L3
讲座
1. What is the lecture mainly about?
New research into the composition of solar wind
New technology used to measure solar wind
Effects of solar wind on Earth
Similarities between Earth’s and the Sun’s atmospheres
2. What does the professor illustrate when he mentions the dwarf planet Pluto?
The distance that sol wind can travel
The speed at which solar wind can travel
The role of Earth’s atmosphere in deflecting solar wind
The ways in which solar wind can affect planet surfaces
3. What similarities between wind on Earth and solar wind does the professor point out?（多选题）
The speed of both remains relatively constant.
The movement of both is caused by differences in pressure.
Both have potential to propel vehicles using sails.
Both have potential to power electrical systems on Earth.
4. Why do the northern and southern lights occur only near Earth’s poles?
Reflections from ice near the poles make solar wind activity more visible there than elsewhere.
Solar wind interacts more strongly with gases near the poles than elsewhere.
The atmosphere contains a greater variety of gases near the poles than elsewhere.
Air pressure is stronger near the poles than elsewhere.
5. What does the professor suggest about droughts?
Research on drought patterns is too inconclusive to be of use.
Research on solar wind could be used to prevent droughts.
Solar cycles indicate that droughts are likely to decrease.
Awareness of solar cycles could allow people to prepare for droughts.
6. Why does the student say this:
To question why solar wind does not cause problems more often than it does
To suggest that more should be done to prevent the impact of solar wind
To suggest that solar wind also has positive effects
To express a concern that the impact of solar wind will increase in the future
