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Help the student to solve the problems concerning colloids.
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♦ Is dust a colloid? If so, what type is it?
♦ Is whipped cream a colloid? If so, what type is it?
♦ What does Sol mean?
♦ When hit by light what happens to a colloidal mixture?
♦ What is the mixture considered if the particles are larger than the particles of a colloidal substance?
2. Find ten words in the wordsearch from the text B. (→, ↓)
| Q | F | K | A | H | F | O | A | M | G | Y |
| D | H | U | C | C | O | L | L | O | I | D |
| I | D | I | S | P | E | R | S | I | O | N |
| A | P | F | S | U | W | O | T | S | O | L |
| L | E | E | M | U | L | S | I | O | N | P |
| Y | A | P | A | R | T | I | C | L | E | O |
| S | R | E | P | A | R | O | M | I | S | T |
| I | L | I | Q | U | I | D | N | E | A | M |
| S | O | L | U | T | I | O | N | L | O | L |
Match the words from the box with the pictures.
| emulsion; sol; foam; aerosol; solid foam; gel |
a___________________ b__________________ c___________________
D__________________ e__________________ f___________________