COMENIUS: DUSTTOMÁŠ FRONĚK, FILIP ŠIMÁNA

PROBLEMS OF DUSTNESS AND ASPIRATIONS OF OBSERVATIONS

• Aspiration of observations was to determine how much dust there will be on the definite place after 2days and after 1hour, too• For this we had got some special paper which absorbed dust –

there was a problem, when wind started to blow, the sticky tape didn‘t keep this paper• At the end of our observations we had to analyse the samples

(with microscope) and we wrote the needed entries

WORK ORGANIZATION: SEPARATING INTO WORK-GROUPS

• In the beginning we separated into work-groups, in every group there were 6 people• Next step was to choose a place on which we will be

investigating dustness• During 2 weeks we had to take away three samples – each

sample was on the definite place for 48hours

MEASUREMENT OF DUSTNESS

MEASUREMENT OF 1.GROUP• Place: Small gym, under a basketball hoop• Measurements of dustness:

1. picker 67mm2

2. picker 124mm2

3. picker lost

Measurements of 1. group• Graph of dustiness:

12

0

20

40

60

80

100

120

140

Series1

Measurements of 1. group• Table of particles in pickers:

1.Picker 2.picker 3.pickerYes NoNo NoYes YesNo NoYes YesNo YesNo Yes

5050

PailInsectFibers

Soil grainsNot identified

500

1000

100

Types of particles Occurrence of particles Averange of both pickers in %

SmutHair

MEASUREMENT OF 2.GROUP• Place: The first floor, in the corridor next to the staff room• Measurements of dustiness:

1. Picker 53mm2

2. Picker 24mm2

3. Picker 40mm2

Measurements of 2. group• Graph of dustiness:

12

3

0

10

20

30

40

50

60

Series1

Measurements of 2. group• Table of particles in pickers:

1.Picker 2.picker 3.pickerNo No NoYes No YesYes Yes YesNo No NoYes Yes YesYes Yes YesYes No Yes

10066

PailInsectFibers

Soil grainsNot identified

066

1000

100

Types of particles Occurrence of particles Averange of all pickers in %

SmutHair

MEASUREMENT OF 3.GROUP

• Palce: In front of the main entrance, in the south, out• Measurements of dustiness:

1. Picker 17mm2

2. Picker 12mm2

3. Picker 25mm2

Measurements of 3. group• Graph of dustiness:

12

3

0

5

10

15

20

25

Series1

Measurements of 3. group• Table of particles in pickers:

1.Picker 2.picker 3.pickerNo No YesNo Yes NoNo Yes NoNo No NoYes Yes YesYes Yes YesNo No No

1000

PailInsectFibers

Soil grainsNot identified

3333330

100

Types of particles Occurrence of particles Averange of all pickers in %

SmutHair

Measurements of 3. group•Weather:

1.Picker2.Picker3.Picker 3,9

87

64,5

00,40

Average tempereture in °C Average humidity in % Average rainfall in mm2

-2,62,7 74

MEASUREMENT OF 4.GROUP

• Place: Side entrance, in the east, outside• Measurements of dustiness :

1. Picker 17mm2

2. Picker 9mm2

3. Picker lost

Measurements of 4. group• Graph of dustness:

12

3

0

2

4

6

8

10

12

14

16

18

Series1

Measurements of 4. group• Table of particles in pickers:

1.Picker 2.Picker 3.PickerYes NoYes YesNo YesNo NoYes NoNo YesNo No

Occurence of particles averange of pickers in %

50100

Types of particles

SmutHairPail

InsectFibers

Soil grainsNot identified

50050500

Measurements of 4. group•Weather:

1.Picker2.Picker3.Picker

64,5 00

Average tempereture in °C Average humidity in % Average rainfall in mm2

3,9-2,6 87

PROBLEMS (which occured during observations)

• In the assignment there wasn‘t a very good ingenious fix of paper – which could absorbe the dust – two pieces of this paper blew away• Then we had to edit the original assignment – the task was to

count particles of dust on 1cm2 but we could not see such a big area in the microscope• So we observed dust particles on 1mm2

CONCLUSION

• The biggest dustness was in the gym, under the basketball hoop• The lowest dustness was outdoor, near the backdoor• There was no insect

• THANK YOU FOR YOUR ATTENTION