Which Earth system includes all the living things on Earth?
Biosphere.
100
What is an ecosystem?
An ecosystem includes all the living organisms that interact within an environment (habitat).
100
What is a food chain?
The relationship between organisms that feed on each other. It represents the flow of energy between organisms.
100
Name a primary producer for each: an aquatic system and a terrestrial system. (Need both for points.)
Several possible answers:
Aquatic- kelp, phytoplankton
Terrestrial- grass, trees
100
What do decomposers eat?
They dead or decaying organic material.
200
The Geosphere includes what parts of earth?
The Geosphere includes all the land and non-living solid parts of Earth.
200
Think of our Woodland ecosystem. What 3 TYPES of organisms are found in this ecosystem?
Producers, Consumers, Decomposers. (Must have all 3 answers for points).
200
In a fresh water and marine ecosystem, what is the most important producer?
Phytoplankton. (Zooplankton is not a producer).
200
Describe a herbivore and a carnivore's relationship.
The herbivore eats plants and other producers while the carnivores eat the herbivores.
200
What is the role of a decomposer in an ecosystem?
They are the recycling system. They break down dead material and leave nutrients for producers to use to make energy again for the ecosystem.
300
We watched a video that described the eruption of Mt. Saint Helens. Which spheres of Earth were affected?
They were all affected the eruption.
300
Name 2 reasons why organisms compete in an ecosystem.
Organisms compete for food, shelter, or partners.
300
What do we call a system of interacting food chains in an ecosystem?
This would be a food web.
300
In the video of underwater food chains, what happened to make all the kelp disappear and create a sea urchin "desert"?
Humans hunted all the sea otters that eat the sea urchins. With all the otters gone the sea urchin population grew and they ate all of the kelp destroying the kelp forest.
300
Describe a Detritivore.
A detritivore is an organism that eats dead or decaying trees.
400
How was the Biosphere affected by the eruption of Mt. Saint Helens?
The eruption killed animals, plants, trees, and people. Destroyed the homes and food sources of many organisms in the area.
400
Where does an ecosystem's energy come from?
Producers or the Sun.
400
Place the following organisms into proper food chain order:
zooplankton, kelp fish, sea otter, phytoplankton, shark.
Describe the relationship between a fungi and mountain lion.
Once the mountain lion is dead, the fungi will begin to eat or break down the body.
400
What is an effect of woodpeckers, beetles and worms eating the bark of a tree?
This causes the tree to fall apart and allows other decomposers (termites, bacteria, fungi) to break down the wood.
500
Describe how the Hydrosphere AND the Atmosphere were affected by the eruption of Mt. Saint Helens. (Must include bot parts for full credit).
Hydrosphere was affected by the nearby water being poisoned by lava and gases. The Atmosphere was contaminated with ash and gases from the volcano.
500
How might human interaction affect an ecosystem?
We could take an ecosystem's energy source, the producers. We could hunt too many animals. We could pollute and poison an ecosystem that would cause organisms to longer be able to survive there.
500
What would happen in a food chain if there became too many consumers?
The abundant consumers would eat all of the producers. This would cause the consumers to starve. The entire food chain would be affected.
500
In the video "Earth Life", we saw a heard of impala migrating together. Describe the food chain that was presented.
Grass -> Impala -> Hunting Dogs
500
What effect do redworms have on organic material?
They consume it and recycle it into nutrients for producers.