environment science

what is Ecology ?

• the study of interactions and relationships between organisms and their environments, focusing on energy transfer

• all living organisms

• Abiotic factors- nonliving parts of the environment

• factors that prevents population growth

whats abiotic factors

• micobes in soil

• all living organisms

• nonliving parts of the environment

• factors that prevents population growth

whats Biotic factors?

• actors that prevents population growth

• all living organisms

• nonliving parts of the environment

• none

Which of the following are missing from the food web?

• Producers

• Decomposers

• omnivores

• Predators

Which of the following lists only organisms that are secondary consumers in this food web?

• Mice, rabbits, herbivorous insects, and squirrels

• Predaceous Insects, toads, spiders, and foxes

• Spiders, foxes, owls, hawks, and snakes

• Insectivorous birds, seed-eating birds, owls, and hawks

An environmental change that removed which of these organisms from the ecosystem would cause the most instability in the ecosystem?

• Zooplankton

• Auklets

• Foxes

• Salmon

In this food chain, which organism is FEEDING on a primary consumer?

• Grasshopper

• Bluebird

• Owl

• Snake

Mercury is introduced into the environment by many different industrial processes. Mercury that reaches the ocean is taken in by zooplankton. The picture shows a food chain containing zooplankton.

• Fish-eating birds

• Large fish

• Small fish

• Zooplankton

what is limiting factors?

• factors that prevents populations growth

• maximum population size the environment can sustain indefinitely

• total population size per unit of area.

  number/square mile

• Limiting factors that depend on population size

whats carrying capasity?

• maximum population size the environment can sustain indefinitely

• can determine carry capacity.

• total population size per unit of area.

  number/square mile

• Limiting factors that depend on population size