Quiz about Envirochemistry Review #2

Question 1

which one of the following terms describes the image

Accepted Answer

turbidity

Answer

acidity

Answer

nitrates

Answer

temperature

Question 2

Which of the rivers has the best water quality?

Accepted Answer

peace river

Answer

Kissimmee river

Answer

tamiami river

Question 3

As acidity increases,

Accepted Answer

water quality decreases

Answer

water quality increases

Answer

water quality does not change

Question 4

We used bioindicators to measure the quality of water.  What is a bioindicator?

Accepted Answer

An organism sensitive to its environment

Answer

any living creature

Answer

eutrophication

Answer

pH paper

Question 5

What is the healthiest combination listed?

Accepted Answer

low temperature, neutral pH and low nitrates

Answer

low pH, high nitrates, neutral temperature

Answer

as many nitrates as possible, low temp and low pH

Answer

high temp, high nitrates and high pH

Question 6

How does increasing nitrates impact stream health?

Accepted Answer

excess algae

Answer

increased oxygen

Answer

increased water clarity

Question 7

Which water quality indicator will be most impacted by burning fossil fuels and air pollution?

Accepted Answer

pH (water will be more acidic)

Answer

nitrates

Answer

Dissolved oxygen

Answer

turbidity

Question 8

More dissolved oxygen in the water will lead to

Accepted Answer

more diversity of organisms.

Answer

a higher pH.

Answer

more turbidity.

Answer

a higher temperature.

Question 9

If there is a large variety of living organisms in and around a water supply, then could the water supply be considered healthy?

Accepted Answer

Yes, because it contains bioindicators, which are used to assess the health of a water supply.

Answer

No, because it contains nitrates.

Answer

No, because it contains living organisms.

Answer

Yes, because it contains nitrates, which are used to assess the health of a water supply.

Question 10

What two factors directly lead to unhealthy levels of nitrates in the water?

Accepted Answer

Fertilizer Runoff

Accepted Answer

Animal Waste Runoff

Answer

burning fossil fuels

Answer

Acid rain

Question 11

Below is a chart of test results from water samples taken at various sites. Which of the following best describes the results from these sites?

Accepted Answer

Site 5 is unhealthy because the temperature is too high and the dissolved oxygen is too low.

Answer

Site 1 is unhealthy because of its dissolved oxygen levels are too high.

Answer

Site 3 and 4 are unhealthy because the temperature is too low.

Answer

Site 2 is unhealthy because the pH is too high and the temperature is too low.

Question 12

Which of the following can be concluded based on the data?

Accepted Answer

Sites 5 through 8 are most healthy because they have a high % of bioindicators.

Answer

Sites 1 and 13 are most concerning because they have low % of bioindicators.

Answer

Sites 5 through 8 are most concerning because they have a high % of bioindicators.

Answer

Site 12 is most healthy because it has the lowest % of bioindicators.

Question 13

Which beaker in the image has the highest turbidity?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 14

Which of the following can directly increase water turbidity?

Accepted Answer

Increased soil erosion and algae growth.

Answer

Decreased temperature and sewage dumping

Answer

Algae growth and increased pH.

Answer

Fertilizer runoff and increased DO.

Question 15

Which is a true statement of the diagram above?

Accepted Answer

As temperature increases dissolved oxygen decreases

Answer

As temperature increases dissolved oxygen increases

Answer

As temperature decreases dissolved oxygen decreases

Answer

Noe of the above

Question 16

How does acid rain affect the pH of a stream or lake?

Accepted Answer

The pH decreases.

Answer

The pH increases.

Answer

Acid rain does not affect pH.

Answer

It causes an explosion.

Question 17

Which picture shows water pollution caused by fertilizer run-off?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 18

Which of the following is an effect of excess fertilizer washing into streams and lakes?

Accepted Answer

algae "blooms", leading to lower oxygen

Answer

the pH is too low for plants and animals

Answer

cooler water holds more oxygen

Answer

increased sediment reduces oxygen

Question 19

Algal blooms can occur when untreated sewage ends up in freshwater systems like rivers and lakes. Biological waste, which is found in sewage may contain the following: (Select TWO that apply)

Accepted Answer

Nitrogen

Accepted Answer

Phosphorus

Answer

Argon

Answer

Oxygen

Question 20

The rapid growth of algae, called an algae bloom, can lead to the formation of dead zones that cannot sustain aquatic life. This is mainly because the algae bloom lowers the amount of...

Accepted Answer

dissolved oxygen

Answer

chemical pollutants

Answer

freshwater runoff

Answer

nutrients

Question 21

The presence of pollution intolerant macroinvertebrates like stonefly and caddisfly indicates

Accepted Answer

good quality water

Answer

poor quality water

Question 22

______________ ______________ is produced when fuels containing sulfur are burned in the presence of oxygen.

Accepted Answer

Sulfur dioxide

Answer

Carbon dioxide

Answer

Carbon monoxide

Answer

Greenhouse gas

Question 23

Source of carbon monoxide

Accepted Answer

Incomplete combustion of fossil fuels

Answer

Combustion of fossil fuels

Answer

Decomposition of plant and animal matters

Answer

Photochemical reaction of CO₂

Question 24

Which two primary pollutants most often result in acid rain?

Accepted Answer

sulfuric dioxide and nitric oxide

Answer

carbon monoxide and VOCs

Answer

ZEVs and VOCs

Answer

carbonic acid and citric acid

Question 25

CFC's cause harm to our

Accepted Answer

Ozone Layer

Answer

Troposphere

Answer

Inversion Layer

Answer

Carbon Dioxide

Question 26

The ozone layer protects us from

Accepted Answer

UV rays

Answer

CFCs

Answer

Increased atmospheric heat

Answer

Decreased atmospheric heat

Question 27

What is the main cause of air pollution?

Accepted Answer

burning fossil fuels

Answer

plowing fields and releasing dust

Answer

using solar power

Answer

using water power

Question 28

Most scientists agree that Global warming/climate change is due to

Accepted Answer

Greenhouse gases

Answer

Nitric and sulfuric acids

Answer

CFCs

Answer

Ozone depletion

Question 29

Which pair below are the two main sources of air pollution in urban (populated) areas?

Accepted Answer

vehicles, industries

Answer

vehicles, volcanoes

Answer

Industries, agriculture

Answer

All of the above

Question 30

Which is the smallest amount of a pollutant?

Accepted Answer

1 ppt (parts per trillion)

Answer

1 ppm (parts per million)

Answer

1 ppb (parts per billion)

Answer

1 part per thousand

Question 31

What is the concentration of a solution in parts per million if 0.02 grams of NaCl is dissolved in 1000 grams of water?

Accepted Answer

20 ppm

Answer

2 ppm

Answer

200 pm

Answer

0.2 ppm

Question 32

Which of the following concentrations is higher?

Accepted Answer

200 ppm

Answer

0.2 ppm

Answer

2.2 ppm

Answer

20.2 ppm

Question 33

What is the concentration of solution (in ppm) made up of 0.005 grams of solute in 350 grams of solution?

Accepted Answer

14.3 ppm

Answer

12.1 ppm

Answer

1.4 ppm

Answer

9.8 ppm

Question 34

There are 50 mg of salt in 8,000 mg of water. Write them in ppm.

Accepted Answer

6,250ppm

Answer

160ppm

Answer

40,000ppm

Answer

4,000ppm

Question 35

Which is the highest concentration of lead?

Accepted Answer

5 ppm

Answer

0.5 ppm

Answer

5 ppb

Answer

0.5 ppb

Question 36

Which of the following statement about the LD50 is correct?

Accepted Answer

LD50 is a measurement to COMPARE the toxicity with other substances

Answer

The more toxic a substance is, the higer its LD50 would be

Answer

LD50 is measured by testing toxins on humans

Answer

LD50 stands for Lethal dose 50 mg/L

Question 37

What is more dangerous? An LD50 of ...

Accepted Answer

0.04 ppm

Answer

1.29 ppm

Answer

1.04 ppm

Answer

0.40 ppm

Question 38

Arrange the following chemicals from most to least toxic: dioxin, nicotine, botulinum toxin A, dieldren.

Accepted Answer

Botulinum toxin A, dioxin, nicotine, dieldren

Answer

Dieldren, dioxin, nicotine, botulinum toxin A

Answer

Dieldren, nicotine, dioxin, botulinum toxin A

Answer

Botulinum toxin A, nicotine, dioxin, dieldren

Question 39

Lethal dose (LD₅₀) values are determined by the amount of a substance that:

Accepted Answer

kills at least 50% of the test population exposed to the substance

Answer

kills at least 50 individuals of the test population exposed to the substance

Answer

kills a test population when given at least 50 ml of the substance

Answer

kills a test population when given at least 50g of the substance

Question 40

What is the LD50 for the toxin tested in this experiment?

Accepted Answer

25

Answer

6

Answer

12.5

Answer

50

Answer

100

Question 41

Arsenic has an LD₅₀ of 15mg/kg. How many mg of arsenic is toxic to an individual who weighs 100 kg?

Accepted Answer

1,500 mg

Answer

15 mg

Answer

6.7 mg

Answer

0.15 mg

Question 42

Which substance is least toxic?

Accepted Answer

vitamin A (LD50 = 30 g/kg)

Answer

chlorine (LD50 = 850 mg/kg)

Answer

aspirin (LD50 = 200 mg/kg)

Answer

cola (LD50 = 140 mg/kg)

Question 43

What is the best estimate for the LD50 of the toxin in this graph?

Accepted Answer

3.7

Answer

3.5

Answer

5

Answer

100

Question 44

How do scientists determine the toxicity of a chemical

Accepted Answer

LD50 - expose it to many lab animals at different concentrations

Answer

wait for reports of death and mayham

Answer

Its chemical structure

Answer

which country it is from

Question 45

Plastic bottle is example of _________________

Accepted Answer

Non-Biodegradable

Answer

Biodegradable

Question 46

Peel of fruits and vegetables is example of _________________

Accepted Answer

Biodegradable

Answer

Non-Biodegradable

Question 47

Biodegrade means...?

Accepted Answer

able to be broken down by microbes in nature

Answer

the process of creating algae based plastics

Answer

constructed by using biological materials like algae

Answer

able to be turned into vitrimirs

Question 48

Which method uses natural or genetically engineered plants to absorb, filter, and remove contaminants from soil and water?

Accepted Answer

phytoremediation

Answer

physical methods

Answer

nanomagnets

Answer

chemical methoda

Question 49

An air pollution prevention mechanism found in vehicles.

Accepted Answer

catalytic converter

Answer

combustion chamber

Answer

electrostatic precipitator

Answer

scrubber

Question 50

What can humans do to reduce the effects of acid rain?

Accepted Answer

All of the Answers are Correct

Answer

Develop Alternate Energy Sources (Solar Power, Wind Energy)

Answer

Use Less Energy

Answer

Stop Burning Fossil Fuels

Question 51

Which of the following would increase the rate of biodegradation?

Accepted Answer

increase temperature

Answer

decrease temperature

Answer

remove bacteria

Answer

remove nutrients

Question 52

Which of the following would decrease concentration of pollutants?

Accepted Answer

dilution

Answer

deposition

Answer

biomagnification

Answer

inhalation

Question 53

One way to reduce pollution from coal burning plants is to install...

Accepted Answer

smokestack scrubbers.

Answer

cooling systems.

Answer

air filters.

Question 54

Sanitary landfills have __________ to prevent leachate from getting into groundwater.

Accepted Answer

liners

Answer

daily layers of soil

Answer

garbage

Answer

clay soils beneath landfill

Question 55

What is bio-remediation?

Accepted Answer

Process where organic things are used to break down pollution

Answer

When you use biology to meditate

Answer

When you amend biological things

Answer

Process where you watch bacteria break things down

Question 56

What can NOT be added into the compost bin ?

Accepted Answer

expired medicine and glass items

Answer

soiled napkins

Answer

egg shells

Answer

Fruit scraps

Question 57

Which of the following technologies uses light to break down materials such as plastics?

Accepted Answer

photolysis

Answer

biodegradation

Answer

phytoremediation

Answer

biomagnification

Question 58

What is the manipulated variable in this experiment?

Accepted Answer

temperature

Answer

dissolved oxygen

Answer

mg/liter

Answer

oxygen solubility in water at various temperatures

Question 59

What is the responding variable in this experiment?

Accepted Answer

Water Quality

Answer

Location of test

Question 60

Which statement is expressing an economic perspective?

Accepted Answer

How expensive is it to clean up the chemical pollution?

Answer

Which is more important, people's wants or wildlife's needs?

Answer

Are laws and regulations in place that prevent dumping?

Answer

What is causing this algae to form on the lake?

Question 61

Which statement is expressing an ethical perspective?

Accepted Answer

Which is more important, people's wants or wildlife's needs?

Answer

How expensive is it to clean up the chemical pollution?

Answer

Are laws and regulations in place that prevent dumping?

Answer

What is causing this algae to form on the lake?

Question 62

Which activity shown in the map is a main cause of algae blooms?

Accepted Answer

Waste water (sewage) pipes from the village leading to the river.

Answer

Emissions from the sawmill and trucks

Answer

Oxygen gas from photosynthetic plants

Answer

Fumes from the chimney of the factory.

Question 63

Select all the likely causes of acid rain from the illustration

Accepted Answer

automobile exhaust

Accepted Answer

factory exhaust

Answer

pesticides

Answer

fertilizers

Answer

animal waste

Question 64

Select all the likely causes of heavy metal contamination from the illustration

Accepted Answer

landfill

Accepted Answer

hazardous waste dumpsite

Accepted Answer

leaking underground storage tank

Answer

fertilizers

Answer

animal waste

Envirochemistry Review #2

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