Ecosystems and Environments

Which of the following contributes most to promoting sustainability in an ecosystem?

• Lack of decomposers

• A balance water table

• Variety of organisms

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NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-5

Ecological succession usually includes changes in all of the following EXCEPT -

• the number of different kinds of plants

• the number of plants of any one species

• the rate at which species produce offspring

Tags

NGSS.MS-LS2-4

in the process of ecological succession, grassess, appear before shrubs because grasses-

• loosen the dirt for new trees to take root

• provide food for animals returning to the area

• can grow rapidly even in areas with shallow soil

Which of the following is an example of one stage in ecological succession?

• A tree falls over in a forest

• Weeds grow in a garden

• Fish swim in a pond

• a desert

• a shallow sea

• a tundra

• a rainforest

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NGSS.MS-LS2-2

NGSS.MS-LS4-1

A biological community of interacting organisms and their physical environment

• ecosystem

• community

• food chain

• biodiversity

Tags

NGSS.MS-LS2-2

All the living communities in an area PLUS the abiotic factors.

• population

• ecosystem

• biome

• habitat

The simplest grouping of more than one kind of organism in the biosphere is

• a population.

• a community.

• a species.

• an ecosystem

After a catastrophic wildfire that clears the land of all plants and trees, -

• weeds will grow in the area before trees grow

• plants will not grow again in the burned area

• bushes will grow in the area before weeds grow.

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NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A forest is most sustainable when it has -

• tall trees only

• small shrubs only

• a variety of plant species

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5