Quick Quads Set 3 Responses

1. According to Scientist 1, which of the following is the cause of the eutrophication?

• a change in the pH of the water
• the increasing changes in phytoplankton
• agricultural run-off from human activity
• the build-up of phosphates in the body of water

2. What is the main point of disagreement between Scientist 1 and Scientist 2?

• The source of Nitrogen
• The root cause of eutrophication
• The effects of lack of oxygen
• The effect of the plant life in the aquatic ecosystem

3. Both scientists would likely agree that eutrophication is

• algae that will occasionally grow in aquatic ecosystems due to human activities
• a bloom of phytoplankton that grows in response to high levels of phosphates
• a large build-up of algae that grows at a rapid rate in a body of water
• an explosion of algae due to natural factors and the need to reduce overpopulationm

4. According to Scientist 2, eutrophication is necessary for

• the control of overpopulation in an aquatic ecosystem
• the natural control of the pH of water in an aquatic ecosystem
• the normal process that takes place in a pond in response to farmland runoff
• the rejuvenation of aquatic life, which thrives during such an event

5. Scientist 1 probably mentions farming and agriculture in order to

• point to a human activity that would cause eutrophication
• show that humans changing natural land is bad for the environment
• bolster his case for humans causing a change in the pH of the water that leads to eutrophication
• bolster his case that human activity such as farming increases nitrates, leading to eutrophication

6. The end result of a severe eutrophication event will always be

• A regrowth of new life because of the nitrates in the water.
• The death of the phytoplankton when it over-accumulates
• A massive die off of both plant and animal life in the aquatic environment
• The growth of more plant life in the water s they grow well with plankton

7. Based on the results of experiment 3, if the pressure of a gas is doubled and the volume of the gas in cylinder is held constant, what will be the impact on temperature?

• It will stay the same
• It will be doubled
• It will be halved
• It will be quadrupled

8. Which of the following could be the graph of "pressure x volume versus pressure"?

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• 
• 

9. Based on the results of experiment 2, what would be the volume of the gas in the cylinder is heated to 350K?

• 1300 mL
• 1400 mL
• 1500 mL
• 1600 mL

10. Which of the following experiments will best help the scientist to study the relationship between the volume of a gas (in mL) and the amount of the gas (in moles)?

• Experiment A: fill a balloon with one mole of hydrogen gas and another balloon with one mole of helium gas, with both at a constant temperature, and measure the volumes of the two balloons.
• Experiment B: fill a cylinder of a fixed volume with hydrogen gas and another cylinder of a fixed volume with helium gas, with both at standard conditions of temperature and pressure, and measure the weights of the gases in the two cylinders.
• Experiment C: fill a balloon with one mole of hydrogen gas and another balloon with two moles of hydrogen gas, with both at a constant temperature and pressure, and measure the volumes of the two balloons.
• Experiment D: fill a 1 liter cylinder with hydrogen gas and a 2 liter cylinder with propane gas, with both at room temperature, and measure the mass of gas in each cylinder.