Question

Which statement is true?(1 point)
Responses

Particles speed up when an object solidifies.
Particles speed up when an object solidifies.

Particles in an object move faster at 50°C than at 20°C.
Particles in an object move faster at 50°C than at 20°C.

Particles move faster when they melt than when they evaporate.
Particles move faster when they melt than when they evaporate.

An object melts as the particles slow down.

Answer 1

The true statement among the options provided is:

**Particles in an object move faster at 50°C than at 20°C.**

This is because an increase in temperature leads to an increase in the kinetic energy of the particles, causing them to move more rapidly.

The other statements are false:
- Particles do not speed up when an object solidifies; they actually slow down and become more ordered.
- Particles typically move faster when they evaporate than when they melt, as evaporation involves transitioning from a liquid to a gas where molecules have more energy.
- An object does not melt as particles slow down; melting occurs when the particles gain energy and move more freely, transitioning from a solid to a liquid.