Question

1. all objects ____ energy.

○ radiate
○ conduct
○ insulate
○ eliminate

Explanation:

To solve this, we analyze each option:

• "radiate": All objects emit (radiate) energy in the form of electromagnetic radiation (e.g., thermal radiation), which is a fundamental physical principle.
• "conduct": Refers to transferring heat through direct contact, not all objects' general energy emission.
• "insulate": Means to prevent heat transfer, opposite of what all objects do.
• "eliminate": Implies removing energy, but objects radiate, not just eliminate.

So "radiate" is correct.

Answer:

A. radiate