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- 1. Multiple Choice
Which of the following is found in our atmosphere?
water vapor
dust and pollen
gases
all of the above
- 2. Multiple Choice
Generally, as altitude increases, temperature ___.
Increases
Decreases
Fluctuates
Stays constant (the same)
- 3. Multiple Choice
Which layer of the atmosphere has the highest density of gas molecules?
Exosphere
Mesosphere
Stratosphere
Thermosphere
Troposphere
- 4. Multiple ChoiceWhat is the percentage of oxygen in Earth's atmosphere?1%21%78%90%
- 5. Multiple Choice
Which gas forms liquid first as the air is cooled
Oxygen
Argon
Nitrogen
- 6. Multiple Choice
________ is used in medical research, to keep tissue samples frozen.
Liquid nitrogenAcetoneLiquid heliumLiquid oxygen
- 7. Multiple Choice
A mixture of ________ is used as the fuel in oxy-acetylene torches for cutting and welding metal.
Acetylene and oxygenArgon and heliumHydrogen and nitrogenPropane and methane - 8. Multiple Choice
Which ones are consider primary air pollutants?
Nitrogen oxides
Sulfur dioxides
Carbon monoxide
all are correct!!!!
- 9. Multiple ChoiceWhat causes acid rain?High concentrations of sulfuric or nitric acid from pollutionFertilizer usePesticide useCFCs
- 10. Multiple Choice
Source of carbon monoxide
Incomplete combustion of fossil fuels
Combustion of fossil fuels
Decomposition of plant and animal matters
Photochemical reaction of CO2
- 11. Multiple Choice
Why is a coagulant used for, in water treatment plants?
To destabilize particles in the water and aid in their removalTo reduce the temperature of the waterTo add color to the waterTo increase the pH level of the water - 12. Multiple Choice
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- 19. Multiple Choice
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- 20. Multiple Choice
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- Answer choicesTagsAnswer choicesTags