is a measure of a material’s capacity to conduct electricity.
What is conductivity
100
is any of a class of substances that yields hydrogen ions (H+) when dissolved in water.
What is acid
100
What is the challenge and what for
The challenge is for students to determine which filter media they should use to get the purest filtered water.
100
___________ contaminants are usually responsible for taste, odor, color, and turbidity (clarity) problems.
Organic
200
includes evaporation and precipitation, is just part of the recycling system that also includes filtration through the Earth’s soil and rock, and in modern times, water treatment plants.
What is water cycle
200
True or false:
Completely pure water will not conduct electrical current.
True
200
is any of a class of substances that yields hydroxide ions (OH-) when dissolved in water.
What is a base
200
True or False:
When building the conductivity tester,
it does not matter which color lead goes into which slot.
True
200
is what makes the wastewater conductive.
Salt
300
is a reusable vehicle, unlike those earlier spacecraft, and its life support system incorporates some
advances, but it still relies heavily on the use of consumables, limiting the time it can stay in space.
The Space Shuttle
300
What must be created in order to measure conductivity
A circuit
300
The pH scale ranges from 1 to 14 where 7 is _______, greater than 7 is __________, and less than 7 is _________.
Neutral, basic, acidic
300
True or False:
You should allow the loose battery snap connector wire to touch the metal part of the lead inserted into the slot labeled mA.
False
300
Ingredients used to demonstrate pH strips
Baking soda and vinegar
400
provides clean water by reclaiming wastewater (including water from crewmember urine, hand wash, and oral hygiene waters); cabin humidity condensate; and extravehicular activity (EVA) wastes.
What is water recovery system
400
is a closed path through which a continuous current can flow.
What is Circuit
400
lets you determine the relative acidity of a substance.
pH scale
400
When testing the conductivity tester,
What should you do if the salt does not completely dissolve
add more water.
400
is used in the removal of organic contaminants in water.
Activated carbon
500
The Space Station ECLSS consists of two key components
the Water Recovery System (WRS) and the Oxygen Generation System (OGS).
500
the smaller the amount of current that flows through the treated wastewater, the lower the ____________ of inorganic contaminants.
Concentration
500
The greater the concentration of hydrogen ions produced, the more _______________ the substance is.
Acidic
500
If the conductivity tester has been assembled correctly, the multimeter will register a ____________.
Current
500
the absorption of __________ and ____________ ions could lower the conductivity of the wastewater.