Chapter 14 Clickers Natural Hazards Fourth Edition Impacts

How old is the sun, approximately? a) b) c) d) e) 5 million years

Scientists classify particles in the solar system by a) b) c) d) e) By

The figure shows what type of particle from the solar system? a) b) c)

A particle from the solar system that strikes the Earth is called a a)

What is the significance of the Tunguska River Valley in Siberia in terms of

The figure shows an example of what type of crater? a) b) c) d)

Which is not a reason craters are more common on the moon than the

Which concept is now used to explain the processes that form the Earth’s landscapes?

How is mass extinction characterized? a) b) c) d) e) All of these are

Which has not been a cause of mass extinction? a) b) c) d) e)

Which of the following was not a result of the K-Pg Boundary mass extinction?

The impact or airburst of an asteroid or comet is not a direct cause

Which has the most influence on the consequences of an airburst or direct impact?

What have scientists been doing to minimize the impact hazard? a) Developing weapons to

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Scientists classify particles in the solar system by a) b) c) d) e) By diameter and temperature By speed of entry and mass By diameter and speed of entry By composition and diameter By mass and composition © 2015 Pearson Education, Inc.

What is the significance of the Tunguska River Valley in Siberia in terms of asteroids? a) Site of enormous wildfires in prehistoric times caused by an asteroid. b) Site of the largest impact crater ever recorded on Earth. c) Largest meteorite was sighted. d) Location of crater that marks the asteroid that killed the dinosaurs. e) Large airburst of an asteroid occurred in recent history. © 2015 Pearson Education, Inc.

Which is not a reason craters are more common on the moon than the Earth? a) Ocean impact sites have been buried by marine sediment. b) Very few meteoroids enter Earth’s atmosphere. c) Ocean impact sites have been destroyed by plate tectonic processes. d) Land impact craters have eroded. e) Smaller meteoroids tend to disintegrate in Earth’s atmosphere. © 2015 Pearson Education, Inc.

Which concept is now used to explain the processes that form the Earth’s landscapes? a) b) c) d) e) Punctuated uniformitarianism Catastrophism Uniformitarianism None of these are used Gradualism © 2015 Pearson Education, Inc.

How is mass extinction characterized? a) b) c) d) e) All of these are characteristics If there any survivors How large the volcanic eruption is How much the climate changes within a period Sudden loss of large numbers of plants and animals relative to the number of new species being added © 2015 Pearson Education, Inc.

Which of the following was not a result of the K-Pg Boundary mass extinction? a) b) c) d) e) About 70 percent of all land marine genera died off Set the stage for the evolution of mammals Widespread wildfires were experienced everywhere Demise of swimming reptiles Demise of large dinosaurs on land © 2015 Pearson Education, Inc.

Which has the most influence on the consequences of an airburst or direct impact? a) b) c) d) e) Population of the site of airburst or impact Size of the extraterrestrial object Probability that it will occur Time between impacts or airbursts None of these influence the consequences © 2015 Pearson Education, Inc.

What have scientists been doing to minimize the impact hazard? a) Developing weapons to destroy an extraterrestrial object larger than 1 km (~3300 ft) in diameter. b) Building bunkers to hold everyone in case of a large impact. c) They have been working on all of these. d) Identifying and categorizing nearby objects that may threaten Earth. e) Working to break up all extraterrestrial objects that are within a certain distance from Earth. © 2015 Pearson Education, Inc.