Question

In Priestley's second experiment in which both a plant and the candle were enclosed in the container, what occurred?

The flame persisted longer than the original experiment

It exploded

It changed color

The candle was extinguished immediately

Answer 1

In Priestley's second experiment, where both a plant and a candle were enclosed in a container, the candle burned longer than it did in the original experiment without the plant. This observation led to the conclusion that the plant was releasing a gas (later identified as oxygen) that supported combustion. Therefore, the correct answer is:

**The flame persisted longer than the original experiment.**