Page 64 - ScienceStd4

4. Water temperature at 100 °C or 212 °F is called _____.

(a) the freezing point of water

(b) the boiling point of water
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(c) the melting point of water

(d) the steam point of water

5. When water is heated, it boils and changes into _____.

(a) steam

(b) milk

(c) ice

(d) liquid

Section B: Write TRUE for a correct statement and FALSE for
an incorrect statement.

6. Water obtained by condensing steam is clean and safe.

7. Hail is often common in very low temperature environment.

8. Water that has boiled to its boiling point is safe for drinking.

9. Frozen food can last longer without spoiling.

10. When water freezes, it turns into gas immediately.

Section C: Answer the following questions:

11. How can the liquid water be changed into steam and turned

back into a liquid state?

12. How can you use water in each of its states: solid, liquid,

and gaseous states?

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SCIENCE AND TECHNOLOGY STD 4.indd 57 14/01/2025 18:38