End of unit questions
1. Tick the correct answer for each question.
(i) This activity shows that
A air is present in water.
B air is present in an empty bottle.
C air bubbles are entering the bottle.
D air is important for breathing.
(ii) Which one of these animals breathes air present in the soil?
Ash B deer C worm D bird
(iii) Which of the following is not a property of pure air?
A Noiseless B Colourless C Tasteless D Odourless
(iv) We breathe air
A only when we are working. Bonly when we are sleeping.
C all the time. Donly when we are tired.
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