topic 3 - Particle Model of Matter

Question 1

density =

Answer 1

mass / volume

Question 2

arrangement of solid

Answer 2

particles are close together
fixed position
regular pattern
particles vibrate  
highest density

Question 3

arrangement in a liquid

Answer 3

particles are close together
move around each other
arranged in an irregular pattern

Question 4

arrangement particles in a gas

Answer 4

particles far apart
move in random motion
free to move around
low density

Question 5

units for density

Answer 5

density - kg/m^3
mass - kg
volume m^3

Question 6

required practical regular shape

Answer 6

measure the mass using a balance
using a ruler measures the width x length x height
use the equation mass/volume to give density

Question 7

required practical for irregular object

Answer 7

weigh the object using a balance and record this mass

fil a eureka can with water up to the bottom of the spout

and place an empty measuring cylinder underneath the pout

carefully place the object in the eureka can

the volume of water in the measuring cylinder = volume of solid

Question 8

internal energy

Answer 8

internal energy is the total kinetic and potential energy of all the particles that makes up a system

Question 9

internal energy =

Answer 9

kinetic + potential energy

Question 10

kinetic energy causes the atom to

Answer 10

vibrate

Question 11

potential energy is caused

Answer 11

between the particles