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G lobal L earning and O bservation to B enefit the E nvironment www.globe.gov
GLOBE is a worldwide hands-on, primary and secondary school-based science and education program.
GLOBE Mission To promote the teaching and learning of science, enhance environmental literacy and stewardship, and promote scientific discovery.
GLOBE Goals Improve student achievement across the curriculum with a focus on student research in environmental and Earth system science;
GLOBE Goals Enhance awareness and support activities of individuals throughout the world to benefit the environment;
GLOBE Goals Contribute to scientific understanding of Earth as a system;
GLOBE Goals Inspire the next generation of global scientists.
Since beginning in 1995, there are now more than 40,000 GLOBE-trained teachers representing over 20,000 schools around the world. GLOBE students have contributed more than 18 million measurements to the GLOBE database for use in their inquiry-based science projects.
Good temperatures are dependent on the type of body of water you are monitoring. Lowland streams, known as "warm water" streams, are different from mountain or spring fed streams that are normally cool. In a warm water stream temperatures should not exceed 89 degrees (Fahrenheit). Cold water streams should not exceed 68 degrees (Fahrenheit). Often summer heat can cause fish kills in ponds because high temperatures reduce available oxygen in the water.
Water clarity and turbidity Secchi disc Secchi depth is a measure of the clarity or turbidity of the water. Secchi depth is measured using a circular plate, called a Secchi disk, which is divided into quarters painted alternately black and white. The Secchi disk is lowered into the water until it is no longer visible, and that depth is measured. Secchi depth values that are high indicate clearer water, and low Secchi depths indicate high turbidity.
pH Level pH, in simple terms, is a chemical measure of whether or not something is an acid or a base. It is measured on a log scale of 0 to 14, with each unit representing a ten-fold change. A pH of 7 is considered neutral and a range of 5.5 to 8.5 is usually tolerated by most aquatic organisms.
Dissolved oxygen An example from the deep-water mid-Channel Chesapeake Bay showing low dissolved oxygen (DO) in the summer. The amount of oxygen dissolved in water is probably the single most important measure of habitat quality; without oxygen, all of the living resources familiar to us perish. Dissolved oxygen (DO) is measured as a concentration (mg/l – milligrams per liter). A measure of 5 mg/l is considered low; most of the more visible organisms will not survive in water of less than 1 mg/l for more than a few hours.
Nitrogen-containing compounds act as nutrients in streams and rivers. Nitrate reactions [NO3-] in fresh water can cause oxygen depletion. Thus, aquatic organisms depending on the supply of oxygen in the stream will die. The major routes of entry of nitrogen into bodies of water are municipal and industrial wastewater, septic tanks, feed lot discharges, animal wastes (including birds and fish) and discharges from car exhausts. Bacteria in water quickly convert nitrites [NO2-] to nitrates [NO3-].
Water with nitrite levels exceeding 1.0 mg/l should not be used for feeding babies. Nitrite/nitrogen levels below 90 mg/l and nitrate levels below 0.5 mg/l seem to have no effect on warm water fish.
Biological water quality monitoring Biological monitoring or bio-monitoring evaluates the presence, absence, and abundance of certain organisms in the stream. This type of monitoring gives an overall assessment of the health of the stream based upon the ecological conditions of the stream--what critters are making the stream their home.
To Join the GLOBE Program Teachers and other educators who wish to lead students in GLOBE need to attend special workshops in order to fully participate in the program. Look up currently scheduled workshops and if you do not find a workshop you can attend, contact a Partner . Click here to see an agenda.
If I Could Be Water If I could be water I wouldn't be a pond Muddy and brown, I wouldn't be an ocean Big and alone, I wouldn't be rain Falling again and again, I wouldn't be ice Cold and frozen, I would be a river Long, wide and free. Bailey Bystry, age 11 2008 Finalist Glen Ellyn, Illinois Writers' Studio Teacher: Naazish Yarkan