PARTICLE MODEL OF MATTER Flashcards
DENSITY PRACTICAL how could you get errors weighing the object
the balance may not be exactly zero to start with- not callibrated)
density equation
mass/ volume m/v
DENSITY PRACTICAL example apparatus
- eureka can
- measuring cylinder
DENSITY PRACTICAL what’s the point of the practical
to find out the density of different materials- cubes of material are easy for volume (length x width x height) For irregular shapes, you need a eureka can to work out the volume
DENSITY PRACTICAL how could you get errors when using the eureka can
water may spill out of the sides if you drop the object in too quickly or from a high distance/ there may already be some water in the measuring cylinder/ the water might not be at exactly the level of the spout
what is the correct unit for mass
kilograms (kg)
definition for density
Density is a measure of how tightly the mass of an object is packed into the space it takes up.
True or false? “Liquids are generally denser than solids and gasses”
what does density depend on?
The density of a substance depends both on the mass of the
particles and how closely spaced they are. This means that density changes when substances change state, and when they are heated or cooled.
what is a Vernier calliper
Vernier callipers are sophisticated measuring instruments designed to accurately measure linear dimensions such as lengths, depths, and diameters.
which piece of equipment could the student use to get a more accurate measurement of the length of the block
Vernier calliper
The particles are arranged in a regular pattern in ___a)___
The particles are close together but not in a pattern in ____b)____
The particles move quickly in all directions in ____c)____
a) ice
b) water
c) steam
when substances change state what is conserved
mass
what is a physical change
when a substance changes without becoming a new chemical. These physical changes are often changes in state such as melting, freezing, boiling, condensing and dissolving.
internal energy definition
The internal energy is the total amount of kinetic energy and chemical potential energy of all the particles in the system.
