طلب في الانجليزية

falfoula.dz · 2013-02-20, 18:39

اريد بحث الانجليزية الصفحة 93 و قالتنا الاستادة ضعوه في cd من لديه يضعه لي لانني بحاجة بليييييييييييييييييييييز

randa18 · 2013-02-20, 19:09

كان بودي أن أساعدك أكثر لكن هذا مالقيت

The experience How we can search about existence of the Nicotine in cigarettes:
The Instruments:
ط Plastic Bottle
ط Cotton
ط Cigarette
ط Sulfur
The Hypotheses
We can do that by a simple experience and by using that simple
Instruments
The experience
We close the head of the bottle by the cotton then we burn the cigarette in the head of the bottle (WP the cotton), then we press the bottle in order to bun the cigarette; here we observe that the cotton is colored by ye how color that substance is called «Nicotine».

The Final Results
1- When we bean one cigarette cotton’s color changes to ye how.
2- The cigarettes are very dangerous for the health of mankind because it contain poison «Nicotine»