Ecosystems

A habitat is?

• nonliving things

• interactions between species

• resources in a ecosystem

• where a species lives

matter ________ ecosystems

• flows out of

• cycles around

• stays in the same part

• is found only in

Where do consumers get their energy?

• directly from sunlight

• by breathing

• from eating other organisms

• all of the above

Where does the energy in most ecosystems originate?

• sunlight

• producers

• water

• air

Which of the following might be found in a freshwater ecosystem?

• water-dwelling bacteria

• interactions among fish

• rocks and shells

• all of the above

The relationships a population has with others in its community are:

• always harmful

• always beneficial

• neither harmful or beneficial

• sometimes harmful and sometimes beneficial

The constant cycle of precipitation and evaporation provides ______ for the Earth's organisms.

What is the role of decomposers in an ecosystem? Choose more than one answer.

• return nutrients to the soil

• make energy for plants

• clear the environment of dead organisms

• provide food for consumers

• absorb water

What is the a producer's niche?

• create their own food

• eat organisms

• are broken down by decomposers

• use energy originating from the Sun

In most food chains, all of the energy originally comes from:

• plants

• dead matter that's been recycled by decomposers

• heat from deep within the Earth

• the Sun