Watch this video on food webs and how biotic and abiotic factors in an ecosystem are connected.
Amoeba Sisters Video on Food Webs and Energy Pyramids
Food Web Project
Create a food web for an ecosystem that is within the State of Maine. For example a forest, field, stream, backyard, saltmarsh, or beach. You are encouraged to choose an ecosystemthat you are familiar with. You should organize your food web so that relationships between organisms are demonstrated (like we did in class).
A good way to start:
Brainstorm organisms within an ecosystem (you should have 15-20)
Place the organisms into groups: producer, consumer, decomposer (click to find more).
MS-LS2.A.2 ( Middle School Life Sciences ): Growth of organisms and population increases are limited by access to resources.
MS-LS2.A.3 ( Middle School Life Sciences ): In any ecosystem, organisms and populations with similar requirements for food, water, oxygen, or other resources may compete with each other for limited resources, access to which consequently constrains their growth and reproduction.
MS-LS2.B.1 ( Middle School Life Sciences ): Food webs are models that demonstrate how matter and energy is transferred between producers, consumers, and decomposers as the three groups interact within an ecosystem. Transfers of matter into and out of the physical environment occur at every level.
MS-LS2.C.1 ( Middle School Life Sciences ): Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
Task: You will be researching and writing an informational editorial article on an ecological or biological topic. You should choose a current event that is of high interest to you in order to share your knowledge and enthusiasm with your audience.
UVA rays cause skin aging and wrinkling and contribute to skin cancer, such as melanoma. Because UVA rays pass effortlessly through the ozone layer (the protective layer of atmosphere, or shield, surrounding the earth), they make up the majority of our sun exposure. Beware of tanning beds because they use UVA rays as well as UVB rays.
UVB rays are also dangerous, causing sunburns, cataracts (clouding of the eye lens), and effects on the immune system. They also contribute to skin cancer. Melanoma, the most dangerous form of skin cancer, is thought to be associated with severe UVB sunburns that occur before the age of 20. -summarized from Kids Health