Imagine you are an astronaut, landing on an alien world. Looking out your spacecraft window, you see a world that looks very much like Earth. You notice a disappearing stream and two sinkholes
Based on your training in Earth science, make a prediction about the rock type you would find in the area where you have landed, and justify your prediction. Make a second prediction about the composition of the atmosphere on the new planet.
What will be an ideal response?
Answer: Disappearing streams and potholes are typical landscape features in karst topography on Earth, and karst topography forms on Earth where groundwater dissolves limestone. Groundwater can accomplish this task because of carbonic acid, which can result from the interaction of rain with carbon dioxide in the air. So the air of the new planet may contain carbon dioxide or a similar acid (once dissolved in water) as well as water vapor. The rock type may be limestone, or a similarly soluble rock type–like rock salt or rock gypsum, perhaps.
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The organisms that replaced Paleozoic corals as the major reef builder in the Mesozoic were
a. scleractinians. d. cephalopods. b. rudist bivalves. e. gastropods. c. oysters
One of the greatest success stories of the positive impact of chemistry research and environmental policies and regulations relates to
A) nitrogen oxides and the control of acid precipitation. B) CFCs and the destruction of the ozone. C) the reduction of ozone pollution over major cities in North America. D) the use of fossil fuels and the reversal of global climate changes.
Archaea is one of the three major branches of life, along with animal and plant.
Answer the following statement true (T) or false (F)