Ecology Grade 6 LabAids

If you were to graph the data in the table, it would show:

• an increase in the population over time

• a decrease in the population over time

• the population staying the same over time

• an increase in population at first, followed by a decrease over time

What might be causing the pattern in these data?

• the population's food resources became less abundant

• the population's predators became less abundant

• the population's habitat became less abundant

• the population's competitors became more abundant

Which statement best describes an important difference between plants and animals?

• Plants get food from the soil while animals get food by eating other organisms

• Animals are alive but plants are not

• plants use carbon dioxide from the air and water to make their own food while animals get food by eating other organisms

• animals use energy stored in food but plants do not

The role of decomposers in an ecosystem is to:

• convert the suns energy into energy stored as food

• convert plant matter into matter that can be used by animals

• eat other living organisms for energy

• break down dead and waste matter

a food web show the flow of ________ through an ecosystem and the cycling of ___________ within an ecosystem

• matter, energy

• energy. matter

• food, waste products

• waste products, food

The original source of energy for food web is

• soil

• the sun

• water

• nutrients

The word "ecosystem" refers to:

• the physical environment

• living organisms

• living organisms and the physical enviornment

• living organisms in the laboratory

Which of the following statements about introduced species is TRUE

• most were introduced intentially by people

• they are more likely to cause problems in natural areas than in urban areas

• they are unlikely to cause problems for people

• their impact on the local ecosystem is difficult to predict

Shea decided to release her pet mouse into the woods behind her home. The possible tradeoffs of her decision include:

• her mouse may die in its new habitat

• she may have introduced a new species into the woods

• both a and b

• there are trade-offs associated with her decision

Disruptions in ecosystems:

• can be caused by abiotic and biotic factors

• can lead to short-term changes but not long-term changes

• can lead to increased stability in the ecosystem

• are usually caused by humans