CHAPTER 16. OPTICAL PHENOMENA; PROPERTIES OF MATTER 16.4
Activity: The greenhouse effect
In pairs try to find thefollowing information (e.g. in books, on the Internet)
and report back to theclass in a 5 minute presentation which includes the
following:- What other gases besides carbon dioxide are responsible for the green-
house effect? - Where do greenhouse gases come from? (arethey human-made or natu-
ral?) - Investigate one serious side-effect which could arise if the earth’s temper-
ature were to go up significantly. Present someways in which this effect
could be avoided.
Exercise 16 - 3
- Explain how atomicemission spectra arise and how they relate to each element
on the periodic table. - How do the lines onthe atomic spectrum relate to electron transitions between
energy levels? - Explain the difference between atomic absorption and emission spectra.
- Describe how the absorption and emission spectra of the gases in the atmosphere
give rise to the Greenhouse Effect. - Using table 16.2 calculate the frequency range for yellow light.
- What colour is the light emitted by hydrogenwhen an electron makes the tran-
sition from energy level5 down to energy level2? (Use figure 16.5 to find the
energy of the released photon.) - I have a glass tube filled with hydrogen gas.I shine white light ontothe tube.
The spectrum I then measure has an absorptionline at a wavelength of 474 nm.
Between which two energy levels did the transition occur? (Use figure16.5 in
solving the problem.)
More practice video solutions or help at http://www.everythingscience.co.za(1.) 01mu (2.) 01mv (3.) 01mw (4.) 01mx (5.) 01my (6.) 01mz
(7.) 01n0