Science worksheet exploring the science behind candle burning and carbon dioxide production.

Let’s think through this step by step.

The worksheet is about a candle burning under an upside-down jar. The question asks:
“What is produced when a candle burns? What is a possible explanation as to why the candle went out?”

First, let’s recall what happens when something burns — like a candle.
When a candle burns, it uses oxygen from the air. It also produces:
- Carbon dioxide (a gas we breathe out)
- Water vapor (like steam)
- Heat and light

Now, imagine putting a jar over the candle. The jar traps the air inside. As the candle burns, it uses up the oxygen in that trapped air. Once the oxygen runs out, the candle can’t burn anymore — so it goes out.

Also, the carbon dioxide and water vapor build up inside the jar, but the main reason the candle stops burning is because there’s no more oxygen left to support the fire.

So, putting it simply:

✔ When a candle burns, it produces carbon dioxide, water vapor, heat, and light.
✔ The candle goes out under the jar because it uses up all the oxygen inside the jar, and fire needs oxygen to keep burning.

Final Answer:
When a candle burns, it produces carbon dioxide, water vapor, heat, and light. The candle goes out under the jar because it uses up all the oxygen inside the jar, and fire needs oxygen to keep burning.