Lesson 31 questions – Solids Liquids Gases
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1
a)
Draw a diagram of each state of matter and describe each state in terms
of the spacing, ordering and motion of atoms or molecules.
A solid has definite shape and volume. Its particles are packed very close
together, so solids can't move, but they can vibrate. Solids are made up of
crystal shapes, which is the regular repeating order of particles (except for
amorphous solids).………………………………………………………… (3)
Liquids have definite volume but not definite shape, since it takes the shape of
its container. The particles that make up liquids are close together, but not
packed. Liquids have the ability to flow. Viscosity is the resistance of a liquid
to flow.…………………………………………………………………………… (3)
Gases have neither a definite shape or volume. Their particles are spaced far
apart and they are able to move
freely.……………………………………………………………………………… (3)
SOME
Extension
The particles of plasma are very far apart. It also has very high energy, which
makes it quite dangerous. Although it is rare on Earth, it is the most common
phase in the universe. The sun and stars are made of plasma.
b)
Describe what is meant by a Kinetic Molecular Theory for Solids
Liquids and Gases.
Particles are in constant motion. In solids the particles are close together and
have limited motion. In a liquid some of the attraction between particles is
overcome which allows the particles more freedom of movement. In a gas
particles attraction between particles is minimized and the particles move
freely throughout the container.
…………………………………………………………………………………… (2)
SOME
2
A Student asks on a Physics blog “If all matter is either solid, liquid, gas or
plasma, what state of matter is a single atom or molecule?” What would
you write in answers to this question?
……There are more states of matter than just Solid Liquid and Gas. (1)
Solid, amorphous solid, liquid, gas, plasma, super-fluid, supersolid, degenerate
matter, neutronium, strongly symmetric matter, weakly symmetric matter, quarkgluon plasma, fermionic condensate, Bose-Einstein condensate and finally... Strange
matter
(1).……………………………………………………………………………………..
…State of Matter" is not the same as "Matter" therefore a correct answer to this
question would be (1) All matter comes in many states, a single atom is an atom, a
single molecule is a molecule. (1)
The differing arrangements of atoms or molecules are what make up the various states
of matter it can fulfil. (1)
………………………………………………………………..
…………………………………………………………………………………… (4)