TASK OF PHYSICName : Triska Ajeng PermataClass : VII-CNo. Absent : 25

Kinds of thermometerA) Advantage of Alcohol

thermometerAdvantage of Mercury thermometer

B) Disadvantage of Alcohol thermometerDisadvantage of Alcohol thermometer

C) Make two graps, from two datas

A) Kinds of thermometer1) Glass thermometer

Properties : It is used to measure the temperature of

water, this water can hot, warm, fresh, and cold.

It can measure the temperature precisely, because it has large expansion coefficient.

The liquids are used as a thermometer filler usually used by alcohol, because it can measure a low temperature.

Its expansion is regular.

2) Six-Bellani Maximum and Minimum thermometer

Properties : It is used to measure a maximum temperature, mainly inside glass house used for plantation as research object.

The thermometer consist of alcohol (now it is used creosote oil), mercury and small stell pointer which is equiped by light spring as its holder.

It is used to measure a maximum thermometer at afternoon and a minimum thermometer at night.

3) Wall thermometer

Properties : This thermometer is used to measure

a room temperature Usually, the thermometer is set on

straight position on the wall in a room This wall thermometer of the

measurement has two measurement scales, those are Celcius and Fahrenheit scales.

4) Clinic thermometer manual

Properties : This thermometer is usually used to

measure a human body temperature The tube of the termometer is filled

with mercury The scale of the thermometer is

designed from 35° Celcius until 42° Celcius and never lower than 35° C and never higer than 42° C

5) Clinic thermometer digital

Properties : This thermometer is usually used to

measure a human body temperature. This thermometer not used by

mercury, but working automatic method

Way used this thermometer just in place from the under of tongue or arm.

And result of measurement can see direct.

B)1) Advantage of Alcohol thermometer

It can measure a low temperature, because its freezing point is low (-115° Celcius)

It can measure the temperature precisely, because it has large expansion coefficient, and

Its expain is regular

B)2)Advantage of Mercury thermometer

It is visible, because its colour is silvery shining

Its expansion is regularIt does not make wet the wall of its placeIt can measure a high temperature, because

its boiling point is high (365,9° Celcius)It can measure the temperature quickly and

precisely.

C)1) Disadvantage of Alcohol thermometer

It cannot measure a high temperature, because its boiling point is low (78° Celcius)

It makes wet the wall of its place It is colourless, so it must be given

deystuff in order too be visible.

C)2) Disadvantage of Mercury thermometer

It cannot measure very low temperature, because its freezing point is high (-40° Celcius)

Mercury is poisonous, so it is harmfull if its tube is broken, and

Its price is very high.

D)1)Make two graphs,from two datas: Growth of Spinach

9091,5

92,5 9394

95 95,5

86

88

90

92

94

96

CENTIMETER

1st day 3rd day 5th day 7th day

11th day 13th day 15th day

So, growth of Spinach each once day no definite.

D)2)Make two graphs,from two datas:Weight of childrens in the Posyandu

2

5

6 6

5

4

2

0

1

2

3

4

5

6

7

5 kg 6 kg 7 kg 8 kg 9 kg 10 kg 11 kg

Amount of weight

Total of weight childrens = 237 kg

Total of childrens in the Posyandu = 30 Childrens