Question

an investigation involves determining which metal is better for making pots that will cook food faster. which is the best hypothesis to use for this investigation? ○ copper is better than iron for making pots ○ copper is more malleable and heats up faster than iron. ○ if copper is a better conductor, it will heat up faster than iron. ○ if copper heats up faster than iron, it is better for making pots.

Explanation:

A hypothesis should be a testable prediction with a cause - effect relationship. Let's analyze each option:

• Option 1: "Copper is better than iron for making pots" is a statement of opinion without a testable cause - effect relationship related to the cooking speed (the goal of the investigation).
• Option 2: "Copper is more malleable and heats up faster than iron" is a statement of facts about copper and iron, not a hypothesis that can be tested to answer the question of which is better for making pots that cook food faster.
• Option 3: "If copper is a better conductor, it will heat up faster than iron" focuses on the conductivity - heating speed relationship but does not directly relate to which is better for making pots to cook food faster.
• Option 4: "If copper heats up faster than iron, it is better for making pots" has a cause (copper heating up faster) and an effect (being better for making pots to cook food faster), and it is testable by comparing the heating speeds of copper and iron pots and then seeing their cooking efficiency.

Answer:

D. If copper heats up faster than iron, it is better for making pots