A
Vocabulary:
a substance added to soil or sprayed on crops to provide plants with essential nutrients
fertilizer
An increase in the _____________ of water can be a warning that water has been contaminated with abnormal amounts of salts, minerals, wastewater, or metals.
conductivity
Vocabulary:
the process of repeating something, such as a set of steps or a procedure, usually in order to get closer to a desired result
iteration
Vocabulary:
a measure of how a specified material conducts electricity
conductivity
Vocabulary:
the process of using a filter to separate solids from a liquid or gas
filtration
What are insoluble substances? (give the definition)
a substance that does not dissolve into liquid
Vocabulary:
any substance that is intended to kill or repel pests
pesticide
True or False
Escherichia coli (E. coli) are another bacteria often found in the human intestines. Most strains of E. coli are harmless.
True! Most strains are harmless, but some can cause illness and infection.
True or False:
Even though high phosphate levels can encourage the growth of algae and bacteria, but they are not harmful to humans.
True!
Phosphates are found in different foods and products, including fertilizer and cleaning supplies.
Bifidobacterium is another helpful bacteria, and are naturally found in the stomach and intestines. Bifidobacterium assists with digestion, produces ___________, and helps prevent infections.
vitamins
E. coli can be excreted from the human body into waste materials. If these make contact with drinking water, the harmful strain of E. coli can cause severe __________ and __________.
vomiting and diarrhea :(
Vocabulary:
a limit or restriction on a design
constraint
Vocabulary:
a substance that contains phosphorus
phosphate
Vocabulary:
water contaminated by human use
wastewater
6 hours to two days (depending on cloud coverage)
Vocabulary:
a pollutant that makes a substance, such as water or food, dirty and unsafe for use
contaminant
During the solar disinfection process (SODIS), what specifically kills the bacteria and dangerous pathogens?
ultraviolet light
Lactobacillus lives in the digestive tract. What does it do? (Hint: is this a harmful or beneficial bacteria?)
It helps prevent infections and diarrhea, and helps fight against harmful bacteria.
Referring back to the King of Cool video, what percentage of food in the US today is refrigerated during transportation?
75%
Vocabulary:
an early model or design that is created for testing or evaluation
prototype
Vocabulary:
the process of making something, such as the human body, absorb water
hydration
Vocabulary:
a measure of the cloudiness or haziness of a fluid caused by individual particles
turbidity
Vocabulary:
having many holes that water, or other substances, can pass through
porous
Vocabulary:
a microscopic, single-celled living organism that can be beneficial, such as those that aid digestion, or harmful and cause diseases
bacteria
Vocabulary:
the smaller pieces that remain of something larger that has been broken down
debris