Both the presence of banded iron formations and red beds are evidence that the atmosphere and hydrosphere changed
from oxidizing to reducing in the Proterozoic.
a. True
b. False
False
You might also like to view...
The original source of energy contained in fossil fuels is
A. solar energy. B. seismic energy. C. geothermal energy. D. nuclear energy.
Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle.
A) Likely
B) Unlikely
Sponges: a. are deposit feeders
b. have crudely developed digestive, circulatory, respiratory and nervous systems. c. are found only in the deep ocean. d. have a skeletal framework.
Which of the following is true about Pluto?
A. Astronomers recently classified it to dwarf-planet status. B. It is similar to a number of objects farther out from the Solar System. C. Its orbit is very elliptical. D. It is a small icy object, even smaller than Earth's Moon. E. All of these choices are correct.