Question

that-can-be-investigated-with-a-set-of-materials
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 two questions can logan investigate with an experiment?
do hydrangeas grow different - colored flowers when grown with fertilizer
compared to aluminum sulfate?
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 watered with water
and vinegar compared to water alone?

Explanation:

1. For the first question (fertilizer vs aluminum sulfate): Logan has two hydrangea plants, one bag of fertilizer, and aluminum sulfate. He can apply fertilizer to one plant and aluminum sulfate to the other (while providing water to both) and observe flower color differences.
2. For the second question (fertilizer vs no fertilizer): With two plants, he can apply fertilizer to one and no fertilizer to the other (both get water) and check for flower color variations. The other two questions involve earthworms (not available) and vinegar (not available), so they can't be investigated with the given supplies.

Answer:

A. Do hydrangeas grow different - colored flowers when grown with fertilizer compared to aluminum sulfate?
B. Do hydrangeas grow different - colored flowers when grown with fertilizer compared to without fertilizer?