Loading question...
You are in free guest mode. Timed Practice Revision List Attempt History Progress Tracking Create a free account to unlock these tools
Back to Questions
Prev Next
Practice Reading: Multiple Choice, Multiple Answers ID: #33170 Meteorite
Instructions ›
Read the text and answer the question by selecting all the correct responses. You will need to select more than one response.
The impact of a meteorite released an enormous amount of energy, excavating a crater about twice as large as the lunar crater Tycho. The explosion lifted about 100 trillion tons of dust into the atmosphere, as can be determined by measuring the thickness of the sediment layer formed when this dust settled to the surface. Such a quantity of material would have blocked the sunlight completely from reaching the surface, plunging Earth into a period of cold and darkness that lasted at least several months. The explosion is also calculated to have produced vast quantities of nitric acid and melted rock that sprayed out over much of Earth, starting widespread fires that must have consumed most terrestrial forests and grassland. Presumably, those environmental disasters could have been responsible for the mass extinction, including the death of the dinosaurs.

According to the paragraph, which of the following statements are true of the impact at the end of the Cretaceous period:

* Click on the correct answers

Result:

AI explanationShows the answer. Tap to open.
Option 1: "A large amount of dust blocked sunlight from Earth."

Explanation: The text states that the explosion lifted about 100 trillion tons of dust into the atmosphere, which would have blocked sunlight completely from reaching the surface. This directly supports the statement that a large amount of dust blocked sunlight from Earth.

Option 2: "Earth became cold and dark for several months."

Explanation: The text mentions that the dust blocking sunlight plunged Earth into a period of cold and darkness that lasted at least several months. This confirms the accuracy of the statement regarding Earth's conditions after the impact.

Option 3: "New elements were formed in Earth's crust."

Explanation: The text does not mention the formation of new elements in Earth's crust. Instead, it discusses the production of nitric acid and melted rock, but does not imply that new elements were created, making this statement incorrect.

Option 4: "Large quantities of nitric acid were produced."

Explanation: The text explicitly states that the explosion produced vast quantities of nitric acid, which supports the correctness of this statement regarding the impact's effects.

The rest of this explanation is for members. Sign in free to read why the other options are wrong, key words and tips.

Sign in to read the full explanation

With a free account: Retry and compare every attempt.
Be the first! No community answers here yet. Submit yours and help others learn.
How difficult was this question?
Others found: 100% Easy · 0% Medium · 0% Hard
Saving...