What role does the process of mass extinction play in the evolution of life? What will be an ideal response?
When one species becomes extinct, that group’s habitat becomes available for another organism.
After mass extinctions, surviving organisms can rapidly expand and diversify, occupying the
niches that were temporarily vacant. A good example of this is the diversification of mammals
after the demise of dinosaurs at the end of the Mesozoic.
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Which of the following factors is responsible for keeping a planet's atmosphere close to its surface?
A. pressure B. cloud cover C. gravity D. moisture
Quartz has a specific gravity of about 2.65. A 5-gallon bucket of water weighs 40 pounds. How much would a 5-gallon volume of solid quartz weigh?
What will be an ideal response?
Where in the Earth's atmosphere are chemicals most likely to be dispersed and present for a long period of time?
A) thermosphere B) mesosphere C) stratosphere D) ozone layer E) troposphere Read the accompanying scenario and answer the following questions. The human body has the capacity to do work or engage in energy each day. Answer the following questions about the energy you have as you run a triathlon.
Which of the four spheres of Earth is the most extensive?
A) Geosphere B) Atmosphere C) Hydrosphere D) Biosphere