Science 9 Unit C OA#2
Quiz by Melissa Zuk
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16 questions
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- Q1Which of the following most accurately defines a heavy metal?metals that have a density of 5g/cm3 or morea type of highly amplified rock music with a strong beatmetals that have a density of 5g/cm3 or lessmetals that have a weight of 5g/cm3 or less30s
- Q2What are aquatic invertebrates?land animals without backbonesaquatic animals without backbonesland animals with backbonesaquatic animals with backbones30s
- Q3All of the following are Chemical Factors that Affect Aquatic Organisms EXCEPT...pesticidesdissolved oxygenacidityconductivity30s
- Q4Which of the following provides an example of a solute?The sugar crystals dissolved in ice teaThe carbonation in popThe milk in hot chocolateThe water in ice tea30s
- Q5Which of the following is considered the 'universal solvent'?any liquiddissolved oxygenjuicewater30s
- Q6If you have 2 mg of solute in a 100 L solution, how many parts per million of the solute is present?2%0.002 g/L200 mg/mg20 000 ppm30s
- Q7Which of the following describes a biotic factor that impacts dissolved oxygen content?number of organisms using oxygenrate of photosynthesistemperature of the watertemperature of the water30s
- Q8Most organisms need approximately how many milligrams per liter of dissolved oxygen to survive?5 mg/L8 mg/L5 ppm3 mg/L30s
- Q9The greater the parts per million of dissolved oxygen, the __________ the diversity of species.lessergreater30s
- Q10If you have 0.006 mL of a mercury in a 1000 mL sample solution of pond water, how much mercury does the sample contain in parts per million?6000 ppm6ppm0.000006 ppm60%30s
- Q11Phosphates and Nitrates often enter the water supply by...food waste from dumpstersdead and decaying organismswaste from powerplantsrunoff and sewage30s
- Q12Phosphates and Nitrates increase the growth of which of the following in aquatic ecosystems?grasses and other cropsaquatic vertebratesaquatic invertebratesweeds and algae30s
- Q13Sulfur and nitrogen oxides emitted from industries (such as smelters) combine with what molecule in the air to produce sulfuric and nitric acid?watermethanecarbon dioxideoxygen30s
- Q14Which of the following is NOT an effect of acid rain?lowers dissolved oxygencorrodes metalsdelays tree growthleaches toxic chemicals from the soil30s
- Q15Periods of extreme acidity (like in the spring when the acid snow melts and the acidic water enters the waterways) are called...acid shockacid toxicityacid depositionacid rain30s