A good question for a scientific investigation should be testable and connected to scientific concepts. Casey wants to investigate light. Which of the following questions is best for guiding his investigation? A) What is the prettiest color of light? B) Which type of light bulb is the easiest to catch? C) Which type of light bulb burns the longest? D) Which type of light bulb do moms prefer?

Among the options provided, the question that is best for guiding Casey's scientific investigation on light is: C) Which type of light bulb burns the longest?

Explanation:

• A good scientific question should be testable, measurable, and connected to scientific concepts or principles. It should be specific and allow for investigation through systematic observation and experimentation.
• Option C, "Which type of light bulb burns the longest?" meets these criteria. It is a testable question that can be investigated by conducting experiments with different types of light bulbs and measuring their lifespan or duration of burning.
• This question involves a measurable variable (the duration of light bulb burning), and through experimentation, Casey can gather data to compare and determine which type of light bulb lasts the longest. It's directly connected to a scientific concept related to the longevity or durability of different types of light bulbs.
• Options A, B, and D are more subjective or do not provide a clear and measurable variable for investigation, making them less suitable for a scientific investigation on light.