Exploring Phases of Matter

What are the three main phases of matter?

• plasma

• solid, liquid, gas

• steam

• fog

List three properties of solids.

• Definite color

• Variable density

• 1. Definite shape 2. Definite volume 3. Incompressibility

• Fluidity

How do liquids behave when poured into a container?

• Liquids only take the shape of the bottom of the container.

• Liquids evaporate immediately when poured.

• Liquids conform to the shape of their container.

• Liquids remain in a fixed shape regardless of the container.

What is the main difference between a gas and a liquid?

• Gases are denser than liquids; liquids are less compressible than gases.

• Gases have a definite shape and volume; liquids have no fixed shape.

• Gases can flow freely; liquids cannot change shape at all.

• Gases have no fixed shape or volume; liquids have a definite volume but take the shape of their container.

Illustrate what happens during the melting process.

• Melting is the process of a solid evaporating into a gas.

• Melting is the process where a solid turns into a liquid as it absorbs heat.

• Melting occurs when a gas condenses into a liquid.

• Melting is when a liquid turns into a solid as it loses heat.

Give an example of condensation in everyday life.

• Ice forming on a frozen lake.

• Fog settling in the early morning.

• Steam rising from a hot cup of coffee.

• Water droplets on a cold glass of water.

What occurs during the evaporation of a liquid?

• Molecules at the surface of a liquid gain energy and escape into the gas phase.

• Molecules in the center of the liquid gain energy and sink deeper.

• The temperature of the liquid decreases as it evaporates.

• All molecules in the liquid instantly turn into gas.

Describe what happens to water when it freezes.

• Water contracts and becomes denser when it freezes.

• Water remains in liquid form when it freezes.

• Water expands and forms ice when it freezes.

• Water evaporates completely when it freezes.

How does temperature affect the phase changes of matter?

• Phase changes occur independently of temperature.

• Temperature has no effect on the movement of particles.

• Temperature influences phase changes by altering the kinetic energy of particles, facilitating transitions between solid, liquid, and gas states.

• Temperature only affects the color of matter.

Provide a real-world example of a phase change from gas to liquid.

• Dew formation on grass.

• Snow sublimating directly into vapor.

• Water boiling into steam.

• Ice melting into water.