Chemical and Physical Changes

Front

What is density?

Back

Density is the mass of an object divided by its volume, typically expressed in kg/L or g/cm³.

Front

How do you calculate density?

Back

Density = Mass / Volume.

Front

What happens to the particles of matter when temperature decreases?

Back

The particles slow down and move closer together.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing its identity, such as color, density, or melting point.

Front

What is a chemical property?

Back

A chemical property is a characteristic that can only be observed during a chemical reaction, such as flammability or reactivity.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, such as sweet tea or distilled water.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture where the components are not uniform and can be easily separated, such as vegetable soup.

Front

What is deposition in terms of phase changes?

Back

Deposition is the process where a gas transforms directly into a solid without passing through the liquid phase.

Front

What is melting?

Back

Melting is the process where a solid turns into a liquid when heat is applied.

Front

What is sublimation?

Back

Sublimation is the process where a solid turns directly into a gas without becoming a liquid first.