Physics G7 U2 State of mater, The particle theory and Density

Organize these options into the right categories

Groups:

(a) Solid

,

(b) Liquid

,

(c) Gas

• It can move freely but limited

• It has definite volume but it doesnt have fixed shape

• Distance between particle is very tight

• It cannot move freely

• It has neither definite shape nor volume

• Distance between particle is more tenuous

• It can move very freely

• Distance between particle is very tenuous

• It has definite shape and volume

Substances that the movement of the particle is very free is ...

• gas
• solid
• liquid
• plasma

The shape and volume of solid is always fixed, this is becuase the arrangement of the molecule of solid is ...

• loosely arranged and chaotic
• randomly scattered and disorganized
• fluid and adaptable
• tightly packed and organized

As particle is exposed to a colder temperature, they ...

• Particles disintegrate and lose their structure.
• Particles move faster and become less ordered.
• Particles remain unchanged in motion and order.
• Particles move slower and may become more ordered.

WHy do cold drink glasses fog up?

• The glass is made of a special material that changes temperature.
• The cold glass cools the water vapor, forcing it to release its energy

• Fogging occurs due to the glass being too thick.
• Water vapor absorbs the heat

You feel cold when you get out of a pool. It is because water is taking the heat out of your skin.

• True
• False

Organize these options into the right categories

Groups:

(a) Evaporation

,

(b) Condensation

,

(c) Sublimation

,

(d) Deposition

• Solid to gas

• It gains heat

• Shrinking camphor

• Drying clothes under the sun

• Freeze dried food

• It loses heat

• Breathing on a cold window

• Formation of dry ice

• Frost forming on a freezer

• Dew forming in the grass

• It requires heat

• Gas to solid

• Puddle drying up

• The disappearance of nail polish remover

• It releases heat

• Dry ice creating fog

• Snowfall in clouds

• Liquid to gas

• Gas to liquid

• Cloud formation

Choose the correct statemets

• Melting requires heat to change

• Evaporation releases heat to change

• Freezing requires heat to change

• Deposition releases heat to change

Examples of deposition are ...

• Frost formation

• Shrinking champor

• Formation of igneous rocks
• Snowflake

What is density?

• Density isa measure of how much "stuff" (mass) is packed into a given amount of space (volume).

• Density is the temperature of a substance.
• Density is the volume of an object divided by its mass.
• Density is the weight of an object.