Answer:Here's a breakdown of the questions and whether they are testable or not: Testable: 1. Does the amount of sunlight affect the growth rate of tomato plants? YES This can be tested by growing tomato plants under different light conditions (e.g., full sun, partial shade, no sun) and measuring their growth over time.2. What is the effect of different types of soil on the growth of radish seeds? YES You can plant radish seeds in different types of soil (e.g., sandy, clay, loam) and compare their germination and growth rates.3. How does varying the amount of sugar in a recipe change the taste of cookies? YES This can be tested by baking cookies with varying amounts of sugar and having a group of people taste and rate the cookies.4. What impact does listening to music have on a student's concentration while studying? YES You could design an experiment where students study with and without music and then compare their performance on a test.5. Does the type of fertilizer affect the height of corn plants? YES You can grow corn plants using different fertilizers and measure their heights over time to see if there are differences. Not Testable: 6. What is the best color for a room to feel relaxing? NO "Relaxing" is subjective and depends on individual preferences. There's no objective way to measure the best color.7. How do different people perceive happiness? NO Happiness is a complex emotion with individual interpretations. There's no single, measurable way to compare how different people experience it.8. What is the most beautiful landscape in the world? NO Beauty is subjective and depends on personal taste. There's no objective way to determine the "most beautiful" landscape.9. Which movie is the most entertaining? NO Entertainment is subjective and depends on personal preferences. There's no objective way to measure which movie is "most entertaining."10. How important is having a good sense of humor? NO "Importance" is subjective and depends on context and individual values. There's no objective way to measure the importance of humor. Key Points: - Testable questions can be answered through observation, experimentation, or data collection. They focus on measurable outcomes.- Not testable questions deal with subjective opinions, values, or concepts that are difficult or impossible to measure objectively.