Particle Model Of Matter

Question 1

Describe the density in the solid Polystyrene

Answer 1

• The density is low this is because yes Polystyrene is a solid however it has a very open structure that is full of air, causing it to have a small mass for its volume

Question 2

How do you measure the Density of regular objects? (3 steps)- REQUIRED PRACTICLES

Answer 2

1- You measure the mass with a balance
2- you measure the w X l X h (volume) with a ruler
3- you use the density formula

Question 3

How do you measure the Density of irregular objects? (4 steps)- REQUIRED PRACTICLES

Answer 3

1- use a balance to weight the irregular shape
2- you need an euskera can
3- carefully drop ur material in the euskera can , as the euskera can has a spout it will cause the water to be displaced to the cylinder
4- use the density formula

Question 4

Measure the density of liquids: (4 steps)- REQUIRED PRACTICLES

Answer 4

1- measure the empty measuring cylinder
2- place water inside and measure the measuring cylinder with the water
3- subtract results 2 from results 1
4- use the density formula

Question 5

define internal energy:

Answer 5

the sum of all kinetic and potential energy of all particles in a system

Question 6

what is matter?

Answer 6

anything that has mass and takes up space

Question 7

how can a substance change state?

Answer 7

depending on the amount of energy being transferred or removed from its system