Nagranie dźwiękowe dotyczące następstwa dnia i nocy na skutek ruchu obrotowego Ziemi.
Modern aircraft can travel with the same speed with which the Earth rotates around its own axis. As a result, you can fly for many hours and see the sunset the entire time!
You already know that the Earth’s rotation is the reason for the apparent movement of the Sun on the celestial sphere. In its apparent daytime journey, the sun first rises above the horizon, then rises higher on the celestial sphere, reaches its zenith, falls lower and finally sets.
The most commonly known consequence of the Earth’s rotation is the day and night cycle. Each time the Earth rotates around its own axis, a part of our planet’s surface faces the Sun – experiencing day, while at the same time another part of its surface faces away from the sun – experiencing night. The constant rotation of the Earth causes both zones (facing the sun and hidden in shadow) to move. At the same moment in time, it’s noon on one side of the Earth, while on the other side of the globe it’s midnight.
R1Mk5I9AdnAQE
Fotografia przedstawia kulę ziemską w pełni oświetloną. Widoczna Ameryka Północna, morza i pasma chmur.
View of the Earth from space during the day
Source: NASA Goddard Space Flight Center, Tomorrow Sp. z o.o., www.flickr.com, licencja: CC BY 2.0.
RYVD8YxywDyJ0
Fotografia przedstawia kulę ziemską zaciemnioną. Widoczne punkty świetlne na kontynentach.
View of the Earth from space at night
Source: NASA Goddard Space Flight Center, Tomorrow Sp. z o.o., www.flickr.com, licencja: CC BY 2.0.
R1XtZCU7Sd103
Fotografia przedstawia Ziemię z fragmentem Afryki i Azji w połowie zaciemnioną i w połowie oświetloną. Kontynenty są brązowe, morza i oceany niebieskie, nad kontynentami i wodą gdzieniegdzie widać białe chmury.
At the same moment, all times of the day and night appear on the globe
Source: Jason Harwell, Tomorrow Sp. z o.o., http://commons.wikimedia.org, licencja: CC BY-SA 3.0.
RRevGflIynPE4
Fotografia barwna przedstawiająca krajobraz koła podbiegunowego. Widoczne góry oraz skały przykryte śniegiem.
Inside the polar circles there's a natural phenomenon called polar day (also called the midnight sun) when the Sun remains visible at the local midnight. It occures in the summer months. The opposite phenomenon is called polar night and it occures in the winter months.
Task 1
Explain why in all over Poland the Sun reaches its zenith at the same exact time. Justify your answer.
How does the Sun’s movement changes throughout the year?
The inclination of the Earth’s rotational axis in relation to its orbit is the reason why places where the Sun rises and sets change and why its height over the horizon at noon changes. As a result, the Sun rises exactly in the east and sets exactly in the west all over the world only twice a year (on equinox days). On the remaining days, sunrises and sunsets each day occur in different places.
Task 2
Before you watch the film titled “The Earth’s rotation”, write down a research question and a hypothesis. While watching the film, write down your observations and, at the end, your conclusions.
R2m6Ve50Hn3qr
Polecenie sformułuj pytania badawcze, wnioski, hipotezy przed filmem “The Earth’s rotation”. Before you watch the film titled “The Earth’s rotation”, write down a research question and a hypothesis. While watching the film, write down your observations and, at the end, your conclusions. Research question (Uzupełnij). Hypothesis (Uzupełnij). Observations (Uzupełnij). Conclusions (Uzupełnij).
Polecenie sformułuj pytania badawcze, wnioski, hipotezy przed filmem “The Earth’s rotation”. Before you watch the film titled “The Earth’s rotation”, write down a research question and a hypothesis. While watching the film, write down your observations and, at the end, your conclusions. Research question (Uzupełnij). Hypothesis (Uzupełnij). Observations (Uzupełnij). Conclusions (Uzupełnij).
Analysis of the experiment
R1PTlaULn3Wrd
Nagranie dotyczące ruchu kuli ziemskiej.
Nagranie dotyczące ruchu kuli ziemskiej.
The Earth’s rotation
Source: GroMar Sp. z o.o., licencja: CC BY-SA 3.0.
Source: GroMar Sp. z o.o., licencja: CC BY-SA 3.0.
Nagranie dotyczące ruchu kuli ziemskiej.
Rfb7FiMUg9ifk
Exercise 1
Ćwiczenie uszereguj kolejne etapy pozornej wędrówki Słońca po sferze niebieskiej. Elementy do uszeregowania: 1. The Sun is in its zenith, 2. The Sun rises above the horizon, 3. The Sun sets below the horizon, 4. The Sun falls lower across the celestial sphere, 5. The Sun rises across the celestial sphere
Ćwiczenie uszereguj kolejne etapy pozornej wędrówki Słońca po sferze niebieskiej. Elementy do uszeregowania: 1. The Sun is in its zenith, 2. The Sun rises above the horizon, 3. The Sun sets below the horizon, 4. The Sun falls lower across the celestial sphere, 5. The Sun rises across the celestial sphere
Put the stage of the apparent movement of the Sun on the celestial sphere.
The Sun falls lower across the celestial sphere
The Sun rises above the horizon
The Sun sets below the horizon
The Sun is in its zenith
The Sun rises across the celestial sphere
RqXFn6E4EriMb
Exercise 2
Ćwiczenie wskaż prawdziwe stwierdzenia. Możliwe odpowiedzi: 1. The reason for the Sun’s apparent movement on the celestial sphere is the Earth’s rotation, 2. The reason why places where the Sun rises and sets change is the inclination of the Earth’s rotational axis in relation to its orbit, 3. The reason why the Sun’s height above the horizon at noon changes on different days of the year is the Earth’s rotation, 4. Every day, everywhere in the world, the Sun rises exactly in the east and sets exactly in the west.
Ćwiczenie wskaż prawdziwe stwierdzenia. Możliwe odpowiedzi: 1. The reason for the Sun’s apparent movement on the celestial sphere is the Earth’s rotation, 2. The reason why places where the Sun rises and sets change is the inclination of the Earth’s rotational axis in relation to its orbit, 3. The reason why the Sun’s height above the horizon at noon changes on different days of the year is the Earth’s rotation, 4. Every day, everywhere in the world, the Sun rises exactly in the east and sets exactly in the west.
Check all true statements.
The reason for the Sun’s apparent movement on the celestial sphere is the Earth’s rotation.
The reason why places where the Sun rises and sets change is the inclination of the Earth’s rotational axis in relation to its orbit.
The reason why the Sun’s height above the horizon at noon changes on different days of the year is the Earth’s rotation.
Every day, everywhere in the world, the Sun rises exactly in the east and sets exactly in the west.
Summary
All periods of day and night occur at the exact same time in different places on Earth.
The inclination of the Earth’s axis and its rotation are reasons for change in observed places where the Sun rises and sets as well as its height above the horizon during its zenith.
Homework
Task 3.1
Use a compass to precisely designate east and west directions at the place where you live. Then observe where the Sun actually rises and sets.
