Activity 1. Insert the most appropriate word from the text
1. …………… is the removal from a given lot of material a portion that is representative of the whole yet of convenient size for analysis.
2. …………..… sampling is usually expensive, slow, and inaccurate.
3. In …………………… an electric discharge is established between a pair of electrodes, one of which is made of the material being analyzed.
4. A successful separation of a valuable mineral from its ore can be determined by …………………….… testing.
5. The amount of emitted ………….…is related to the concentration of individual elements in the sample.
6. Particles of less ………………….. than the liquid remain afloat, while denser particles sink.
7. Several different fractions of particles with the ………..… density can be produced.
8. The sensitivity and precision of this method are poor for elements of low atomic ……………………..
9. Many different sampling ………………………… are available, including shovels, pipe samplers, and automatic machine samplers.
10. Detection and measurement of the wavelengths and intensities of the emission spectra reveal the identities and concentrations of the ……………….… in the sample.
Activity 2. Complete the expressions given below
| 1. single-sized | a) size |
| 2. international | b) particles |
 3. valuable
| c) methods |
| 4. mesh | d) testing |
| 5. mineral | e) concentrations |
| 6. atomic | f) fraction |
| 7. heavy-liquid | g) analysis |
| 8. chemical | h) number |
| 9. low | i) mineral |
| 10. measurement | j) standards |
Activity 3. Match words with the definitions
| 1Sampling | A-a sample bombarded with X rays gives off fluorescent X-radiation of wavelengths characteristic of its elements |
| 2 Emission spectroscopy | B-a successful separation of a valuable mineral from its ore determined by heavy-liquid testing |
| 3 X-ray fluorescence spectroscopy | C- the removal from a given lot of material a portion that is representative of the whole yet of convenient size for analysis |
| 4 Detection | D- an electric discharge is established between a pair of electrodes, one of which is made of the material being analyzed |
| 5 Mineralogical analysis | E-Sensing |
Activity 4. Complete the table
| Types of analysis | Description | Analyzed elements |
| Chemical analysis | ||
| Mineralogical analysis | ||
| Size analysis |
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