Which box represents a substance that flows but keeps its volume?

How do particles in an iron nail move at room temperature?

A sample of oxygen warms without changing state. What happens to its particles on average?

Which label belongs on the arrow in this model?

Which state of matter does this model represent?

As candle wax becomes a pool, how does its particle arrangement change?

Water is cooled until it hardens. Which change does this model show?

Which event releases thermal energy to the surroundings?

Water leaves a puddle's surface without bubbling. What is this process?

Where can bubbles of water vapor form during boiling?

Why does sweat help cool the skin when it dries?

Water vapor meets a cold surface. Name the change represented by the arrow.

Moist air cools enough for fog to form. What happens to water particles as droplets develop?

Dry ice left at room temperature undergoes the change shown. What is it called?

What energy transfer allows dry ice to change directly into vapor?

In this model, water vapor forms ice without first making droplets. Which process occurs?

Water, nails, and timber begin at 25 °C in a dark room held at 40 °C. What temperatures will they approach after enough time?

Liza leaves hot coffee in a cooler room. What is the net direction of thermal energy transfer?

When ice in a sealed container becomes water, what happens to its molecules?

Which state is formed when a gas becomes sufficiently ionized?