S8P4

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. Examples include elements and compounds.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each retains its own properties. Mixtures can be homogeneous or heterogeneous.

Front

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout (e.g., saltwater), while a heterogeneous mixture has a non-uniform composition (e.g., salad).

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the role of neutrons in an atom?

Back

Neutrons help stabilize the nucleus of an atom and do not have a charge.

Front

What determines the state of matter of a substance?

Back

The state of matter is determined by the arrangement and movement of its particles.

Tags

NGSS.MS-PS1-4

Front

What is the average speed of molecules in solids?

Back

In solids, molecules are closely packed and vibrate in place.

Tags

NGSS.MS-PS3-1

Front

What happens to the particles in a liquid?

Back

In liquids, particles are close together but can move past one another, allowing liquids to flow.

Tags

NGSS.MS-PS1-4

Front

What is the average speed of molecules in gases?

Back

In gases, molecules are far apart and move quickly in all directions.

Tags

NGSS.MS-PS3-1