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c h a n g e of state.notebook

I Through thai utvt children coMaildate tfM» idMi about changot •< Stated | which con b* r«v«r<Mil lli«y us« ttair uncMMtandirk} to fc*pl«ii»arori«j«*pf I fanutlar phomniiit i

Promethean

March 26, 2014

Changing State ( * I n th i s topic you wil l learn about:

evaporat ion (l iquid changing to gas)

planning an evaporat ion invest igat ion

everyday examples of evaporation

condensation (gas changing to liquid)

• what happens to water when i t boils

• revers ing changes of s ta te

• the water cycle

Promethean Page 2

V:

cl.

Name the change

p Liquid evaporation

Liquid condensation

Gas

Gas

O N

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Water Evaporating

H To make water evaporate you need

to heat it. I t changes from liquid

water into a gas. ^

When water evaporates the gas is

called steam or water vapour.

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5t> Owigitif S t« t *

Investigating Evaporation

What will max* water evaporate faster?

Predictiortf What do you think wilt happen?

; Think about washing drying on a line?

W h a t 'arm ^ # variable*? (th* thi ng* yo« can change) •

How will yetr eontroi them to make it<kfair te»t5& ! •

33EJ

V'—• 4 ->m — '

What do you notice on the outside of a

glass or jug of iced drink?

Where do you think it comes from? the air

What is it called? condensation

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1

change of state.notebook

1) Ic«;d wafer in a |ug:

Droplets of _

. When water

Condensation

form on the outside of the jug,

_ in the air hits the surface of the jug i t condenses into

droplets.

/>nt/ ami drvp,

liquid

water

water c o l t i

vapour

droplets 2) Breathing on a mirror! Water m the breath hits the cold mirror and vapour _ _ _ _ _ _ to water , The mirror "steams" up. A f t e r a while the liquid droplets on the mirror mto the air as water vapour, and the mirror clears.

evaporate

condenses

Promethean Page 7

March 26, 2014

• a What happens to water when it is heated? i

i * Some children were observing water as they

I * heated it. They took the temperature of the L water every two minutes, p

Time / mine Temperature / C°

0 20

2 43

4 70

6 95

8 100

10 100 ;"nt thtrtmin

„so im* gnnpji

rrnttpage*

Promethean Page 8

T«mp«r<»tur« t r a p * fa jhowt !h«.t«mf«r««r« it ««t«r a* .ft i ^cat«tt

- i - t t t- .i i~.„, , . : -i-

f f 4 ^ i|o it Ijim* fit mlrrutai

' t/ie rr^jin

L _ i _ .

Promethean Page 9

| 1 a) What mil th« tamparatura of tti« watar b* a f tar 12 mint? b) What it thit temcwratur* called?

I I After how marry rwnt did the water i ta r t to boil? | 3 What mas rh« temperature of ttw n t v after S mine? |_4 Why doean't ttie) romporaiuro 90 up whan 100 oC it reached

(hint: what if rrw heat doino, to th« water?) : 5 What will happen to ail tfia wafer eventually? { 6 Salty water has a eNghtiy higher botlina point, draw a tin* to

T show what would happen if rtie childrtn heated tarty watar.

i i t t — . t — . 1 — ; . 1 ' L - - L - — 4 I f I I 1 « i t TjirrM In metuttji

Promethean Page 10

Name the change in state

melting

so l id «

solidifying

l iquid water

3 0 OMrigtmp State

Adding ice to water You are going to add ice to water and make

observations and measurements of the temperature.

Before you s ta r t make predict ions about what you

th i r k will happen to the ice and the temperature o f

the water.

What apparatus wil l you need?

^acord all your readings and then plot a graph.

You can also use a datalogger w i th a temperature,

i^rsor. How will this help you?


2

c h a n g e of state.notebook March 26, 2014

Adding ice to water Predictions:

1 3Mkaw*w

Use the yraph from the datalogger to answer these questions.

1) The lowest temperature that the ice/water mixture, reached wa* _

2) When the ic« waJ melting the temperature went

3) Wheal all the ice hod melted the. temperature went

4 ) Find the point on the graph where all th« ic« had f innhed melting.

Mark it with an X.

5) What i j the final temperature of the water.

6) Why does th« temperature stay at tht j final read ing? .


Heat travels f row the water to the ice making the

jce melt and the temperature of the water go down.

Cold travels from the ice to the water so the ice

. melts and the temperature of the water goes down.

Promethean Page 15

SO Changing Sta te

Who do you

agree with,

A or B?

t

A When all the ice has melted, heat from the air in the

"ft: t \ room travels into the water and warms it up again.

8 When all the ice has melted, cold from the water

iscapes into the air and so the water warms up.

Promethean Page 16

Do You Remember?

Ice is melting in a beaker of water.

T r u e or False e r a

l t. The water get* colder because cold travels from the ice to the water.

j FALSE

J 2 . Heat travels f rom the water to the ice making the temperature ; o f the water go down.. i»ue j e g p

I 3. Heat from the water makes the ice melt. r R u e JBB fjjeflk j 4. Cold travels f rom the ice into the water so the ice melts, FALSE I 5. Cold water le f t in a room warms up because the coldness escapes • into the room, MLSE

! 6. Cold water le f t in a room warms up because the heat f rom the

; room travels into the water, nsue

Promethean Page 17

r 5 0 tJiomjmo State

States of Matter

Solid Liquid Gas

melting condensing freezing evaporating

Move The labels to match the correct arrows.

Promethean Page 18

3

change of state.notebook

Mov« the locals to the correct place*.

ice *

water

steam

March 26, 2014

• »

liquid solid gas

• • •

• • • • • •

• •

• solid liquid gas

car) not ftoir- an S i aquas/wrf

,'4*<«» s/ue» o< nontamer- can /tow cannot bo sauaslted f*n«» a/>sp« otcontamar r j n ffiaiy cjnnot be squaaftaef -


Move the labels ta the correct places.

Solids Liquids Gases

methane water clouds rain oxygen vapour

coca cola helium snow ica -

jThe Water Cycle

»• A

Put Th* red label* Jti tht arrow* .ina tnt Hjt labels jn 'he .vast/on marks.

:4 Promethean Page 21 Promethean Page 22

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J tm»ia**—*tir*****H'yiww A

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* A |̂ »t**M*» em ̂

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All th* •ueei c«**»*«*flew «(r»«i*M Bee*uAfw*«i«**r*. tHtnk of *fl rh*i


4

c h a n g e of state.notebook March 2 6 , 2014

> / U o ,

,

. h e o t i t h e sea a n d m a k e * t h e i

, A s t h # wa1

t h e s e o r e t i n y d r o p l e t s o f

t h e l a n d a n d as t h e y r i s e a v e r h i g h g r o u n d t h e y coo l , t h e w a t e r f a l l s b a c k t a

t h e g r o u n d o s _ _ _ _ _ o r . R o m r u n s i n t o s t r e a m * a n d _ _ _ _ _ _ _

<\f\d f l o w s b o c k i n t o t h * ;

Promethean Page 25 Mar 26-1:17 PM

5

Changes of State

There are five changes of state. They are;

Melting: to

An example would be_

Freezing: to

An example would be

Evaporation:. to

An example would be

Condensation: to

An example would be

Sublimation: _

An example would be

to

properties and characteristics notes.notebook March 26, 2014

>AII forms of matter can be described ;and/or identified byf«M»f««:0 '^ . and

Feb 23-3:38 PM

Characteristicf refers toraYeatureof the matter

Colour Flexibility Mass Strength: Hardness-., Texture - \ , '-..

BpiiSi

, ., .,. 1. . . . . J i

• I I I ' « I M i i • Milimi. wanr il••ami *fijBi i <nr iit^rwrtiii ifltwi^'iiiii ft irtw'tf jjnmwMnrtiBMi Al t

Feb 23-3:39 PM

Property deals with how the matter changes when it interacts with • another substance.

^Buoyancy (floats/sinks), *'Sbfubiiity (idfties itdlssolV^ i . :

.'K'L'J*.'•.•'.'>*:>ft :*.-:.<

Feb 23-3:39 PM

^Qyahcy^::.^::.;.:.; ^

Ah object floats when it is | ensi 'sin

Feb 23-3:41 PM

O i l W a t e r

Which ia more d w s c water or oil?

Beaker

\ \ / T

Brick W a t e r

Which Is mora dans* watar or a brick?

Beaker

1

Feb 23-3:40 PM

Buoyancy

Q: Which objects do you think will float in water?

Q: Which objects do you think will sin in water?

Q: What is buoyancy?

Buoyancy is the ability of an object to float in water.

Q: Why do you think some objects float in water and other objects sink?

Q: Will a large heavy log float in water?

Yes

Q: Why does it float even though it's heavy?

An object floats when it is less dense than water. This means that the particles in the log, for example, are farther apart than the particles in water.

An object that has a greater density than water, such as a brick, will sink.

Physical Change

A physical change is when the mat ter in a substance changes size, shape or

form (solid, liquid or gas). Most o f ten i t can be changed back to i ts original

state. During a physical change there is no new mat ter created

There are two types of physical changes.

1. Reversible Physical Change-

The mat te r can be returned to i ts original f o rm

Ex. dissolving sugar in water

2. Non-Reversible Physical Change

The mat te r cannot be restored to i ts original fo rm. I t can't be changed back.

Ex. cut t ing wood - sawdust

Breaking a glass vase - many l i t t le pieces

Chemical Change

A chemical change is a permanent change where one or more new types of matter are formed.

When looking f o r chemical changes watch f o r the following. I f one or more

of these has occurred then i t is likely a chemical change.

o Change in colour

o Heat or Light

o A gas being given o f f

o Smoke, Bubbles or Fizz

Ex. mixing baking soda and vinegar - a gas is given o f f (carbon dioxide)

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