Levels of Ecological Organization

A collection of organisms that belong to different populations but all live in the same area and interact with one another.

• Population
• Ecosystem
• Community
• Ecosphere

A collection of organisms that make up a community as well as all of the nonliving components of the environment.

• Population

• Community

• Habitat

• Ecosystem

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Nonliving factor that affects an ecosystem...

• biotic factor
• abiotic factor
• food chain 
• biome

Tags

NGSS.MS-LS2-3

Living factors or organisms that affect an ecosystem...

• abiotic factors

• species

• trophic level

• biotic factors

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-2

What are the biotic factors in this image?

• sunlight, elephants, grasses

• sunlight, water, oxygen

• elephants, autotrophs, food supply

• precipitation, heterotrophs, soil

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-2

What are the abiotic factors in this image?

• water, sunlight, dirt

• birds, plants, predators

• water, plants, parasites

• oxygen, water, grasses

An ecosystem contains living and nonliving things.

• True
• False

Tags

NGSS.MS-LS2-3

Which of the following best describes a community?

• sharks, groupers, anemones and shrimp on a coral reef
• decorator crabs on the seafloor
• loggerhead sea turtles in Atlantic
• prairie grassland in Wyoming

Tags

NGSS.MS-LS2-2

Identify all the biotic factors from the list below:

• mites in a honeybee hive

• rotting log

• flooding after a tropical storm

• black rat snakes preying on mice

• pH drop in a crater lake

Tags

NGSS.MS-LS2-4

Identify all the characteristics and examples of ecosystems from the list below:

• interacting communities and the environment

• a collection of abiotic factors ONLY

• mountain stream

• coral reef

• all the snakes in the Mojave desert

Tags

NGSS.MS-LS2-3