dis7-slides

dis7-slides - ASTR 100 Discussion 7 Oct. 24, 2011 1....

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
ASTR 100 Discussion 7 Oct. 24, 2011
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1. Astronomers have taken images of mountains on both Venus and Mars that appear to be volcanic. Why do astronomers conclude that Venus's volcanoes have been active more recently than Mars's? A. Some of the images of the volcanoes on Venus show eruptions, while none of the images of the volcanoes on Mars do. B. The large amount of carbon dioxide in Venus's atmosphere is most likely to have been released during volcanic eruptions. C. Seismometers placed on the surfaces of Venus and Mars have recorded vibrations from volcanic eruptions on Venus more often than on Mars. D. Venus has many fewer craters on its surface than Mars.
Background image of page 2
Correct: D. The fewer craters on Venus means that Venus's volcanoes have erupted more recently and covered up the craters. Wrong: A. We don't have any images of eruptions on Venus or Mars. Wrong: B. Wrong: D. We have not placed seismometers on Venus or Mars.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2. The slow shifts of our planet's crust arise from A. the gravitational force of the Moon pulling on the
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/02/2011 for the course ASTR 100 taught by Professor Hayes-gehrke during the Fall '06 term at Maryland.

Page1 / 9

dis7-slides - ASTR 100 Discussion 7 Oct. 24, 2011 1....

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online