Question

lemon juice can cause milk to curdle, or form solid clumps. olivia mixed two cups of milk and four teaspoons of lemon juice in each of three pots. she used nonfat milk in one pot, low - fat milk in one pot, and full - fat milk in the third pot. olivia put lids on the pots and left the mixtures to curdle on the stove over medium heat. after 20 minutes, she removed a small sample of curdled milk clumps from each pot and calculated the average clump size in each sample. olivia repeated this process four times.

identify the question that olivia’s experiment can best answer.

does the type of milk affect the sizes of clumps formed when the milk curdles?

does stirring a mixture of lemon juice and milk affect the sizes of the curdled milk clumps?

does nonfat milk curdle faster than low - fat or full - fat milk when lemon juice is added?

Explanation:

Olivia's experiment uses different types of milk (nonfat, low - fat, full - fat) and measures the clump size of the curdled milk. The question "Does nonfat milk curdle faster than low - fat or full - fat milk when lemon juice is added?" is about comparing the curdling speed of different milk types, which her experiment (with different milk types and measuring clump size, but also the process involves waiting for curdling) can address as she is using different milk types and observing curdling - related aspects. The other questions: the first is about milk type affecting clump size (but her experiment's main variable in terms of milk is type, but the question is about clump size due to milk type, however her experiment's focus on different milk types and curdling can also relate, but the third question is about stirring a mixture affecting clump size, which she didn't vary (she mixed lemon juice and milk, but not the stirring of the mixture as a variable). So the question about nonfat vs low - fat vs full - fat milk curdling speed is best answered by her experiment as she has different milk types and is observing curdling (by measuring clump size after a set time, so speed can be inferred from when curdling occurs or the clump size development, but more directly, the experiment with different milk types can answer which curdles faster).

Answer:

Does nonfat milk curdle faster than low - fat or full - fat milk when lemon juice is added?