Answer:
1. The Earth
consists of four
subsystems,
across whose
boundaries
matter and
energy flows,
the atmosphere
(air), biosphere
(living things),
hydrosphere
water), and
geosphere
(land). The
atmosphere
provides the
geosphere with
heat and energy
needed tor rock
breakdown and
erosion. The
biosphere
receives gases,
heat, and
sunlight
(energy from
the atmosphere. It
receives water
from thee
hydrosphere
and a living
medium from
the geosphere
Explanation:
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