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All living and nonliving things in an area make up an ___.
Ecosystem
The living things in an ecosystem are the ___ factors.
Biotic
Sunlight and temperature are examples of nonliving factors, or ___ factors, in an ecosystem.
Abiotic
Biotic and abiotic factors in an ecosystem ___ on each other. If one factor in an ecosystem is disturbed, other parts of the ecosystem are affected.
Depend
Almost all energy on Earth originally came from the ___.
Sun
Sunlight is used by plants to make ___.
Food
True or False: Two abiotic factors affected by sunlight are temperature and climate.
True
If you describe the average weather conditions of an area over time, you describe the area’s ___.
Climate
Wind, temperature, and moisture influence the daily ___.
Weather conditions
___ is how warm or cold something is.
Temperature
Most organisms are made mostly of ___.
Water
Organisms need water to ___ and ____.
grow and reproduce
___ must contain water to support life.
Ecosystems
The layers of gases that surround Earth make up the ___.
Atmosphere
Earth’s atmosphere is mainly ___ and ___
Nitrogen and Oxygen
Earth’s ___ protects organisms from harmful rays from the Sun.
Atmosphere
