What are the pieces of evidence used to support the theory that dinosaurs became extinct as a result of a comet impact about 65 million years ago? choose all that apply.
a) There is shocked quartz from this time.
b) There is a crater in Mexico that dates from this time.
c) There is a layer of soot that dates from this time, indicating widespread fires.
d) There are water layers in the deep ocean that show comet dust.
e) There is a layer of iridium (a rare metal) that coats the surface of Earth. The coating appears to have happened at this time.
f) A crater on the moon was found that matched a similar crater on Earth.
g) Iridium was found in trees of that age.
h) Cave paintings show evidence people of that time experienced the comet.
a) There is shocked quartz from this time.
b) There is a crater in Mexico that dates from this time.
c) There is a layer of soot that dates from this time, indicating widespread fires.
d) There are water layers in the deep ocean that show comet dust.
e) There is a layer of iridium (a rare metal) that coats the surface of Earth. The coating appears to have happened at this time.
f) A crater on the moon was found that matched a similar crater on Earth.
g) Iridium was found in trees of that age.
Sorry, I couldn't find evidence of h) Cave paintings showing evidence that people of that time experienced the comet. But hey, who knows, maybe the dinosaurs were really talented painters!
The pieces of evidence used to support the theory that dinosaurs became extinct as a result of a comet impact about 65 million years ago are:
a) There is shocked quartz from this time.
b) There is a crater in Mexico that dates from this time.
c) There is a layer of soot that dates from this time, indicating widespread fires.
d) There are water layers in the deep ocean that show comet dust.
e) There is a layer of iridium (a rare metal) that coats the surface of Earth. The coating appears to have happened at this time.
f) A crater on the moon was found that matched a similar crater on Earth.
g) Iridium was found in trees of that age.
Not Applicable:
h) Cave paintings show evidence people of that time experienced the comet.
The pieces of evidence used to support the theory that dinosaurs became extinct as a result of a comet impact about 65 million years ago are:
b) There is a crater in Mexico that dates from this time. This refers to the Chicxulub crater located in the Yucatan Peninsula, which is believed to have been caused by the impact of a large comet or asteroid.
c) There is a layer of soot that dates from this time, indicating widespread fires. This layer of soot can be found in the geological record and suggests that massive wildfires occurred as a result of the impact.
e) There is a layer of iridium (a rare metal) that coats the surface of Earth. The coating appears to have happened at this time. Iridium is a rare element that is more abundant in comets and asteroids than on Earth. The presence of a global layer of iridium-rich sediment suggests an extraterrestrial impact event.
f) A crater on the moon was found that matched a similar crater on Earth. This refers to the discovery of the Chicxulub crater on Earth, which has a corresponding impact feature on the moon, known as the Sinus Aestuum crater. This provides additional evidence for an impact event.
To summarize, the pieces of evidence supporting the theory of a comet impact 65 million years ago include the presence of the Chicxulub crater, a layer of soot indicating widespread fires, the occurrence of a layer of iridium, and the matching impact craters on Earth and the moon.