1) A researcher wants to know whether studying with background music affects students’ test scores. Which is the independent variable? a) Whether or not music is playing while studying. b) The student's test scores. 2) Scientists test how different amounts of fertilizer affect the growth of tomato plants. Which is the independent variable? a) The growth of the tomato plants (height, number of tomatoes, etc.). b) The amount of fertilizer used. 3) A school wants to see if the number of hours students sleep affects how alert they feel in class. Which would be the dependent variable? a) Hours of sleep. b) Student's alertness in class. 4) A teacher wants to know if the type of reading material (novel, newspaper, or online article) changes students’ reading comprehension scores. What is the dependent variable? a) The length of the reading passages b) The students’ reading comprehension scores 5) A scientist is testing whether drinking more water improves athletes’ running times. What is the dependent variable? a) The athletes’ running times b) The amount of water consumed. 6) A school wants to see if different amounts of homework affect students’ grades. What is the independent variable? a) Students’ grades b) The amount of homework assigned. 7) A company tests whether the brightness of office lights influences employee productivity. What is the dependent variable? a) The employees’ productivity levels b) The type of light bulbs used. 8) Researchers want to know if listening to classical music while studying improves memory test scores. What is the indepent variable? a) The kind of music (classical vs. none) b) The memory test scores. 9) A farmer experiments to see if using organic fertilizer changes the number of pumpkins grown. What is the dependent variable? a) The kind of soil used. b) The number of pumpkins produced 10) A researcher tests how the temperature of water affects the time it takes sugar to dissolve. What is the dependent variable? a) The time it takes the sugar to dissolve b) The temperature of the water. 11) Scientists study how the amount of sunlight impacts the growth of bean plants. What is the independent variable? a) The amount of sunlight each plant receives b) The height of the bean plants. 12) Students are testing if different types of liquids (water, vinegar, soda) affect how fast ice cubes melt. What is the dependent variable? a) The temperature of the freezer b) The time it takes the ice cube to melt

Independent v Dependent Variables

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