Q: Greg is an environmental scientist. He wants to know how earth's atmosphere differed in two different time. To that end, he selected two time periods, time A and time B. Time A is set in the year one thousand when using fossil fuels was not very common. Time B is set in the year two thousand when fossil fuels are used in large quantities. In which time earth's temperature would be higher, time A or time B?
A: time B

Q: Michael and Robert are both performing a chemistry experiment. The reaction they are performing uses alkenes and hydrogen as reactants. Michael performs the experiment without any additional materials, while Robert performs the experiment while using a platinum catalyst. Who will have a lower reaction rate in their experiments?
A: Michael

Q: A scientists has discovered two new types of radiation. He notes that radiation type A has the ability to break away atoms from molecules, while radiation type B simply causes them to vibrate. Will introducing radiation type B to water cause the temperature of the water to increase or decrease?
A: increase

Q: Woodland had two nearby fish hatcheries. Pine hatchery had great result the past few years because they found a way to reduce ammonia water toxicity. Spruce hatchery has big ammonia toxicity problems and hadn't find a way to remediate them. Which hatchery found fewer fish with altered metabolisms?
A:
Pine