1. There are some words given in bold type in the text. Choose their synonyms in the box below.
| to emit | to discover | to isolate | specimen |
| enough | highly | to yield | astonishment |
2. Make up word combinations using the words from columns A and B. Each word can be used once only. Consult the text if necessary. Think of 3-4 sentences with these expressions and write them down.
| A | B |
| to develop | rays |
| to wrap in | currents |
| to give off | radioactive elements |
| to invent | energy |
| to measure | a plate |
| to attract | pitchblende |
| to release | ones interest |
| to isolate | black paper |
| to process | an electrometer |
3. Fill in the table with the missing part of speech. (Add some more nouns).
| Verb | Noun |
| astonish | |
| emission | |
| measure | |
| detection | |
| fluoresce | |
| dark | |
| modify | |
| belief | |
| explain | |
| separation |
4. Use the words given in capitals at the end of each line to form a word that fits in the space in the same line.
1. New rays were soon . DETECTION
2. .. compounds did not produce X-rays. FLUORESCE
3. The plate . DARK
4. Uranium gave off rays. PENETRATE
5. Marie Curie analyzed rays by pitchblende. EMISSION
6. She the electrical discharge of the rays. MEASUREMENT
7. Uranium compounds greatly her. ATTRACTION
8. He that atoms were not solid. BELIEF
9. They made another amazing . DISCOVER
10. The Curies isolated two unknown elements. RADIOACTIVITY
Follow-up activities
1. Choose key sentences from the text and write them down.
2. Use your key sentences while speaking about discoveries made by Henri Becquerel and the Curies.
3. Find some additional information about Henri Becquerel and the Curies and use in your reports about these scientists.