I.S. (Burning & Rusting)

Cover a burning candle with a small beaker, __________

• The candle is still burning

• The candle goes out for a period of time

• The candle goes out quickly

• The candle is melting

What will happen to the water level inside the jar after covered with it?

What are the composition of air?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Other gases

• Tanogen

What is the major composition of air?

• Oxygen

• Nitrogen

• Carbon dioxide

• Carbon monoxide

What kind of gas is useful in burning?

• Nitrogen

• Carbon monoxide

• Oxygen

• Carbon dioxide

In burning, _________ and _________ are given out

Cover a lit candle with a jar, the candle goes out.

What will happen if we add some lime water into the jar and shake it ?

• Nothing happen

• Water level rises

• The water turns milky

• The water turns blue

According to the last question, why the colour of lime water changes in the jar?

• Because the lime water react with oxygen

• Because the lime water react with carbon dioxide

• Because it turns milky

• Because it want to change colour

How to put out the fire in the pictures? Why?

How to put out a fire?

• Using a fire extinguisher

• Using fire sand

• Using wood

• Using a fire blanket