States of Matter and Density

Front

What is the definition of a solid?

Back

A solid is a state of matter characterized by particles that are closely packed together in a fixed arrangement, resulting in a definite shape and volume.

Front

What is the definition of a liquid?

Back

A liquid is a state of matter where particles are close together but can slide past one another, allowing it to take the shape of its container while maintaining a definite volume.

Front

What is the definition of a gas?

Back

A gas is a state of matter in which particles are far apart and move freely, filling the entire volume of their container and having no definite shape or volume.

Front

What is density?

Back

Density is the mass of an object divided by its volume, often expressed in units like grams per cubic centimeter (g/cm³) or milligrams per milliliter (mg/mL).

Front

How do you calculate density?

Back

Density = Mass / Volume.

Front

What happens to the density of a substance when it is heated?

Back

Generally, the density of a substance decreases when it is heated because the particles move apart, increasing the volume.

Front

What happens to the density of a substance when it is cooled?

Back

Generally, the density of a substance increases when it is cooled because the particles move closer together, decreasing the volume.

Front

What is the relationship between temperature and the state of matter?

Back

Temperature affects the state of matter; increasing temperature can change solids to liquids (melting) and liquids to gases (evaporation), while decreasing temperature can change gases to liquids (condensation) and liquids to solids (freezing).

Front

What is an example of a substance that can exist in all three states of matter?

Back

Water (H₂O) can exist as ice (solid), liquid water, and steam (gas) depending on temperature and pressure.

Front

What is the particle arrangement in a solid?

Back

In a solid, particles are tightly packed in a fixed, orderly arrangement, which gives solids a definite shape.