Q 01/05

How many states of matter are observable in everyday life?

A) Four

B) Two

C) Three

D) Five

Answer · why

A) Four

Neon signs and lightning are everyday examples of partially ionised plasma.

Q 02/05

Particles in a liquid stay close but slide past each other, so a liquid keeps what?

A) Its shape but not its volume

B) Its volume but not its shape

C) Both shape and volume

D) Neither shape nor volume

Answer · why

B) Its volume but not its shape

That is why a liquid keeps its volume but takes the shape of its container.

Q 03/05

Which state of matter has both a definite shape and a definite volume?

A) Gas

B) Liquid

C) Solid

D) Plasma

Answer · why

C) Solid

A solid can only change shape through an outside force, such as being broken or cut.

Q 04/05

Which state expands to fill both the shape and the volume of its container?

A) Solid

B) Liquid

C) Glass

D) Gas

Answer · why

D) Gas

Gas particles are far apart and move freely, which also makes gases compressible.

Q 05/05

What does plasma contain that ordinary gas does not?

A) Free-moving charged particles

B) Tightly packed molecules

C) Hydrogen bonds

D) Crystal lattices

Answer · why

A) Free-moving charged particles

The ions and free electrons respond to electric and magnetic fields.