Lesson 1: Ecosystems
An _________ is all the living and nonliving things in an environment and the many ways they interact.
Ecosystem
Plants are called ___________ because they make their own food.
Producers
What have the greatest amount of energy in an ecosystem?
A. Consumers
B. Producers
C. Decomposers
What are the three things can create a positive or negative effect on the environment?
Animals, Plants, Humans
The driest ecosystem is a _________. Some plants and animals adapted the limited water supply. Cacti, coyotes, and lizards can be found in this region.
Desert
Living things that eat other living things are called ____________.
Consumers
___________ is the transfer of energy from one organism to another by eating and being eaten.
Food Chain
_______________ occurs when two or more living things need the same resources in order to survive.
Competition
Most ______ _______ are tropical regions. They are home to organisms such as spotted owls, banana slugs, and Douglas fir trees.
Rain Forests
A bear can eat grass and salmon, which would make it a …
A. Omnivore
B. Carnivore
C. Herbivore
A - Omnivore
A food chain always begins with energy from the ___________.
Sun/Sunlight
Overfishing, Pollution, Poaching...
A ________ is a cold region. The ground beneath the surface is frozen all year. Some grasses can grow, but trees cannot.
Tundra
Organisms that break down plant and animal waste and remains are called _______________.
Decomposers
A ___________ is a system of overlapping food chains in which the flow of energy branches out in many directions.
Food Web
Name an animal that creates a negative effect on the environment. Explain your answer.
Possible Answer: Beavers can create a negative effect on the environment because they cut down an average of 5 trees per day.
In __________, the ground is covered with water for at least part of the year. Water lilies and cypress trees grow here.
Wetlands
Herbivores, Carnivores, Omnivores
An _________ __________ is a diagram that shows the amount of energy that flows from producers to consumers.
Energy Pyramid
Name a plant that creates a negative effect on the environment. Explain your answer.
Possible Answer: The purple loosestrife plant is not beneficial since no animal can eat it and it takes up a lot of space.