Researcher’s notebook
3rd year of Primary Education
INTERMEDIATE
SUN PROTECTION SCHOOL PROGRAM
LEVEL
The found Word
Go
As you answer the questions of the Treasure hunt, you will obtain some letters that you must write down in this box.
Write
When you are done with the 15 questions, you will have to arrange the 15 found letters in the following box in the correct order to find the word we are looking for.
Arrange the letters in the correct order
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1
2
in
3
www.isdinsunlab.com in order to be able to answer all questions posed by the Treasure Hunt.
Which word have you found? here the found letters
The found Word
4 While you were looking for this word you have learnt many things with which you must be able to complete this text:
The skin is the organ in the human body and has layers. The sun, which is a in the system, emits, among others, types of to Earth: , and .
Only and rays reach the .
Although the sun has benefits, for example, it allows plants to perform and people to generate , UVA and UVB rays can our .
To protect ourselves from the sun, we should wear a , drink a lot of , wear and choose the right with a suited to our type. If you do all this, you will have yourself properly from the sun.
Select the appropriate word for each gap.
ultraviolet, UVA, T-shirt, sunscreen, Largest, three, Earth, D, ultraviolet, UVB, vitamin, damage, rays, solar, three, photosynthesis, water, star, UVC, skin, sunglasses, protection, UVA, sun, skin, factor, protected, UVB.
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Let’s build a sundial
We propose that you build a sundial. You will need the following things:
• Scissors
• Glue bar
• Cardboard (you can use an old shoe box)
• Sundial templates (you will find them in the following pages)
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WORKSHEET
1
Let’s build a sundial
Getting to know the components that make it up.
Our clock is the sun and it comprises three components: the spring and summer side, the autumn and winter side and the gnomon. The two first components will take into account the time of the year in which we shall build the sundial:
• The upper side shall read the time in spring and summer.
• The lower side shall read the time in autumn and winter.
Spring and summer side
Autumn and winter side
The gnomon template is the one that shall project the shadow; you must take into account the latitude of the city you are in.
In order to do so, you must select one of the four templates proposed in accordance with the latitude of your city. If it doesn’t appear, select the latitude of a close city.
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WORKSHEET 2
2
40 º 36 º 42 º 38 º
Gnomon for 40 º Gnomon for 36 º Gnomon for 42 º Gnomon for 38 º
Let’s build a sundial
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out the parts following the orange lines. 3
/ summer side
Cut
Spring
WORKSHEET 2
Let’s build a sundial
Cut out the parts following the orange lines.
Autumn / winter side
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3
Let’s build a sundial
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the
the orange
3 Gnomon for 40 º Lower side 40 º • Ávila • Madrid •
• Toledo • Cuenca • Teruel • Castellón •
Cut out
parts following
lines.
Guadalajara
Valencia WORKSHEET 2
Let’s build a sundial
Cut out the parts following the orange lines.
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3 Gnomon for 36 º Lower side 36 º • Huelva • Cádiz • Jerez • Algeciras • Málaga • Almería
WORKSHEET 2
WORKSHEET 2
Let’s build a sundial
Cut out the parts following the orange lines.
Burgos
Logroño
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42 º
Gnomon for 42 º Lower side
• Vigo • Orense • León • Palencia •
•
• Pamplona • Barcelona
Let’s build a sundial
Cut out the parts following the orange lines.
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38 º Lower side 38 º
Gnomon for
• Sevilla • Córdoba • Jaén • Linares • Cartagena • Murcia • Alicante WORKSHEET 2
Let’s build a sundial
Cut out and paste.
Now that you already know the parts, you must cut them out. Once you have them cut out, you must paste them on a cardboard piece so that they are more resistant. Once pasted, cut them out again. Be careful! The sides of the sundial must be pasted by lining up the centers of the circumference of each side. By doing so you will get a visible sundial that you shall be able to use the whole year long.
Spring and summer side
Autumn and winter side
Fit the parts.
Once you have cut and pasted them, you have everything you need in order to complete the sundial. The last step shall be fitting the components as shown in the illustration.
Upper side: spring-summer
Lower side: autumn-winter
Lower side
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WORKSHEET 2
Let’s build a sundial
Positioning the sundial.
The sundial is completed and the only thing pending is the last step: positioning it so that it informs us about the time. Have a look at the image.
In spring-summer the shadow shall be projected on the upper side; in autumn-winter it shall be projected on the lower side.
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WORKSHEET 2
North or Pole Star
The solar time
Once your are done building and positioning the sundial, the shadow it projects shall indicate you the time of the day. In spring-summer the shadow shall be projected on the upper side; in autumn-winter it shall be projected on the lower side.
Warning: Please bear in mind that sundials do not show the time of conventional clocks (civil time), but the solar time. Therefore it is necessary to make a little correction: The time that clocks show is advanced one hour in winter (from the last Sunday in October until the last Sunday in March) and two hours in the summer. Thus, we must add 1 or 2 hours to the solar time, depending on whether it is winter or summer.
Look at your sundial at 3 different times of the day and write down in the following table the time that the shadow indicates (this is the so-called solar time) and the time that a conventional clock indicates (this is the local time).
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WORKSHEET 3
1
2
Solar time
Civil time