Paper Quiz


Become a member to get full access to our entire library of learning videos, reading material, quiz games, simple DIY activities & more.
Plans & PricingIf you are on a school computer or network, ask your tech person to whitelist these URLs:
*.wisita.com, fast.wistia.com, fast.wistia.net, embedwistia-a.akamaihd.net
Sometimes a simple refresh solves this issue. If you need further help, contact us.
All the living and nonliving things in an area.
Nonliving things include air, water, temperature, amount of sunlight, minerals, salinity, and pH.
Such factors include things like resource availability, competition between organisms for resources, organisms eating other organisms, and changes in the environment.
Organisms might interact in an ecosystem to get the food, water, or shelter they need to survive.
Answers will vary.
If we understand the feeding relationships between organisms in an ecosystem, then we have a better understanding of energy flow within the ecosystem. Relationships vary in importance with respect to energy flow as well as the overall effect on ecosystem stability.
Competition, predation, parasitism, mutualism, and commensalism
Without predators, organisms that are prey (like the rabbit in the video) would become overpopulated in an ecosystem. Eventually, they would eat all of the plants, become sickly, and/or die of starvation.
Food webs show where each organism gets its energy from.
Over many generations, both organisms have adapted and found a specialty that allows both to thrive. For example, the hawk hunts during the day, and the owl hunts at night.
Both the termite and the bacteria benefit from the feeding relationship (mutualism). Without the bacteria, the termite would starve; without the termite the bacteria would not have a food source. If this were a parasitic relationship, then one of the organisms would benefit, and the other would be harmed.
An ecologist and a marine biologist are two careers that study symbiotic relationships. An ecologist could study all kinds of ecosystems, and knowing the interactions can help her or him preserve ecosystems. A marine biologist specializes in studying life in the ocean.
All the living and nonliving things in an area.
Interaction between organisms of two different species.
Relationship in which one organism eats another organism.
Relationship in which two organisms compete for the same resource.
Relationship in which one organism benefits and the other is harmed.
Relationship in which both of the organisms benefit.
Relationship in which one organism benefits and the other organism is neither helped nor harmed.
Model showing where each organism in an ecosystem gets its energy.
What is a mutualistic relationship? Describe an example.
What is a parasitic relationship? Describe an example.
What is commensalism? Describe an example.
"My students loved the videos. I started the video subscription in May and used them as a review before the state test, which I know contributed to 100% of my class passing the state test."
Rhonda Fox 4th Grade Teacher, Ocala, Florida• No credit card required •
Cancel anytime in 1-click on the manage account page before the trial ends and you won't be charged.
Otherwise you will pay just $10 CAD/month for the service as long as your account is open.
Cancel anytime on the manage account page in 1-click and you won't be charged.
Otherwise you will pay $10 CAD/month for the service as long as your account is open.
We just sent you a confirmation email. Enjoy!
DonePlease login or join.