Show:
Systems
Energy
Foodweb
Foodchain
100
It has parts that work together for a purpose
Why is a desert a system?
100
sunlight
What is the main energy source for life on earth?
100
The food web will change
What is most likely to happen if most of a population of animals die of disease?
100
an organism like an insect that eats the remains of animals
What is a decomposer?
200
a system where living and nonliving things interact
Which best describes an ecosystem?
200
c. consumer
Which best describes the role of zooplankton in a food web? a. protist b. producer c. consumer d. decomposer
200
an animals that eats plants and animals
What is an omnivore?
300
the amount of food decreases
What is the best explanation for a decrease in a population of birds in a community?
300
The decaying organisms put minerals back into the soil
How do decaying organisms in a swamp help create the next generation of organisms?
300
d. nutrients and minerals
Which of these things that animals need travel through a food chain? a. herbivores b. ecosystems c. air and sunshine d. nutrients and minerals
400
The habitat of a desert roadrunner is the desert. Its niche is the job it does, which is chasing food like lizards, and trying to escape being the food or other animals like coyotes.
What is the difference between the niche and the habitat of a desert roadrunner?
400
A food web is a system of many food chains where the flow of energy branches in many different directions. A food chain only goes in one direction, and shows how organisms transfer energy.
Describe what a food web is and how it differs from a food chain.
400
It eats algae and is eaten by blue herons
What is the place of the freshwater snail in the swamp food chain?
500
What Rachel sees helps explain the food web in the swamp and how materials cycle through the system. The algae are producers that make food from sun. The snails eat the algae, and the cranes and fish eat the snails. When these organisms die, the fungi are decomposers that absorb dead orgranisms, returning the nutrients and minerals to the ecosystem. All these organisms work together to keep cycling energy and nutrients through the swamp. Soon, the cycle begins again with new algae.
Rachel is looking at a swamp. She sees sandhill cranes swooping by, algae on a pond, small snails, fungi, and some fish. Explain how what Rachel sees helps tell the story of how the organisms she sees are connected and how thay all help the swamp ecosystem thrive.
500
b. grass
Which of these is a producer? a. deer b. grass c. hawk d. worm