8l - Fluids - The Particle Model

Question 1

Solids - definition 
~Shape
~Volume
~Flow?
~Compress?

Answer 1

Keep their shape and volume; they cannot flow and are difficult to compress

Question 2

Liquids - definition
~Shape
~Volume
~Flow?
~Compress?

Answer 2

Keep their volume not their shape; they can flow, take the shape of their containers and are difficult to compress

Question 3

Gases - definition
~Shape
~Volume
~Flow?
~Compress?

Answer 3

Can change their shape and volume; they can flow, they spread out in all directions and are easy to compress

Question 4

Features of a solid
~Forces
~Spacing
~Movement

Answer 4

Forces : strong
Spacing : close
Movement : vibrate in fixed positions

Question 5

Features of a liquid
~Forces
~Spacing
~Movement

Answer 5

Forces : fairly strong
Spacing : close
Movement : move around within the liquid

Question 6

Features of a gas
~Forces
~Spacing
~Movement

Answer 6

Forces : weak
Spacing : far apart
Movement : move about fast in all directions

Question 7

Diffusion definition

Answer 7

Gases or liquids mix without anything moving them because the particles are moving around all the time

Question 8

Brownian motion definition

Answer 8

Tiny specs of dust in air or water can be seen jiggling around as they hit by the moving air or water particles

Question 9

Expanding definition

Answer 9

Materials expand when heated because the particles vibrate more

Question 10

Contracting definition

Answer 10

Materials contract when cooled because the particles vibrate less

Question 11

Density definition

Answer 11

The density of an object or substance is its mass divided by its volume:
Density = Mass
————
Volume