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Nelson Education > School > Secondary Science > Physics 12 > Teacher Centre > Web Activities > Chapter 1
 

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UNIT 1 - FORCES AND MOTION: DYNAMICS

Chapter 1 - Kinematics

1.3 Acceleration Due to Gravity

Section 1.3 Questions (p. 40)

  1. Dr. Luis Alvarez has suggested that the extinction of the dinosaurs and numerous other species 65 million years ago was caused by severe temperature drops following the insertion of dust into the atmosphere. The enormous quantities of dust resulted from an asteroid impact in the YucatÁn area of what is now Mexico. Research this topic and write a brief report on what you discover.

University of California, Berkeley
Museum of Paleontology
A departmental site at UC. It clearly lays out its hypothesis and looks at alternate arguments.

Dinosaur Volcano Greenhouse Extinction
This site looks at two different theories. Both of these theories deal with particles in the atmosphere but offer different explanations on how the particles got there.

The Journal of Dinosaur Paleontology
Under the section IMPACT THEORIES AND EXTINCTION EVENTS you will find a number of different articles with topics such as forensic evidence of asteroid impact and possible impact times.

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1.5 Frames of Reference and Relative Velocity

Practice (p. 56)

  1. Airline pilots are often able to use the jet stream to minimize flight times. Find out more about the importance of the jet stream in aviation.

     NOVA On-Line
    As part of a site that looks at a round-the-world balloon race, NOVA answers frequently asked questions about the jet stream.

    Understanding Winds, Jet Streams
    USA Today gives a description of the jet stream and how it influences weather. It also gives an in depth discussion of winds, how the et Stream forms, and how the jet stream affects weather.

    TreeBeard's Stumper Answers
    This web page looks at how the rotation of Earth and the jet stream effect flight times. This page specifically looks at a flight back and forth across North America and whether the effects mentioned above help or hinder total flight times.

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