Standard Science Primary 6 Energy

A plant is placed in a sealed glass container with a candle. Under which condition would the candle likely stay lit for the longest time?

A The container is placed under a bright lamp.
B The container is placed in a cool, dark cupboard.
C The plant is removed from the container.
D The container is placed in a dark room.
Show Worked Solution

Worked Solution

Step 1: Identify that a candle needs oxygen to burn. Step 2: Identify that photosynthesis produces oxygen and requires light. Step 3: A plant under a bright lamp will produce oxygen, replenishing what the candle consumes.

Correct answer: The container is placed under a bright lamp.

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free