Interglacial–glacial period climate cycles are often referred to as appearing saw-toothed, with an abrupt change followed by a more gradual change. When do we see an abrupt change: when going from interglacial to glacial times or when going from glacial to interglacial times? When do we see a gradual change?
Examine Figure 18.2. The Vostok ice core is 3310 m (10,860 ft) long. The full record extends back to 422,000 years before the present. The figure shows CO2 in parts per million (ppm) and temperature anomalies in Celsius degrees.
What will be an ideal response?
The abrupt change is seen going from glacial to interglacial conditions, while the return to glacial conditions is more gradual.
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Which of the following describes the cause of a mirage?
A. thin layer of moist air near the ground B. reflection of light from a hot surface C. bending of light by air of different densities D. scattering of light by air molecules
The pH scale is a quantitative representation of the relative amounts of ________
A) water and carbon dioxide molecules in solution B) hydrogen and polar water molecules in solution C) alkaline and basic ions in solution D) hydrogen and oxygen ions in solution E) hydrogen and hydroxyl ions in solution
How can granite and many other dense igneous and metamorphic rocks be groundwater reservoirs? What will be an ideal response?
Projected climate change threatens aquatic biodiversity and ecosystem services, partly by contributing to ____.
A. an increase in carbon storage in oceans B. spread of tropical diseases C. decreased salinity of water D. rising sea levels E. UV radiation from ozone depletion