FieldScope in the Field
The World Water Monitoring Project encourages citizen scientists to test the turbidity, temperature, dissolved oxygen, and pH of local water resources.
Photograph by Jackie Karsten, National Geographic
chemical compound that reacts with a base to form a salt. Acids can corrode some natural materials. Acids have pH levels lower than 7.
(singular: alga) diverse group of aquatic organisms, the largest of which are seaweeds.
(singular: bacterium) single-celled organisms found in every ecosystem on Earth.
to observe or mark an important event with public and private ceremonies or festivities.
diagram, often in the form of a graph or table, with information on the relationships between the subjects represented.
science project or program where volunteers who are not scientists conduct surveys, take measurements, or record observations.
clearness or transparency.
structure built across a river or other waterway to control the flow of water.
(singular: datum) information collected during a scientific study.
construction or preparation of land for housing, industry, or agriculture.
measure of the amount of oxygen in a substance, usually water.
to inspire or support a person or idea.
act in which earth is worn away, often by water, wind, or ice.
sign or signal.
body of water surrounded by land.
symbolic representation of selected characteristics of a place, usually drawn on a flat surface.
to observe and record behavior or data.
large body of salt water that covers most of the Earth.
measure of a substance's acid or basic composition. Distilled water is neutral, a 7 on the pH scale. Acids are below 7, and bases are above.
natural or man-made lake.
available supply of materials, goods, or services. Resources can be natural or human.
large stream of flowing fresh water.
overflow of fluid from a farm or industrial factory.
body of flowing water.
degree of hotness or coldness measured by a thermometer with a numerical scale.
cloudiness or lack of transparency.
all the plant life of a specific place.
chemical, physical, and biological characteristics of water for a specific purpose such as drinking.
entire river system or an area drained by a river and its tributaries.
a hole drilled in the Earth to obtain a liquid or gaseous substance.