Question

what do these two changes have in common?
melting glass
chicken cooking in an oven
select all that apply.
both are only physical changes.
both are chemical changes.
both are caused by heating.
both are caused by cooling.

Explanation:

1. Analyze "melting glass": Melting glass is a physical change (changes state from solid to liquid, no new substance) and is caused by heating.
2. Analyze "chicken cooking in an oven": Cooking chicken is a chemical change (new substances form, like cooked proteins) and is caused by heating.
3. Evaluate options:

• "Both are only physical changes": False (cooking chicken is chemical).
• "Both are chemical changes": False (melting glass is physical).
• "Both are caused by heating": True (melting glass needs heat to melt, cooking chicken needs oven heat).
• "Both are caused by cooling": False (both require heat, not cooling).

Answer:

The correct option is:
Both are caused by heating.