Question

Radhika performed an experiment and wrote a record of what she had done. Can you rewrite these sentences in the correct order to describe her work? Draw a picture of her experiment. Can you explain what she observed?
(a) I used my wrist watch to check how long each candle burned.
(b) In the lid of the first jar, I punched several small holes.
(c) With my older brother's help, I fixed one candle in each jar and lit them.
(d) I collected the following items: two identical jam jars with lids, two identical small candles, matches, a nail and a hammer.
(e) I left the second jar open.
(f) I wanted to compare the time for which the candles could burn in the two jars.
(g) The second candle continued to burn for a long time.
(h) The candle in the first jar went out first and the jar was filled with smoke.
(i) I closed the first jar with its own lid.

Answer 1

Correct order of Radhika's work:
(d) I collected the following items: two identical jam jars with lids, two identical small candles, matches, a nail and a hammer.
(c) With my older brother's help, I fixed one candle in each jar and lit them.
(i) I closed the first jar with its own lid.
(b) In the lid of the first jar, I punched several small holes.
(e) I left the second jar open.
(f) I wanted to compare the time for which the candles could burn in the two jars.
(a) I used my wrist watch to check how long each candle burned.
(g) The second candle continued to burn for a long time.
(h) The candle in the first jar went out first and the jar was filled with smoke.

She observed that air is needed for burning.