the Tootingimpact crater on Mars was named after the London suburb of the same name because the discoverer "thought [his] mum and brother would get a kick out of having their home town paired with a land form on Mars"?
the Tolstoj crater, a 400-km (240 mile) wide impact crater on the planet Mercury has an extensive, and remarkably well-preserved, radially-lineated ejecta blanket?
Question 2: Since craters are caused by ________, they are nearly
always circular – only very low-angle impacts cause significantly
elliptical craters.
Question 6: In most common usage, the term is used for the approximately
circular depression in the surface of a planet, moon or
other solid body in the ________, formed by the hyper-velocityimpact of a smaller body
with the surface.
Question 7: On Earth, ignoring the
slowing effects of travel through the atmosphere, the lowest impact
velocity with an object from space is equal to the gravitational ________
of about 11 km/s.
Question 8: In simple craters,
the original excavation cavity is overlain by a lens of collapse ________, ejecta and melt rock,
and a portion of the central crater floor may sometimes be
flat.
Question 9: Indeed, the ________ of some material involved
in the formation of impact craters is many times higher than that
generated by high explosives.
Question 10: Impact craters provide the dominant landforms on many solid
Solar System objects including the ________, Mercury, Callisto, Ganymede and most small moons and asteroids.
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