Ukuran huruf
Lembar kerjaQuiz 1
Total soal: 12
Worksheet time: 9mins
What caused the iridium anomaly?
an impacting asteroid or comet hit the Earth
a volcanic eruption
a supernova that exploded
Select all the pieces of evidence provided by Alvarez to support the impact theory.
high iridium concentration
fossils
Shocked quartz grains
excesive levels of plutonium
What is the significance of the iridium anomaly in the study of the extinction of dinosaurs?
It indicates a decrease in volcanic activity.
It suggests a change in oceanic temperatures.
It provides evidence of an asteroid collision.
It points to a rise in atmospheric carbon dioxide.
The fossil record is primarily based on the preservation of:
a) Soft tissues
b) Muscle fibers
c) Bones and teeth
d) Cell structures
Which of the following best describes the role of the fossil record in understanding the history of life on Earth?
a) It provides a complete and continuous record of all extinct species.
b) It offers insights into the evolution of specific organisms, but not broader patterns.
c) It helps scientists understand the timing and relationships between different organisms.
d) It is irrelevant to the study of Earth's history.
An asteroid collision with Earth is believed to have caused the mass extinction of dinosaurs, approximately:
a) 10 million years ago
b) 50 million years ago
c) 66 million years ago
d) 100 million years ago
The Chicxulub crater, believed to be linked to the extinction of dinosaurs, is located in:
a) Australia
b) Mexico
c) Antarctica
d) Canada
The impact of an asteroid collision can cause widespread destruction due to:
a) Earthquakes
b) Volcanic eruptions
c) Tsunamis
d) All of the above
Fossils are typically formed through a process called:
a) Carbon dating
b) Fossilization
c) Radiometric decay
d) Sedimentary deposition
The size of a crater formed by an asteroid impact depends on various factors, including the:
a) Speed of the asteroid only
b) Size of the asteroid only
c) Speed and size of the asteroid
d) Atmospheric conditions at the impact site
Which of the following factors has the most significant influence on the size of the crater formed by an asteroid impact?
a) The density of the asteroid
b) The angle of impact
c) The composition of the target surface
d) The speed of the asteroid
The size and speed of an asteroid are crucial factors in assessing its potential impact hazard to Earth. Which of the following combinations poses the greatest risk?
a) Small size, low speed
b) Small size, high speed
c) Large size, low speed
d) Large size, high speed
