Question

When an object is heated its size.
a) Increases.
b) Decreases.
c) Remains same.
d) None of the above.​

Answer 1

When a substance is heated its volume increases and its density decreases. This happens because the mass of a substance remains same, but its volume increases.

The increase in volume of substance with increasing temperature is called expansion.

Answer 2

Answer:

Option A is the correct answer

Increases

• The molecules and atoms of a substance vibrate more quickly when heat is introduced.
• The distance between atoms widens when atoms vibrate more quickly. The particle's velocity and spacing determine the substance's state of matter.
• The increased molecular motion ultimately causes the item to grow and occupy more area.

Explanation:

• The molecules that makeup everything on Earth are exceedingly little and constantly moving.
• Heat causes molecules to travel more quickly and separate from one another.
• They occupy more space as they spread apart, making even solid objects slightly bigger.
• As molecules cool, they become slower and take up less space. As a result, some objects slightly contract.

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