States of Matter

What is a solid?

• A state of matter with a fixed shape that does not take the shape of its container.

• A state of matter that flows and takes the shape of its container.

• A state of matter that can be compressed easily.

• A state of matter that exists only at extremely high temperatures.

What is a liquid?

• A state of matter that can be poured and takes the shape of its container.

• A solid that can change shape when heated.

• A gas that fills the entire volume of its container.

• A form of matter that cannot be compressed.

What is the freezing point of water?

• -10°C (14°F)

• 0°C (32°F)

• 10°C (50°F)

• -5°C (23°F)

What must be done to change water from liquid to solid?

• Lower the temperature.

• Increase the temperature.

• Add salt to the water.

• Expose the water to sunlight.

What is an example of a liquid?

• Sand

• Water

• Sugar

• Air

What is melting?

• The process where a solid changes into a liquid when heated.

• The process where a liquid changes into a gas when heated.

• The process where a solid becomes a gas without becoming a liquid.

• The process where a liquid changes into a solid when cooled.

What must be done to change water from solid to liquid?

• Lower the temperature.

• Raise the temperature.

• Add salt to the water.

• Increase the pressure.

What is a gas?

• A state of matter that has no fixed shape and expands to fill its container.

• A solid that can change shape under pressure.

• A liquid that has a definite volume but no fixed shape.

• A form of matter that can only exist at extremely low temperatures.

What is the boiling point of water?

• 90°C (194°F)

• 100°C (212°F)

• 110°C (230°F)

• 80°C (176°F)

What happens during evaporation?

• Water changes from a solid to a liquid.

• Water changes from a liquid to a gas, usually caused by heat.

• Water changes from a gas to a solid.

• Water remains in the same state.