Students are testing how temperature affects the brightness of light sticks at different temperatures. They know light sticks are a technology that transforms chemical energy into light energy. They activate 3 light sticks and put them into 3 beakers containing water at 55 ° Celsius, 23 ° Celsius, and 5 ° Celsius.

Question

What data should the students collect to complete the test?

Answer options with 4 options
A.
the time the sticks give off light

B.
if light is given off by the sticks after 12 hours

C.
the intensity of light given off by the sticks after 10 minutes

D.
the time interval for each stick to start giving off light after activation

Answer 1

To effectively test how temperature affects the brightness of light sticks, the students should collect data that directly measures the intensity of light over a specific timeframe. Among the given options, the best choice is:

C. the intensity of light given off by the sticks after 10 minutes

This option allows for a comparative analysis of how the brightness (intensity of light) varies at different temperatures, which is the primary focus of their experiment. The intensity measured should provide insights into the relationship between temperature and the brightness of the light sticks.