8/20/25 CFA Unit 1-13.1 Biotic and Abiotic Factors in Ecosystems

What does the term "biotic" refer to in an ecosystem?

• Non-living parts of the environment

• Living parts of the environment

• Only plants in the environment

• Only rocks and soil

Which of the following is an example of a biotic factor in a forest?

• Soil

• Sunlight

• Trees

• Rain

Tags

NGSS.MS-LS2-4

How are biotic and abiotic factors related in an ecosystem?

• They do not affect each other

• Biotic factors depend on abiotic factors to survive

• Abiotic factors depend on biotic factors to survive

• They are always found in different places

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-5

What could happen in a desert if temperatures rise and there is even less water?

• More plants will grow

• Biotic factors may die or move away

• Abiotic factors will become biotic

• The desert will turn into a forest

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Why is it important to study both biotic and abiotic parts of an ecosystem?

• Only abiotic parts matter

• Only biotic parts matter

• Both parts help us understand how ecosystems work

• They are always the same

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-5

Match each item with whether it is biotic or abiotic.

• Abiotic factor: Sand

• Fungi

• Biotic factor: Bugs

• Bacteria

• Biotic factor: Bacteria

• Sand

• Biotic factor: Fungi

• Bugs

Why do scientists need to look closely at things like soil and water?

• To find gold

• To separate living and nonliving things

• To measure temperature

• To count the number of rocks

Tags

NGSS.MS-LS2-3

NGSS.MS-ESS2-4

(a)   is a biotic factor found in soil.

• Minerals
• Sand
• Bacteria
• Water

Tags

NGSS.MS-LS1-5

What is an example of a nonliving part of an ecosystem?

• Fungi

• Bugs

• Minerals

• Plants

Tags

NGSS.MS-LS2-3

What is the main difference between biotic and abiotic factors?

• Biotic factors are always bigger

• Abiotic factors are always smaller

• Biotic factors are living, abiotic factors are nonliving

• Abiotic factors are only found in water