Researcher’s notebook
2nd year of Primary Education
INTERMEDIATE
SUN PROTECTION SCHOOL PROGRAM
LEVEL
Is your shadow always the same?
The shadow gives us very useful information in order to photoprotect ourselves against harmful rays from the sun. We shall now find out how…
We shall organize ourselves in order to research.
You must organize yourselves in 4 or 5 work groups. Each work group is made up by:
• A human clock
• Someone responsible for measuring
• Someone responsible for taking notes
• Observer
If you are more than four you can make up couples. Each team needs:
• The notes table you will find in the next pages of this notebook
• A pencil and an eraser
• A tape measure
Lets establish the research hours.
During the day you shall go out to the playground twice. Taking as reference the civil time, the times to go out shall be: 10am and 1pm. Since this activity is carried out outdoors, keep in mind that 30 minutes before going out you must properly apply photoprotector.
2 INTERMEDIATE LEVEL / 2ND YEAR OF PE Researcher’s notebook
WORKSHEET 1
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2
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Is your shadow always the same?
4 We research.
Each time the work team goes out to the playground, each member of the team must do the following:
• Human clock: be in a place where the sun strikes you.
• Person responsible for the measurements: carry out two measurements. The first of the human clock’s height (you just need to measure it the first time you go out) and the second, of the length of the shadow that it projects on the ground.
• Person responsible for taking notes: take notes in the following table of the results that the person responsible for measuring communicates you.
Time Height of the human clock
10 am 1 pm
Shadow’s length
• Observer: must stay alert to make sure that every member of the team carries out their work correctly. In addition to this, it is necessary to mark in the table which is the biggest measurement: the human clock or the shadow.
Time What measures more?
The human clock
10 am
The shadow 1 pm
The human clock
The shadow
3 INTERMEDIATE LEVEL / 2ND YEAR OF PE Researcher’s notebook WORKSHEET
1
Is your shadow always the same?
5
We take note of the conclusions of our research.
At what time was the shadow of the human clock the longest?
At what time was the shadow of the human clock the shortest?
At what time was it the warmest?
Where was the sun at the time when it was the warmest?
Summing up. Write down the relation between the shadow and the temperature.
The more The less
the less the more
and the Sun is and the Sun is
. .
4 INTERMEDIATE LEVEL / 2ND YEAR OF PE Researcher’s notebook WORKSHEET
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6
Sun protection
Sunscreen, when correctly applied to the skin, is a product that prevents the harmful effects of the sun.
With this experiment, we are going to see how a sunscreen’s sun filters protect the skin, preventing burns and other injuries.
Getting organised to investigate.
You must organise yourselves into four or five work groups. Each team will need the following objects to conduct the experiment:
• A piece of black card
• Sunscreen
• A moisturising cream with no sun protection
• Three adhesive labels
Conducting the experiment.
On the black card, mark three clearly differentiated areas and stick a label in each area to identify them.
On the labels of one of the three areas, write “NO PROTECTION”, on the second “CREAM WITH NO SUN PROTECTION” and on the third “SUNSCREEN”.
Spread a light layer of moisturiser on the area marked “CREAM WITH NO SUN PROTECTION”. Spread a light layer of sunscreen on the area marked “SUNSCREEN”.
Leave the card in the sun for 24 hours and observe the results.
5 INTERMEDIATE LEVEL / 2ND YEAR OF PE Researcher’s notebook
WORKSHEET 2
1
2
3
WORKSHEET 2
Sun protection
4 5
Writing down the conclusions of our research.
Are there any changes in the area of card marked “NO PROTECTION”?
Are there any changes in the area marked “CREAM WITHOUT SUN PROTECTION”?
Finally, are there any changes in the area marked “SUNSCREEN”?
What conclusions can you draw?
What have we learnt?
The part of the card where we have applied sunscreen has not been altered by the effect of the sun’s rays because the sunscreen has prevented the ultraviolet rays from damaging it.
The part of the card where we have applied moisturising cream has not been altered by the effect of the sun’s rays because the moisturising cream has prevented the ultraviolet rays from damaging it.
The part of the card where we have not applied any product has not been altered because the sun’s rays have no effect on the card.
6 INTERMEDIATE LEVEL / 2ND YEAR OF PE Researcher’s notebook