Page 13 - Science Course 3 (Book 1)

Mo1-L1b: What are the Abiotic and Biotic Factors of an Ecosystem?

Mo1-L1b What are the Abiotic and Biotic
Factors of an Ecosystem?
KEY CONCEPTS:
1. What are the similarities and differences between
the abiotic and biotic parts of an ecosystem? The gases in Earth’s
atmosphere include
nitrogen, oxygen, and
Vocabulary A-Z carbon dioxide.

Let us learn some vocabulary Oxygen is needed by most
organisms for cellular
respiration, carbon dioxide
Abiotic Factor is needed for plant growth
and photosynthesis, and
a nonliving thing in an ecosystem. nitrogen is needed for plants
to make proteins.

Biotic Factor
A living or once-living thing in an ecosystem.

Water is required for all the life processes that take
place inside cells, including cellular respiration,
digestion, and photosynthesis.

Resources
(Basis of Origin)

Let’s Begin Abiotic Biotic
Resources Resources

What is an ecosystem? Things composed Obtained from
of non-living biosphere and
The nonliving parts of an ecosystem are called things have life
abiotic factors and include sunlight, temperature, air,
water, and soil.
e.g rocks and e.g human beings,
Sunlight is essential for almost all life on Earth and metals flora, fauna, fisheries,
provides energy for photosynthesis and warmth. livestock, etc

Soil contains a mixture of living and nonliving things.
The biotic part of soil is humus—the decayed
remains of plants, animals, bacteria, and other
organisms.

Abiotic factors include minerals and particles of
rock, sand, and clay.

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