Particle model of matter

Question 1

what is density

Answer 1

tell mass for given volume

Question 2

density equation and unit

Answer 2

densisty (P)= mass(m) / volume (v)

Question 3

example of density

Answer 3

brick and polystyrene block

Question 4

what is block density

Answer 4

block has high density as lots of mass packed, soild.

Question 5

what is polystyrene block density

Answer 5

has low density as low mass packed because open strucutre and fuel of air space.

Question 6

what is soild and diagram

Answer 6

regular pattern and strong force attraction

Question 7

what happens when soild is heated, and what density

Answer 7

it vibrates as energy is gained. Because it is close to each other there is high density of lots mass in volume.

Question 8

what is liquid and diagram

Answer 8

it is not fixed arrange shape and weak force attratction, can move around + change shape to fit in container.

Question 9

what happens when liquid heated and what density.

Answer 9

when heated it gains energy to move making weaker force, gives high density as lots mass in volume.

Question 10

what is gas and diagram

Answer 10

Gas moves rapdily and far, it has no arrange shape but very weak force attratction.

Question 11

what density does gas have

Answer 11

low density and small mass of volume

Question 12

what happens if contained fixed in gas

Answer 12

makes the pressure incrase

Question 13

what is internal energy

Answer 13

total kinetic and potential energy of all particles in system.

Question 14

what makes a system

Answer 14

atoms and molcules

Question 15

what happens during chane of state from internal energy

Answer 15

mass is always conserved and physical change because, material recover its orginal propeorties if change reserved.

Question 16

what happens when heating soild

Answer 16

increase internal energy, change inot liquid through melting.

Question 17

what happens when heat liquid.

Answer 17

increase internal energy, change inot gas through boiling and evaportion only surface of lqiuid

Question 18

why evaportion only surface in liquid when heating liquid to gas

Answer 18

only surface of liquid because have enough energy)

Question 19

what happens when cool gas down

Answer 19

reduces internal energy, turn back into liquid through condense

Question 20

what happens when liquid cools down.

Answer 20

reduce internal energy, turn back into soild through freezing.

Question 21

what is sublimation

Answer 21

soild turn directly to gas.

Question 22

what is specific heat capacity

Answer 22

amount of energy required to riase the tempertaure of 1kilogram substance by 1 degree celsius

Question 23

what is specific latent heat

Answer 23

amount of energy required to change the state of 1kilogram substance with no change in tempertaure.

Question 24

what is specific latent heat of fusion

Answer 24

1kiloram substance from soild to liquid in melting. no change in tempt.

Question 25

what is specific latent heat of vapporisation

Answer 25

1kilgram substance from liquid to gas in evaportion.

Question 26

diagram of heating and cooling

Answer 26

check in mindmaps

Question 27

practicals method of density for regular shape cube

Answer 27

1. measure+record, lenthg, width,height- ruler used.
2. calculate volume measuring width 3x
3. calculate mass on digital balance
4. density = mass/volume

Question 28

gas with high tempertaure =

Answer 28

high kinetic energy and collosion causing higher pressure

Question 29

gas with low tempertaure=

Answer 29

low kinetic energy and collosion causing lower pressure.

Question 30

how to tell apart(distinguish) regualr and irregualr shape. (exmaple)

Answer 30

regualr of cube, have dimesions, makes it easy to measure with ruler.
Irregualr of vase, cannot easily measure the dimesions.

Question 31

pratical how to density of irregualr shape.

Answer 31

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