1. 
Fill in the blank:

Paper, like wood, petrol or cotton, belongs to the substances.

2. 
Fill in the blank:

Aluminium filings have a dull surface.

3. 
Which properties of substances can be detected with the senses, according to the text?

4. 
True or False: Sugar crystals and salt crystals can be reliably told apart just by looking at them.

5. 
According to the text, what property do copper filings have?

6. 
Fill in the blank:

In chemistry lessons, substances must never be tested by .

7. 
Fill in the blank:

Butter in the pan only melts at much higher than ice.

8. 
True or False: Not all substances melt when heated – some substances decompose instead.

9. 
According to the text, what can be used to tell substances apart when they are heated?

10. 
Fill in the blank:

If sugar is heated further, a black mass forms; the sugar is said to have .

11. 
True or False: Harmless substances like table salt and sugar may be tasted in the chemistry room if you are sure they are pure.

12. 
Fill in the blank:

An apple smells different from a .

13. 
What are students asked to produce for the "Heating" practical tasks?

14. 
Which substances count as non-flammable according to the text?

15. 
Fill in the blank:

In the "Heating" practical, the materials used include wax, sugar, salt and .