Question

logan is growing hydrangeas in his garden. he notices that the hydrangeas have different colors of flowers depending on where they were planted. he wonders what factors affect the color of the hydrangeas. he has the following supplies available: two hydrangea plants, one bag of fertilizer, water, aluminum sulfate. using only these supplies, which questions can logan investigate with an experiment? select all that apply. do hydrangeas grow different - colored flowers when watered with water and vinegar compared to water alone? do hydrangeas grow different - colored flowers when grown with fertilizer compared to without fertilizer? do hydrangeas grow different - colored flowers when earthworms are introduced to the soil? do hydrangeas grow different - colored flowers when kept under a purple grow light compared to a green grow light?

Explanation:

Logan has two hydrangea plants, a bag of fertilizer, water, and aluminum sulfate. He can use one plant as a control and the other for testing the effect of fertilizer by giving it to one plant and not the other. He can also manipulate watering conditions by adding substances to water for one plant while using plain water for the other. However, he has no earthworms or different - colored grow lights among his supplies, so he cannot test those factors.

Answer:

1. Do hydrangeas grow different - colored flowers when watered with water and vinegar compared to water alone? (No, as he has no vinegar)
2. Do hydrangeas grow different - colored flowers when grown with fertilizer compared to without fertilizer? (Yes)
3. Do hydrangeas grow different - colored flowers when earthworms are introduced to the soil? (No, as he has no earthworms)
4. Do hydrangeas grow different - colored flowers when kept under a purple grow light compared to a green grow light? (No, as he has no grow lights)

So the answer is: Do hydrangeas grow different - colored flowers when grown with fertilizer compared to without fertilizer?