What can we do to keep peace in our world? Who will guide us as
world citizens? What examples do we need to make or follow to be
good world citizens? How do plants and animals in an ecosystem
interact with one another and the non-living environment? Humans
can have a major impact on ecosystems. The student will plan and
conduct investigations in which a) distinctions are made among
observations, conclusions, inferences, and predictions; b)
hypotheses are formulated based on cause-and-effect
relationships; c) variables that must be held constant in an
experimental situation are defined; h) predictions are made
based on data from picture graphs, bar graphs, and basic line
graphs. The student will investigate and understand how plants
and animals in an ecosystem interact with one another and the
nonliving environment. Key concepts include influence of human
activity on ecosystems. • During its life cycle, an organism’s
role in the community — its niche — may change. For example,
what an animal eats, what eats it