The document compares the properties of solids, liquids, and gases. It states that solids retain a fixed shape and volume, with particles locked in place. Liquids assume the shape of their container, with particles able to move past one another. Gases are highly compressible with particles having a lot of free space between them and being able to flow easily.

1. Solids, liquids and gases
Lesson 3. Sciences of nature

2. Let´s compair their properties
Solid Liquid Gas
retains a fixed volume and shape
rigid - particles locked into place
assumes the shape of the part of
the container which it occupies
particles can move/slide past one
another
assumes the shape and volume
of its container
particles can move past one
another
not easily compressible
little free space between particles
not easily compressible
little free space between particles
compressible
lots of free space between
particles
does not flow easily
rigid - particles cannot move/slide
past one another
flows easily
particles can move/slide past one
another
flows easily
particles can move past one
another

4. ¿Te atreves a intentarlo?

5. Across: 1 Instrument for measuring temperature. (11) 5 This doesn't
easily freeze and can be used in 1 across. (7) 6 This lowers the freezing
point of water. (4) 10 Tthe surface change from liquid to gas. (11) 11 The
particles are close together ,but they can still move around in this
state. (6) 12 A word that means particles spreading around and mixing in
liquids or gases, without shaking the mixture! (9) 13 Acronym for
standard attainment target! 14 The particles are far apart and moving
fast in a ? (3) 16 This happens to most materials on cooling. (9) 18
Another word for a gas that's easily condensed. (6) (maybe 5 in the US,
sorry 6 in UK) 22 There is lots of this between particles in a gas. (5) 26
This happens when a liquid changes to a solid. Its brrrrr!!! (8) 28 This
word sums up the movement of gas and liquid particles in all directions.
(6) 30 The change in gas particle speed as they become cooler. (6) 31
The ? pattern of particles in a solid. (7) 33 Ice does this on water, very
strange for a solid in its liquid! (5) 34 You must obtain this to test a
theory in a scientific court! (8) 35 The particles are closest together in
a ? (5) 36 You need this between sections of railway track, especially in
the summer! (3) 37 This particle property changes with change in
temperature. (5)

6. Down: 1 This value tells you how hot or cold a substance is. (11)
2 When a liquid changes to a gas fast to make tea! (7) 3 One
way in which solids are different than gases or liquids, its an
easy question really, not ? (4) 4 Melting, freezing, boiling etc.
are all examples of a ? (5,6) 7 The individual bits of solids,
liquids and gases. (9) 8 A gas is doing this when cooled to form
a liquid. (10) 9 Solids and liquids are more ? than gases. (5) 15
This is very difficult to do with a solid to make a smaller
volume. (8) 17 In terms of whether it is a gas, liquid or solid,
its difficult to ? a cream cake! (8) 19 A solid ? on heating
without melting. (7) 20 Particles move like this when heated!
(6) 21 This is caused by gas particles hitting the side of a
container. (8) 23 The sharp end of melting and boiling? (5) 24
The particles of a solid are under going this without causing a
sound! and more so on heating! (9) 25 The partices in a liquid
are all ? up! (7) 27 Ice thawing is an example of ? (7) 29 ? is a
liquid that expands on solidifying, very unusual! (5) 32 A well
known liquid fuel. (3) 33 The particles become ? to move around
after melting? (4)

7. Down: 1 This value tells you how hot or cold a substance is. (11)
2 When a liquid changes to a gas fast to make tea! (7) 3 One
way in which solids are different than gases or liquids, its an
easy question really, not ? (4) 4 Melting, freezing, boiling etc.
are all examples of a ? (5,6) 7 The individual bits of solids,
liquids and gases. (9) 8 A gas is doing this when cooled to form
a liquid. (10) 9 Solids and liquids are more ? than gases. (5) 15
This is very difficult to do with a solid to make a smaller
volume. (8) 17 In terms of whether it is a gas, liquid or solid,
its difficult to ? a cream cake! (8) 19 A solid ? on heating
without melting. (7) 20 Particles move like this when heated!
(6) 21 This is caused by gas particles hitting the side of a
container. (8) 23 The sharp end of melting and boiling? (5) 24
The particles of a solid are under going this without causing a
sound! and more so on heating! (9) 25 The partices in a liquid
are all ? up! (7) 27 Ice thawing is an example of ? (7) 29 ? is a
liquid that expands on solidifying, very unusual! (5) 32 A well
known liquid fuel. (3) 33 The particles become ? to move around
after melting? (4)