Definitions
Density
How closely packed the particles are determines the density.
(fill in the blank) The Particle Theory of _________
Matter
state change from solid to liquid is called ____________
melting
in which state do particles vibrate on the spot?
solid
What is the fourth state of matter called?
Plasma
matter
anything that takes up space and has mass
(fill in the blank) All particles of a pure substance are _________________
identical
Deposition is the change from _______ to _________
gas to solid
which state(s) take shape of the container they're in?
liquid and gas
What machine did we just build?
Rube Goldberg Machine
particle
the smallest unit of a substance; cannot be seen with the unaided eye
Particles have ________________________ between them. (name TWO things)
spaces
forces of attraction
Why does ice in the freezer shrink over time?
Sublimation
which state has the strongest forces of attraction between particles?
solid
How can you tell the difference between a plant and an animal cell?
Cell wall, chloroplasts, no lysosome
pure substance
Any solid, liquid or gas that contains only one kind of particle throughout
Explain why food colouring will dissolve quicker in hot water than in cold using the Particle Theory.
The greater the temperature, the greater the speed of the particles.
dew on grass in the morning is the result of which state change?
condensation
which state(s) have a fixed volume?
solid and liquid
We studied, three strands of Science. Name and explain the three strands.
Biology, Physics, Chemistry
kinetic energy
the energy of movement
Which Particle Theory idea helps explain why it is difficult to get grass stains out of your clothes?
Particles have forces of attraction between them
When making custard, the mixture is heated to thicken it. The thickening is a result of which state change?
Evaporation
which state(s) can be easily compressed?
gas
What was the name of the scientist who discovered the movement of particles in his water?
Robert Brown.
Brownian Motion