particulate nature of matter

Question 1

physical properties of solid

Answer 1

has a definite vol and shape, cannot be compressed

Question 2

physical properties of liquid

Answer 2

has a definite vol, no definite shape and cannot be compress

Question 3

physical properties of air

Answer 3

no definite shape and vol, CAN be compress

Question 4

melting point

Answer 4

the temp at which solid melts into liquid

Question 5

boiling point

Answer 5

the temp of when a substance goes from liquid to gas

Question 6

solid in particles

Answer 6

very closely pack, orderly manner, vibrate abt their fix position, very strong force of attraction

Question 7

liquid in particles

Answer 7

closely pack, disorderly manner, move randomly and slide past each other, strong force of attraction

Question 8

air in particles

Answer 8

far apart, disorderly manner, move freely and quickly in all directions, weak force of attraction

Question 9

which substance can be compressed? why?

Answer 9

air is there is a lot of space between the particles to move closer.

Question 10

what happens if a substance gets heated?

Answer 10

the particles gain energy and vibrate more vigorously abt their fix position. Dist between particles increase, causing vol to increase. thus, expanding

Question 11

diff between mass and vol

Answer 11

mass: how heavy it is - 3kg
vol: size of an object

Question 12

what happens if a substance gets cooled

Answer 12

the particles lose energy and vibrate less vigorously abt their fix position. Dist between particles decrease, causing size to decrease. Thus, contracting

Question 13

does the mass change during the process?

Answer 13

no, the number and size of particles do not change.

Question 14

what is diffusion

Answer 14

the movement of particles from a region of higher concentration to a region of lower concentration

Question 15

solid and liquid have fixed vol but not gases

Answer 15

solid and liquid are not able to move freely but gas particles are

Question 16

solid have fixed shapes but not liquid and gases

Answer 16

solid are arranged in fixed position but particles in liquid and gas are not

Question 17

diffusion is faster in gases then in liquid and in solid

Answer 17

gas particles move randomly in all directions at high speed,

Question 18

gases can be easily compresses but no liquid and solid

Answer 18

the distance between air particles are wider then solid and liquid particles

Question 19

fix vol meaning

Answer 19

amount of space occupied by a substance remains constant and does not change under normal conditions