UNIT 8 TEST

Which of these describes an ecosystem?

• all of the animals living in the forest

• all of the animals living in the forest parts the nonliving parts of the forest

• all of the nonliving parts of the forests

All of the different living organisms in an area make up a

• community

• population

• ecosystem

All of the panthers in the jungle make up a

• community

• ecosystem

• population

Which shows the correct order form the smallest level to the largest level?

• community, biome, population, ecosystem

• ecosystem, population, community, biome

• population, community, ecosystem, biome

Bacteria would be a ______ factor in an ecosystem.

• abiotic factor

• biotic factor

• nonfactor

Which of these describes abiotic factors in an ecosystem?

• soil, temperatures and rain

• soil, worms in the soil

• worms, bacteria and fungus growing in or near the soil

Which of these describes abiotic factors in the tundra?

• artic foxes hunt and capture small rodents

• soils are permanently frozen (permafrost)

• small lichens (symbiotic relationship between a algae and a fungus) may grow on rocks

True or False? Due to the rate of photosynthesis increasing, summer months tend to have less carbon in the atmosphere.

• True

• False

Which is a reason that energy pyramids don't usually have more than 4 levels?

• There are too many producers

• 90% energy is lost at each level

• decomposers use most of the energy

Look at the food web. Which correctly shows the flow of energy?

• fox to rabbit to carrot

• grass to mouse to rabbit

• carrot to rabbit to fox