PHYSICS

Question 1

whats matter ?

Answer 1

everything that has mas and volume

Question 2

what is mass

Answer 2

the amount of matter in a object

Question 3

what is volumr

Answer 3

space taken up by an object

Question 4

what are the 3 states of matter

Answer 4

solid liquid gas

Question 5

properities of solid

Answer 5

tightly packed , vibrates in place , fixed volume

Question 6

properties of liquid

Answer 6

slightly spaced , flows, fixed volume

Question 7

properties of gas

Answer 7

very far apart, move freely , not fixed voume

Question 8

whats the only state that can b ecompressed

Answer 8

gas

Question 9

what are the 3 particle models

Answer 9

1, all matter is made up of particles
2. particles are always moving
3 particles are held togther by attraction force

Question 10

whatr is diffusion

Answer 10

high concentration to low concentration

Question 11

diffusion does not hapen in —- and why

Answer 11

diffusion does not happen in solids because they vibrate in place and they do not have the ability to flow

Question 12

what is brownian motion

Answer 12

movements of particles randomly
only in gases
eg is smoke

Question 13

WHEN YOU EXPAND ——

Answer 13

volume increases density decreases

Question 14

when u contract———–

Answer 14

volume decreases denisty increases

Question 15

metals expand bny —– and

Answer 15

metals expand by heating and contract by cooling

Question 16

whats density

Answer 16

the amount of matter in a specific place

Question 17

denisty and volkume are alwyas

Answer 17

opposite

Question 18

unit of density

Answer 18

g/cm3

Question 19

how to measure mass

Answer 19

scale

Question 20

measuring volume

Answer 20

LxWxH

Question 21

solid to liquid

Answer 21

melting

Question 22

liquid to gas

Answer 22

evaporation

Question 23

gas to liquid

Answer 23

condensation

Question 24

liquid to solid

Answer 24

freezing

Question 25

what is the difference between boiling and evaporation

Answer 25

evaporationn happens at any temp and boiling happens at 100

Question 26

physical change

Answer 26

reversible , melting ,freezing eg cutting paper

Question 27

chemical chsnge

Answer 27

irreversdible , burning , eg cooking

Question 28

by heating

Answer 28

expands , volume increases, density decreases ( floats)

Question 29

by coolinG

Answer 29

contracts, volume decreases,denisty increases (sinks)

Question 30

WHATS THE DENSITY OF WATER

Answer 30

1G/CM3

Question 31

whats a abnomalous behaviour

Answer 31

waters unique proeprty of expanding rather than contracting when cooled between 0-4 which results ice being less dense than liwuid water

Question 32

what is pressure

Answer 32

particles hitting / colliding with eachother

Question 33

What is a fluid

Answer 33

anything that has the ability to flow , eg liquid n gas

Question 34

what are the factors affecting pressure

Answer 34

number of partices ( high particles, high pressure ) temp ( high temp, high pressure) compressing (low pace high pressure

Question 35

explain why the bottom hole is the furthesy

Answer 35

the deeperr you go , the more the pressure

Question 36

density high

Answer 36

sink

Question 37

density low

Answer 37

float

Question 38

what is floating

Answer 38

the upthrust is the same as the weightwh ( balanced forces)

Question 39

what is sinking

Answer 39

the weight is more than the upthrust ( unbalenced forces)

Question 40

what is a drag

Answer 40

drag is a force that acts opposite to the moving object,. slowing them down

Question 41

what is a drag force in the air

Answer 41

air resistance

Question 42

drag force in the water

Answer 42

water resistance

Question 43

any opposing force is a

Answer 43

drag

Question 44

steady speed

Answer 44

motion and water resistance are equal

Question 45

in place

Answer 45

all arrows balamced

Question 46

how to reduce drag

Answer 46

streamline shape , smooth

Question 47

how does a parachute work

Answer 47

alot of surface area to produce drag

Question 48

partiicles are held by attraction force . put them in order

Answer 48

solid>liquid>gas

Question 49

by heating

Answer 49

gain kinetic energy,, expands , volume ibncreases,density decreases, object floats

Question 50

bvy cooling

Answer 50

LOSE ENERGY CONTRACTS , VOLUME DECREASES , DENSITY INCREASES, OBHEXCT SINKS

Question 51

WHY DOES