Skip Navigation
FREE: Federal Resources for Educational Excellence - Teaching and Learning Resources From Federal Agencies
RSS



Home
Subject Map
Go
Science
Applied Sciences
Computers/Tech (16)
Engineering (26)
Earth Sciences
Climate Change (42)
Environment (64)
Geology (37)
Oceans (42)
Other Earth Sciences (76)
Life Sciences
Animals/Zoology (35)
Botany (19)
Cells (26)
Diseases (35)
Genes, Evolution (43)
Human Body (31)
Interdependence (25)
Medicine (28)
Other Life Sciences (45)
Physical Sciences
Chemistry (37)
Energy (25)
Physics (46)
Other Physical Sciences (23)
Space Sciences
Aeronautics (27)
Astronomy (60)
Other Space Sciences (31)
Other Science (45)
 
What's New
Calendar

Science » Other Science

Cleaning Water

is a lesson in which students (Grades 3-5) create and test a system to filter "gray" water. Astronauts on the International Space Station (ISS) recycle their water, including moisture from their sweat and exhalations and water from showering and shaving. These wastewaters are purified and then used as drinking water. (National Aeronautics and Space Administration)

   Go to this website

Interesting Fact:

Public water systems have to meet a pH level of 6.5 to 8.5. The ISS water is required to be within the range of 6.0 to 8.5. The recycled water on the ISS is sterile, and there is no odor or bad taste.
The pH scale ranges from 0 to 14 and is a tool used by scientists to measure the strength of an acid or base.

pH color chart


    About FREE      Privacy     Security     Disclaimer     WhiteHouse.gov     USA.gov   ED.gov