Biotic Factors of Ecology - 7th grade

Humus is part of the soil within an ecosystem. Worms often act as decomposers within that ecosystem. Decomposition is the worm's ___ in the ecosystem.

• niche
• habitat
• biome
• ecosystem

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-3

Kudzu takes over almost any area in which it germinates. Kudzu is considered to be a(n) __.

• invasive species
• predator
• native species
• prey

Tags

NGSS.HS-LS2-6

NGSS.HS-LS4-5

Levels of ecological organization in order from largest to smallest would be _____.

• species, population, community, ecosystem, biome
• biome, ecosystem, community, population, species
• biome, ecosystem, population, community, species
• population, species, community, biome

The picture below shows a ____.

• population
• community
• ecosystem
• biome

The graph illustrates what has happened over an 8 year period, when non-native Nile perch were introduced to Lake Malawi in Africa. Based on the data, what recommendation would you make to African biologists? 

• There is not enought information on the graph
• Reduce both fish populations, or they will starve one another out.
• Remove the pike cichlids, as they are competing with the Nile perch.
• Remove or reduce the Nile Perch as quickly as possible, as it is out competing the Pike Cichlid

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

The picture below shows ____.

• an ecosystem
• a community
• a species
• a biome

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-3

A wolf changes his predation patterns in the winter and stops eating his normal prey, deer,  by preying on salmon in a nearby stream. What is a reason why the wolf would ignore the deer and eat salmon in this situation?

• The deer population has increased due to over abundance of producers for them to eat.
• The deer population has migrated tot he south and are not availale for the wolves any longer.
• Wolves get tired of being injured by the hooves of deer during predation.
• Salmon mate in the spring in streams in the ZNortheast, so ther is an abundance of salmon in the area.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

How would this ecosystem most likely be affected if the eagle was removed from the area?

• There would be a decrease in the number of butterflies.
• There would be no change, because it is a food web, not chain.
• The number of snakes would decrease drastically.
• The number of butterflies would grow out of control.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-2

Which statement about this energy pyramid is correct?

• Energy is not transferred from one level to the next level in the pyramid.
• All of the energy is only at the bottom of the pyramid.
• Energy is transferred, and the bottom level of the pyramid has the most energy.
• Most of the energy is at the top of the pyramid.

Tags

NGSS.MS-LS2-3

The colors in the map below would most likely be used to identify ___.

• the biomes around the world
• the communities around the world
• the species around the world
• the populations around the world