phase changes
Science theory
Ph
sollubility
Random
100
Where on the graph is the substances melting point?
B
100
What could a scientists do if data does not support their hypothesis?
answers vary
100
What is the Ph of a "strong acid"?
0-3 very low
100
Why is water called the "universal solvent"?
It dissolves more substances than any other liquid.
100
What are particles like in a solid liquid and gas (draw diagram)?
200
Which point in the graph is the boiling point
D
200
How can you tell if two unknown substances are the same?
characteristic properties!!!!!
200
What is the Ph of a "strong base"?
12-14 very high
200
Whats the relationship between solute solvent and a solution?
A solute is what the solvent dissolves into to create a solution
200
Where can water pick up contaminants in the water cycle?
Atmosphere
300
Which point on the graph is the substance entirely a solid?
A
300
What are examples of characteristic properties?
melting and boiling points, density, solubility and so on
300
What is a liquid with a neutral Ph?
pure water
300
What factors effect solubility?
Temperature, Pressure (only with gas), and the presence of other solutes
300
What is a social concern for drilling oil in the US?
disrupting wildlife, water sources, human health,
400
Which point is the substance entirely a liquid?
C
400
If you have a mixture of a solution and solids in it how can you change it to get the solution by itself?
Manually remove solids by forceps, filtration, etc.
400
How do you neutralize an acid?
a weak base like bleach
400
Which has the highest concentration; 2 ppm, 15 ppm, 60 ppb, or 200 ppb?
15 ppm,2 ppm 60 ppb,200 ppb
ppm > ppb
400
Which government agency would be responsible for industrial air pollution laws?
Environmental Protection Agency (EPA),
500
Which point on the graph is the substance entirely a gas?
F
500
what set of tools would you use to separate a mixture of water salt, and gravel?
use a magnet to separate the paper clips. Step 2: Use something to separate the gravel (you are now left with sand and salt). Step 3: Add the water to dilute the salt and filter the sand.
500
How do you neutralize a base?
add a weak acid like lemon juice
500
What contaminants can be found in water?
Biological: waterborne disease, animal waste, human waste bacteria and viruses
Chemical: fertilizers, gasoline, heavy metals
500
What is the best method for removing dissolves solid pollutants from wastewater?
biological methods have proved most effective or physical adsorption, reverse osmosis (RO), distillation, precipitation, membrane filtration, and bacteria‐based bio-remediation