SCI 200-UNIT 4 CHALLENGE 2 QUESTIONS WITH CORRECT ANSWERS

Which of the following is a scientific observation that supports the idea of a warming planet? a.) Earth's climate depends on the amount of plant and animal life. b.) Earth has been warming up slower than any other historical global temperature increase. c.) Historically, the earth's climate cycles between warmer and cooler periods. d.) There have only been warmer periods throughout Earth's history. Correct Answer c.) Historically, the earth's climate cycles between warmer and cooler periods. Which of the following statements about the history of climate change on Earth is true? a.) Current climate change is largely due to increases in greenhouse gases in the atmosphere. b.) At the end of the last Ice Age, the global temperature was around 25 degrees cooler than it is today. c.) Changes in the Earth's atmosphere today are relatively large compared to atmospheric changes on early Earth. d.) In the past, these temperature changes have been sudden and species did not have the time to adapt. Correct Answer a.) Current climate change is largely due to increases in greenhouse gases in the atmosphere. Of the options below, which is used by scientists as evidence of man-made climate change? a.) The growing number of endangered species b.) The descending sea levels c.) The steep increase in the incidence and severity of skin cancer d.) The melting of glaciers and polar ice caps Correct Answer d.) The melting of glaciers and polar ice caps