Question 1
Question
Kinetic theory describes how atoms move in solids, liquids and gases.
Question 2
Question
Kinetic theory describes how _______ move in solids, liquids and gases.
Answer
-
Atoms
-
Electrons
-
Particles
Question 3
Question
The energy an object or particle has because of its movement is called its kinetic energy.
Question 4
Question
Kinetic energy can explain the three states of matter.
Question 5
Question
This structure represents which state of matter?
Question 6
Question
This structure represents which state of matter?
Question 7
Question
This structure represents which state of matter?
Question 8
Question
Which statement is correct?
Answer
-
The particles of a particular substance in each state are the same - only the arrangement and energy of the particles are different.
-
The atoms of a particular substance in each state are the same - only the arrangement and energy of the particles are different.
-
The particles of a particular substance in each state are different - only the arrangement and energy of the particles are the same.
-
The electrons of a particular substance in each state are not the same - only the placement and energy of the particles are similar.
Question 9
Question
Solids have strong forces of attraction that hold the particles close together in a fixed, regular arrangement. The particles don't have much energy so they can only vibrate about their fixed positions.
Question 10
Question
Solids have strong forces of _______ that hold the particles _______ __________ in a ______, regular arrangement. The particles don't have much _____ so they can only ______ about their fixed positions.
Answer
-
attraction
close together
fixed
energy
vibrate
-
separation
far apart
dangerous
movement
wiggle
-
attraction
loosely together
fixed
energy
vibrate
Question 11
Question
Liquids have weaker forces of attraction between the particles. The particles are close together, but can move past each other and form irregular arrangements. They have more energy than the particles in a solid - they move in random directions at low speeds.
Question 12
Question
Liquids have ______ forces of attraction between the particles. The particles are _____ _______, but can move past each other and form ________arrangements. They have _____ energy than the particles in a _____ - they move in ______ directions at ______ speeds.
Answer
-
weaker
close together
irregular
more
solid
random
low
-
similar
far apart
regular
less
gas
uniform
high
-
higher
close together
irregular
less
solid
random
low
Question 13
Question
There are almost no forces of attraction between the particles. The particles have more energy than those in liquids and solids - they are free to move and travel in random directions and at high speeds.
Question 14
Question
There are ______ ___ forces of attraction ______ the particles. The particles have _____ energy than those in liquids and solids - they are free to move and travel in _______ directions and at _____ speeds.
Answer
-
almost no
between
more
random
high
-
almost twenty
on
less
uniform
low
-
nearly 100
between
more
similar
high
Question 15
Question
Conduction of heat occurs mainly in liquids.
Question 16
Question
Conduction of _____ energy is the process where _________ particles pass on their extra _____ energy to ___________ particles.
Question 17
Question
Conduction of heat energy is the process where vibrating particles pass on their extra kinetic energy to neighbouring particles.
Question 18
Question
The process continues throughout the solid and gradually some of the extra kinetic energy (or heat) is passed all the way through the solid, causing a rise in temperature at the other side of the solid. And hence an increase in the heat radiating from its surface.
Question 19
Question
The process continues throughout the ______ and gradually some of the extra _____ energy (or heat) is passed all the way through the solid, causing a _____ in temperature at the other side of the _____. And hence an ______ in the heat radiating from its ________.
Answer
-
solid
kinetic
rise
solid
increase
surface
-
liquid
heat
decrease
liquid
impact
bottom
-
solid
kinetic
influx
liquid
increase
surface
Question 20
Question
Usually conduction is faster in denser solids, because the particles are closer together and so will collide more often and pass energy between them. Materials that have larger spaces between their particles conduct heat energy much more slowly - these materials are insulators.
Question 21
Question
Usually ________ is faster in ______ solids, because the particles are _______ ________and so will ______ more often and pass energy between them. Materials that have ______ spaces between their particles conduct _____ energy much more ______ - these materials are ________.
Answer
-
conduction
denser
closer together
collide
larger
heat
slowly
insulators
-
convection
denser
further apart
avoid
larger
heat
quickly
convectors
-
conduction
denser
closer together
collide
smaller
kinetic
slowly
inducers
Question 22
Question
Why are metals good conductors?
Question 23
Question
Metals conduct so well because the electrons are free to move inside the metal.
Question 24
Question
At the hot end of the metal, electrons will move: faster or slower?
Question 25
Question
At the hot end of the metal, electrons will more faster and collide with other free electrons. What happens next?
Question 26
Question
Because the electrons can move freely, this is obviously a much faster way of transferring the energy through the metal than slowly passing it between jostling neighbouring atoms. This is why heat energy travels so fast through metals.
Question 27
Question
If a spade is left in the sun and you touch the metal part, it feels much hotter than the wooden handle. This is because the metal is hotter.
Question 28
Question
If a spade is left in the sun and you touch the metal part, it feels much hotter than the wooden handle.
IT ISN'T HOTTER - it just conducts the heat into your hand much quicker than the wood, so your hand heats up much quicker.