Compare the changes in Earth's past and present atmosphereEarth's early atmosphereEarth's atmosphere todayTraces ofnitrogen,ammonia,methaneTraces ofcarbon dioxide,water vapour,ammonia,methane4%water vapour21%oxygen95%78%carbon dioxidenitrogenAverage surfacetemperature above 400°CAverage surfacetemperature 20 °C

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Answered: Compare the changes in Earth's past and…

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter18: Life's Origin And Early Evolution

Section: Chapter Questions

Problem 1SA: An abundance of___________ in Earths early atmosphere would have prevented the spontaneous assembly...

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Changes in the Air To assess the impact of human activity on the carbon dioxide level in Earth's atmosphere, it helps to take a long view. One useful data set comes from deep core samples of Antarctic ice. The oldest ice core that has been fully analyzed dates back a bit more than 400,000 years. Air bubbles trapped in the ice provide information about the gas content in Earth's atmosphere at the time the ice formed. Combining ice core data with more recent direct measurements of atmospheric carbon dioxideas in FIGURE 46.20can help scientists put current changes in the atmospheric carbon dioxide into historical perspective. FIGURE 46.20 Changes in atmospheric carbon dioxide levels (in parts per million). Direct measurements began in 1980. Earlier data are based on ice cores. 4. Was the rise in the carbon dioxide level between 1800 and 1975 larger or smaller than the rise between 1980 and 2013?
Changes in the Air To assess the impact of human activity on the carbon dioxide level in Earth's atmosphere, it helps to take a long view. One useful data set comes from deep core samples of Antarctic ice. The oldest ice core that has been fully analyzed dates back a bit more than 400,000 years. Air bubbles trapped in the ice provide information about the gas content in Earth's atmosphere at the time the ice formed. Combining ice core data with more recent direct measurements of atmospheric carbon dioxideas in FIGURE 46.20can help scientists put current changes in the atmospheric carbon dioxide into historical perspective. FIGURE 46.20 Changes in atmospheric carbon dioxide levels (in parts per million). Direct measurements began in 1980. Earlier data are based on ice cores. The industrial revolution occurred around 1800. What was the trend in carbon dioxide level in the 800 years prior to this event? What about in the 175 years after it?
Scientists study bubbles trapped in ancient glacial ice todetermine how concentrations of nitrogen and carbondioxide gas have changed over time. However, bubblesin glacial ice cannot provide information about changesin phosphorus. Explain why air samples are not usefulfor this purpose, and propose an alternative method tostudy how the amount of phosphorus in a region haschanged over time.
Explain how nitrogen gets from the atmosphere into aplant’s body.
1Which of the following is NOT a consequence of global climate change? coral bleaching more ice at the North and South Poles increases in diseases such as malaria and dengue fever rising sea levels 2How do scientists determine the atmospheric levels of carbon dioxide that existed on Earth hundreds or thousands of years ago? They deduce it from the carbon dioxide content of fossil fuels. They measure it from bubbles of gas trapped in Antarctic ice cores. They estimate it from the numbers of carbon-based life forms that existed over time. They calculate carbon dioxide levels from the temperature records. Scientists do not know the atmospheric levels of carbon dioxide thousands of years ago. 3The two factors that are responsible for the climate of an area are: the number and size of different kinds of species the position of the area in relation to island chains the elevation of the area, and its tree cover the amount of rainfall and temperature. the…
In what natural forms is carbon found? Name three ways carbon isreturned to the atmosphere and a way it is fixed into organiccompounds.
Describe two processes where carbon exists the atmosphere.
Analyze the following data table indicating the amount of Carbon Dioxide in Earth's atmosphere at certain periods of Earth's history. Millions of Years Ago 500 300 200 100 Carbon Dioxide Level (in parts per million) 6000 500 2000 1750 Identify which of the time periods would have been the warmest and describe how the concentration of greenhouse gases like carbon dioxide influence the temperature of Earth's atmosphere.
Explain how living things recycle oxygen in Earth’s atmosphere.
If 99% of all gases in the atmosphere (excluding water vapor) are nitrogen and oxygen, why aren’t climate researchers focused on changes in the concentrations of these gases?
An abundance of___________ in Earths early atmosphere would have prevented the spontaneous assembly of organic compounds on early Earth. a. hydrogen b. methane c. oxygen d. nitrogen
The _______________ is open ocean from the shoreline to a depth of 200 m. (a) benthic environment (b) intertidal zone (c) neritic province (d) oceanic province (e) aphotic region

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