Clicker questions

1
Clicker questions

• Activity 22, pages 79-82
• Escape of Gas from a Planetary Atmosphere

2
2C if you put the container in Fig. 1 in an
oven, what will the pressure do, and why?

1. Decrease more energy goes into velocities, less
   into pressure
2. Stay the same both container molecules have
   same higher temperature
3. Increase molecules gain heat energy, so they
   move faster
4. Increase molecules have a thermal spectrum
5. None of the above

3
3B ___ keeps molecules from escaping a planet or
moon ___ keeps the molecules from collapsing
down to its surface

1. Pressure pressure
2. Gravity pressure
3. Pressure gravity
4. Gravity gravity
5. None of the above

4
4A What are the most common speeds of helium
atoms at 300 K and 1000 K(in units of kilometres
per second)?

1. 3 and 6
2. 0 and 0
3. 1 and 2
4. 2 and 4
5. 2 and 5

5
5B At the same temperature, about how fast does
the typical H2 molecule move compared to the
typical H2O molecule?

1. 4 times faster
2. 2 times faster
3. 2 times slower
4. 3 times slower

6
6C In the thin atmosphere of the Moon, is it
more likely to find CO2 or H2?

1. CO2, because its typical velocity is less than
   the Moons escape velocity
2. H2, because its typical velocity is greater than
   the Moons escape velocity
3. Both are equally likely

7
7A Why does the atmosphere of Jupiter have more
hydrogen than the atmosphere of Earth?

1. Jupiter has more mass than Earth does
2. Temperature of gas near Jupiter lower than near
   Earth
3. Hydrogen has less mass near Jupiter (farther from
   Suns gravity)
4. 1 and 2
5. All of the above