Background: Unfortunately, the layer of good ozone is being destroyed by air pollution. The chief culprits are chlorine and bromine gases. They are released in aerosol sprays, coolants, and other products. Loss of ozone has created an ozone hole over Antarctica. Ozone depletion results in higher levels of UV radiation reaching Earth. In humans, this increases skin cancers and eye cataracts. It also disturbs the nitrogen cycle, kills plankton, and disrupts ocean food webs. The total loss of the ozone layer would be devastating to most life. Its rate of loss has slowed with restrictions on pollutants, but it is still at risk.

Situation: Russian research spent most of their time in Antarctica to study the loss of ozone in the atmosphere. The Canadian team went north of the Polar Circle, close to the North Pole to do the same thing. They spent several months there.

Question: Which team was closer to the ozone hole in the atmosphere?
Answer: Russian

Situation: Russian research spent most of their time in Antarctica to study the loss of ozone in the atmosphere. The Canadian team went north of the Polar Circle, close to the North Pole to do the same thing. They spent several months there.

Question: Which team was farther from the ozone hole in the atmosphere?
Answer: Canadian

Situation: Russian research spent most of their time in Antarctica to study the loss of ozone in the atmosphere. The Canadian team went north of the Polar Circle, close to the North Pole to do the same thing. They spent several months there.

Question: Which team observed higher levels of UV radiation reaching Earth?
Answer: Russian

Situation: Russian research spent most of their time in Antarctica to study the loss of ozone in the atmosphere. The Canadian team went north of the Polar Circle, close to the North Pole to do the same thing. They spent several months there. The Canadian team didn't find any ozone holes at the North Pole.

Question: Which team didn't observe higher levels of UV radiation reaching Earth?
Answer: Canadian

Situation: Russian research spent most of their time in Antarctica to study the loss of ozone in the atmosphere. The Canadian team went north of the Polar Circle, close to the North Pole to do the same thing. They spent several months there. The Canadian team didn't find any ozone holes at the North Pole.

Question: Which team was more exposed to skin cancers?
Answer: Russian

Situation: Russian research spent most of their time in Antarctica to study the loss of ozone in the atmosphere. The Canadian team went north of the Polar Circle, close to the North Pole to do the same thing. They spent several months there. The Canadian team didn't find any ozone holes at the North Pole.

Question: Which team was less exposed to skin cancers?
Answer: Canadian

Situation: Russian research spent most of their time in Antarctica to study the loss of ozone in the atmosphere. The Canadian team went north of the Polar Circle, close to the North Pole to do the same thing. They spent several months there. The Canadian team didn't find any ozone holes at the North Pole.

Question: Which team was less exposed to eye cataracts?
Answer: Canadian

Situation: Russian research spent most of their time in Antarctica to study the loss of ozone in the atmosphere. The Canadian team went north of the Polar Circle, close to the North Pole to do the same thing. They spent several months there. The Canadian team didn't find any ozone holes at the North Pole.

Question: Which team was more exposed to eye cataracts?
Answer: Russian

Situation: Russian research spent most of their time in Antarctica to study the loss of ozone in the atmosphere. The Canadian team went north of the Polar Circle, close to the North Pole to do the same thing. They spent several months there. The Canadian team didn't find any ozone holes at the North Pole.

Question: Which team observed the disruption of the nitrogen cycle?
Answer: Russian

Situation: Russian research spent most of their time in Antarctica to study the loss of ozone in the atmosphere. The Canadian team went north of the Polar Circle, close to the North Pole to do the same thing. They spent several months there. The Canadian team didn't find any ozone holes at the North Pole.

Question: Which team didn't observe the disruption of the nitrogen cycle?
Answer: Canadian

Situation: Two researchers studied air quality over the North Pole, and over Antarctica. Dan was more fond of the south pole, so he studied Antarctica, while Colt liked reading about the North Pole.

Question: Which researcher learned more about chlorine gases?
Answer: Dan

Situation: Two researchers studied air quality over the North Pole, and over Antarctica. Dan was more fond of the south pole, so he studied Antarctica, while Colt liked reading about the North Pole.

Question: Which researcher learned less about chlorine gases?
Answer: Colt

Situation: Two researchers studied air quality over the North Pole, and over Antarctica. Dan was more fond of the south pole, so he studied Antarctica, while Colt liked reading about the North Pole.

Question: Which researcher learned less about bromine gases?
Answer: Colt

Situation: Two researchers studied air quality over the North Pole, and over Antarctica. Dan was more fond of the south pole, so he studied Antarctica, while Colt liked reading about the North Pole.

Question: Which researcher learned more about bromine gases?
Answer: Dan

Situation: Two researchers studied air quality over the North Pole, and over Antarctica. Dan was more fond of the south pole, so he studied Antarctica, while Colt liked reading about the North Pole.

Question: Which researcher learned more about aerosol sprays?
Answer: Dan

Situation: Two researchers studied air quality over the North Pole, and over Antarctica. Dan was more fond of the south pole, so he studied Antarctica, while Colt liked reading about the North Pole.

Question: Which researcher learned less about aerosol sprays?
Answer: Colt

Situation: Two researchers studied air quality over the North Pole, and over Antarctica. Dan was more fond of the south pole, so he studied Antarctica, while Colt liked reading about the North Pole.

Question: Which researcher learned less about aerosol coolants?
Answer: Colt

Situation: Two researchers studied air quality over the North Pole, and over Antarctica. Dan was more fond of the south pole, so he studied Antarctica, while Colt liked reading about the North Pole.

Question: Which researcher learned more about aerosol coolants?
Answer: Dan

Situation: Two researchers studied air quality over the North Pole, and over Antarctica. Dan was more fond of the south pole, so he studied Antarctica, while Colt liked reading about the North Pole.

Question: Which researcher learned more about higher levels of UV radiation reaching Earth?
Answer: Dan

Situation: Two researchers studied air quality over the North Pole, and over Antarctica. Dan was more fond of the south pole, so he studied Antarctica, while Colt liked reading about the North Pole.

Question: Which researcher learned less about higher levels of UV radiation reaching Earth?
Answer: Colt

Situation: Two neighboring habitable planets from the same solar system, planet U and planet N, had Earth-like atmospheres. The inhabitants of planet U destroyed the ozone layer by their actions, while their neighboring planet N didn't.

Question: Which planet produced more air pollution?
Answer: planet U

Situation: Two neighboring habitable planets from the same solar system, planet U and planet N, had Earth-like atmospheres. The inhabitants of planet U destroyed the ozone layer by their actions, while their neighboring planet N didn't.

Question: Which planet produced less air pollution?
Answer: planet N

Situation: Two neighboring habitable planets from the same solar system, planet U and planet N, had Earth-like atmospheres. The inhabitants of planet U destroyed the ozone layer by their actions, while their neighboring planet N didn't.

Question: Which planet released more chlorine gas in their atmosphere?
Answer: planet U

Situation: Two neighboring habitable planets from the same solar system, planet U and planet N, had Earth-like atmospheres. The inhabitants of planet U destroyed the ozone layer by their actions, while their neighboring planet N didn't.

Question: Which planet released less chlorine gas in their atmosphere?
Answer: planet N

Situation: Two neighboring habitable planets from the same solar system, planet U and planet N, had Earth-like atmospheres. The inhabitants of planet U destroyed the ozone layer by their actions, while their neighboring planet N didn't.

Question: Which planet released less bromine gas in their atmosphere?
Answer: planet N

Situation: Two neighboring habitable planets from the same solar system, planet U and planet N, had Earth-like atmospheres. The inhabitants of planet U destroyed the ozone layer by their actions, while their neighboring planet N didn't.

Question: Which planet released more bromine gas in their atmosphere?
Answer: planet U

Situation: Two neighboring habitable planets from the same solar system, planet U and planet N, had Earth-like atmospheres. The inhabitants of planet U destroyed the ozone layer by their actions, while their neighboring planet N didn't.

Question: Which planet had inhabitants that used more aerosol sprays?
Answer: planet U

Situation: Two neighboring habitable planets from the same solar system, planet U and planet N, had Earth-like atmospheres. The inhabitants of planet U destroyed the ozone layer by their actions, while their neighboring planet N didn't.

Question: Which planet had inhabitants that used fewer aerosol sprays?
Answer: planet N

Situation: Two neighboring habitable planets from the same solar system, planet U and planet N, had Earth-like atmospheres. The inhabitants of planet U destroyed the ozone layer by their actions, while their neighboring planet N didn't.

Question: Which planet had inhabitants that used fewer aerosol coolants?
Answer: planet N

Situation: Two neighboring habitable planets from the same solar system, planet U and planet N, had Earth-like atmospheres. The inhabitants of planet U destroyed the ozone layer by their actions, while their neighboring planet N didn't.

Question: Which planet had inhabitants that used more aerosol coolants?
Answer: planet U

Situation: Two teams of researchers studied the environment in Antarctica. Team Black studied air pollution and the ozone layer, Team Red studied the water.

Question: Which team observed that the layer of ozone is being destroyed by air pollution?
Answer: Black

Situation: Two teams of researchers studied the environment in Antarctica. Team Black studied air pollution and the ozone layer, Team Red studied the water.

Question: Which team didn't observe that the layer of ozone is being destroyed by air pollution?
Answer: Red

Situation: Two teams of researchers studied the environment in Antarctica. Team Black studied air pollution and the ozone layer, Team Red studied the water.

Question: Which team didn't observe that the culprit are chlorine gasses?
Answer: Red

Situation: Two teams of researchers studied the environment in Antarctica. Team Black studied air pollution and the ozone layer, Team Red studied the water.

Question: Which team observed that the culprit are chlorine gasses?
Answer: Black

Situation: Two teams of researchers studied the environment in Antarctica. Team Black studied air pollution and the ozone layer, Team Red studied the water.

Question: Which team observed that the culprit are bromine gasses?
Answer: Black

Situation: Two teams of researchers studied the environment in Antarctica. Team Black studied air pollution and the ozone layer, Team Red studied the water.

Question: Which team didn't observe that the culprit are bromine gasses?
Answer: Red

Situation: Two teams of researchers studied the environment in Antarctica. Team Black studied air pollution and the ozone layer, Team Red studied the water.

Question: Which team didn't observe that aerosol sprays are being released into the atmosphere?
Answer: Red

Situation: Two teams of researchers studied the environment in Antarctica. Team Black studied air pollution and the ozone layer, Team Red studied the water.

Question: Which team observed that aerosol sprays are being released into the atmosphere?
Answer: Black

Situation: Two teams of researchers studied the environment in Antarctica. Team Black studied air pollution and the ozone layer, Team Red studied the water.

Question: Which team observed higher levels of UV reaching Earth?
Answer: Black

Situation: Two teams of researchers studied the environment in Antarctica. Team Black studied air pollution and the ozone layer, Team Red studied the water.

Question: Which team did not observe higher levels of UV reaching Earth?
Answer: Red

Situation: Planet Y and planet X were two inhabited planets in a nearby solar system. People from Planet X were living in harmony with nature, and didn't hurt the environment in any way. People on planet Y generated lots of air pollution, and destroyed their ozone layer by using inappropriate substances.

Question: Which planet had their atmosphere destroyed by air pollution?
Answer: planet Y

Situation: Planet Y and planet X were two inhabited planets in a nearby solar system. People from Planet X were living in harmony with nature, and didn't hurt the environment in any way. People on planet Y generated lots of air pollution, and destroyed their ozone layer by using inappropriate substances.

Question: Which planet didn't have their atmosphere destroyed by air pollution?
Answer: planet X

Situation: Planet Y and planet X were two inhabited planets in a nearby solar system. People from Planet X were living in harmony with nature, and didn't hurt the environment in any way. People on planet Y generated lots of air pollution, and destroyed their ozone layer by using inappropriate substances.

Question: Which planet has more chlorine gases in their atmosphere?
Answer: planet Y

Situation: Planet Y and planet X were two inhabited planets in a nearby solar system. People from Planet X were living in harmony with nature, and didn't hurt the environment in any way. People on planet Y generated lots of air pollution, and destroyed their ozone layer by using inappropriate substances.

Question: Which planet has fewer chlorine gases in their atmosphere?
Answer: planet X

Situation: Planet Y and planet X were two inhabited planets in a nearby solar system. People from Planet X were living in harmony with nature, and didn't hurt the environment in any way. People on planet Y generated lots of air pollution, and destroyed their ozone layer by using inappropriate substances.

Question: Which planet used more coolants?
Answer: planet Y

Situation: Planet Y and planet X were two inhabited planets in a nearby solar system. People from Planet X were living in harmony with nature, and didn't hurt the environment in any way. People on planet Y generated lots of air pollution, and destroyed their ozone layer by using inappropriate substances.

Question: Which planet used fewer coolants?
Answer: planet X

Situation: Planet Y and planet X were two inhabited planets in a nearby solar system. People from Planet X were living in harmony with nature, and didn't hurt the environment in any way. People on planet Y generated lots of air pollution, and destroyed their ozone layer by using inappropriate substances.

Question: Which planet used fewer aerosol sprays?
Answer: planet X

Situation: Planet Y and planet X were two inhabited planets in a nearby solar system. People from Planet X were living in harmony with nature, and didn't hurt the environment in any way. People on planet Y generated lots of air pollution, and destroyed their ozone layer by using inappropriate substances.

Question: Which planet used more aerosol sprays?
Answer: planet Y

Situation: Planet Y and planet X were two inhabited planets in a nearby solar system. People from Planet X were living in harmony with nature, and didn't hurt the environment in any way. People on planet Y generated lots of air pollution, and destroyed their ozone layer by using inappropriate substances.

Question: Which planet disturbed their nitrogen cycle?
Answer: planet Y

Situation: Planet Y and planet X were two inhabited planets in a nearby solar system. People from Planet X were living in harmony with nature, and didn't hurt the environment in any way. People on planet Y generated lots of air pollution, and destroyed their ozone layer by using inappropriate substances.

Question: Which planet didn't alter their nitrogen cycle?
Answer: planet X