
. They pass within the
and change their
. Rainwater
nutrients out of the atmosphere into the soil. Weathered rock releases nutrients into the
. Volcanic rock releases nutrients from the
into the
and soil. Plants and animals
the nutrients. When they die, the dead material is broken down by
. The nutrients then
to the soil, making them available again for other plants and animals to use. This is called the nutrient
.