Evaluate the claims, evidence, and reasoning that the complex interactions in ecosystems maintain relatively consistent numbers and types of organisms in stable conditions but changing conditions may result in a new ecosystem.
Design, evaluate, and refine a solution for reducing the impacts of human activities on the environment biodiversity.
A complex set of interactions within an ecosystem can keep the ecosystem’s numbers and types of organisms relatively constant over long periods of time under stable conditions.
If a modest biological or physical disturbance occurs to an ecosystem, that ecosystem may return to its more or less original status (i.e., the ecosystem is resilient), as opposed to becoming a very different ecosystem.
Extreme fluctuations in conditions or the size of any population, however, can challenge the functioning of ecosystems in terms of resources and habitat availability.
Anthropogenic changes (induced by human activity) in the environment can disrupt an ecosystem and threaten the survival of some species.
Biodiversity is increased by the formation of new species (speciation) and decreased by the loss of species (extinction).
Humans depend on the living world for the resources and other benefits provided by biodiversity. But, human activity is also having adverse impacts on biodiversity.
Thus, sustaining biodiversity so that ecosystem functioning and productivity are maintained is essential to supporting and enhancing life on Earth.
Sustaining biodiversity also aids humanity by preserving landscapes of recreational or inspirational value.
When evaluating solutions, it is important to take into account a range of constraints including cost, safety, reliability and aesthetics and to consider social, cultural, and environmental impacts.
Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.
Each atom has a charged substructure consisting of a nucleus, which is made of protons and neutrons, surrounded by electrons.
The periodic table orders elements horizontally by the number of protons in the atom’s nucleus and places those with similar chemical properties in columns. The repeating patterns of this table reflect patterns of outer electron states.
Communicate scientific and technical information about why the molecular-level structure is important in the functioning of designed materials.
Attraction and repulsion between electric charges at the atomic scale explain the structure, properties, and transformations of matter, as well as the contact forces between material objects.