|Environmental Science||Populations and Ecosystems 6G3.00||Process Of Science||Analyzing 1.4 a|
Sponsored by the National Science Foundation
CONTENT STANDARD: Environmental Science
CONTENT TOPIC: Populations and Ecosystems
CONCEPT: Factors influence the stability of ecosystems.
CONTENT OBJECTIVE: 6G3.00 To understand the factors which influence the stability of ecosystems
INSTRUCTIONAL OBJECTIVES: The learner will:
TN COMPONENT OF SCIENCE: Process Of Science
BENCHMARK: Information is organized into simple tables and graphs to identify relationships.
The stability of an ecosystem may be disrupted by non-human (Fire, flood) factors or by human (Urbanization, pollution) factors. A large disturbance (Volcanic eruption or prolonged drought) may alter or destroy an entire ecosystem.
When you study an ecosystem, you study how the nonliving and living things affect each other.
(Make a chart with these headings:
|Populations||Number of Individuals|
Keep a record of the population changes. Your ecosystem will contain more organisms than you can imagine.)
(Allow adequate time for discussion of human activities, climatic conditions, natural disasters, man-made disasters, predators, and population changes. One day per outline topic is suggested. After discussing natural disasters, have students clip out articles about natural disasters. This could lead to discussions of forest fires, droughts, rich lands, etc.)
(A miniature ecosystem can be created in a large bottle or a wide-mouth glass jar that has been thoroughly cleaned. Add a layer of crushed rock or pebbles to the bottom of the jar, then a layer of sand and soil. Add enough pond water to fill the jar to a height that allows for an air space above the water level. Allow the water to settle for about 3 days, until the water has cleared. Then, after anchoring some small water plants, add some small fish and snails. Place the mini-ecosystem in a location which provides indirect sunlight and a moderate room temperature. When the plants and animals all appear to be healthy and thriving, stopper the bottle or jar and allow the enclosed ecosystem, now balanced, to exist as a miniature balance of nature.)
Describe how people have been changing the face of the earth since prehistoric times. Name some big structures which people have built, like dams for instance. Tell how some of these structures changed the environment.
1. pollution |
This is the time this file has been accessed since 02/25/98.
The University of Tennessee at Martin is not responsible for the information or views expressed here.
Sixth Grade Science Home Page