A sterilizing impact is one during which
A) all life on a planet is completely destroyed
B) most life on the surface of a planet is destroyed but life in the oceans or beneath the surface might survive
C) a planet is fragmented into pieces
D) life on a planet is rendered incapable of reproduction
B
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Spherical Mirrors: A concave mirror having a focal length of magnitude 5.0 cm forms an image 4.0 cm behind the mirror. Where is the object for this image?
A. 2.2 cm in front of the mirror B. 2.2 cm behind the mirror C. 9.0 cm in front of the mirror D. 1.0 cm behind the mirror E. 20 cm behind the mirror
What is the approximate age of Earth?
A. 1,000,000 years B. 13.7 billion years C. 6,000 years D. 4.5 billion years E. 4.5 million years
How did Hubble use the cosmological redshift to determine distance?
What will be an ideal response?
Start on the home screen of the interactive figure, with "Elevation is off." Then turn elevation on, and compare what you see. You may wish to switch back and forth between elevation on and off a few times. Then select the statements below that are true. Note: Features such as impact craters that are actually round in shape are distorted into oval shapes at mid- to high-latitudes by map projection effects.
A. The icy polar caps have the highest elevations of any features on Mars. B. There is a long, deep canyon that stretches along a region close to Mars's equator. C. Most of the northern hemisphere has much lower elevation than the southern hemisphere. D. The northern hemisphere is more heavily cratered than the southern hemisphere. E. There is a large, roundish region of low-elevation in the southern hemisphere. F. Several large volcanoes are found near or somewhat north of Mars's equator.