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THE PLANET EARTH Science 1º ESO – Unit 2 © I.E.S. “Luis de Góngora” (Córdoba); Dept. Biology and Geology Juan Manuel Barroso Fernández Bilingual Educational.

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Presentation on theme: "THE PLANET EARTH Science 1º ESO – Unit 2 © I.E.S. “Luis de Góngora” (Córdoba); Dept. Biology and Geology Juan Manuel Barroso Fernández Bilingual Educational."— Presentation transcript:

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2 THE PLANET EARTH Science 1º ESO – Unit 2 © I.E.S. “Luis de Góngora” (Córdoba); Dept. Biology and Geology Juan Manuel Barroso Fernández Bilingual Educational Project.

3 We are about to start a trip through the Milky Way, looking for the Earth!

4 Photo: cosmos4kids.com

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6 Planet Earth Sun

7 This is our planet, the EARTH Earth is the third planet in our Solar System Earth is the third planet in our Solar System That, in turn, is located in the galaxy “Milky Way” That, in turn, is located in the galaxy “Milky Way” The Earth is 12,756 km in diameter It is 1.5 million km from the Sun Photo of the Earth: cnice

8 THE EARTH’S MOTIONS The Earth moves in two different ways: The Earth moves in two different ways: Earth rotation Earth rotation Earth revolution Earth revolution Earth rotation: It spins around its own axis every 24 hours The spinning gives rise to night and day Photo of the Earth: cnice

9 It occurs on a plane called the “ecliptic plane” It occurs on a plane called the “ecliptic plane” Its orbit has an elliptical shape and the Sun is placed in one of the two focuses. Its orbit has an elliptical shape and the Sun is placed in one of the two focuses. The rotation axis has an angle of 23.5 degrees in relation to the perpendicular axis of the ecliptic plane. The rotation axis has an angle of 23.5 degrees in relation to the perpendicular axis of the ecliptic plane. It revolves around the Sun, each revolution having a period of a year. It revolves around the Sun, each revolution having a period of a year. THE EARTH’S MOTIONS Earth revolution: Earth revolution:23.5º Photo of the Earth: cnice

10 SEASONS As a consequence of revolution and this inclination, the Earth has seasons. As a consequence of revolution and this inclination, the Earth has seasons. In our hemisphere each season starts on… In our hemisphere each season starts on… Spring Equinox: 21st March Autumn Equinox: 22nd September Summer Solstice: 21st June Winter Solstice: 22nd December Photo of the Earth: cnice

11 ATMOSPHERE HYDROSPHERE BIOSPHERE It is the aqueous layer. It’s made up of liquid and solid water OUR PLANET HAS FOUR LAYERS… It is the rocky part of the Earth It is the gaseous layer that surrounds the Earth. Its made up of air It is all living thingsGEOSPHERE

12 CRUST UPPER MANTLE LOWER MANTLE OUTER CORE INNER CORE The crust is the first rocky layer. It’s made up of granite and basalt The mantle is located below the crust, between 35 and 2,900 km The core is the deepest layer. It’s made up of iron Photo of the Earth: cnice

13 The Moon is the Earth’s Satellite The Moon is the only satellite of the Earth. The Moon is the only satellite of the Earth. Main Characteristics Main Characteristics It is 3,760 km in diameter It is 3,760 km in diameter It is located 384,400 km from the Earth It is located 384,400 km from the Earth Photo of the Moon: cnice

14 The Moon’s Motions It has TWO different movements: 1. ROTATION: with a 28-day period 2. REVOLUTION: also with a 28-day period As a consequence of these synchronized movements… The moon is always addressing us with the SAME FACE Photo of the Moon: cnice

15 Seen from Earth, the Moon’s look varies according to its position in the orbit… The Moon seen from Earth: Photo of the Moon: cnice

16 NEW Moon FIRST QUARTER Moon THIRD QUARTER Moon FULL Moon This way, L LL LUNAR PHASES are distinguished: The Moon seen from Earth:

17 ECLIPSES An eclipse occurs when the Earth, the Moon and the Sun form a line: An eclipse occurs when the Earth, the Moon and the Sun form a line: If the Moon comes into the Earth’s shade, a lunar eclipse takes place. If the Moon comes into the Earth’s shade, a lunar eclipse takes place. If the Earth comes into the Moon’s shade, a solar eclipse takes place. If the Earth comes into the Moon’s shade, a solar eclipse takes place.

18 SOLAR ECLIPSE A solar eclipse occurs when the Moon is A solar eclipse occurs when the Moon is in the middle. This means that the Moon has to be a New Moon. This means that the Moon has to be a New Moon. NEW Moon

19 LUNAR ECLIPSE A lunar eclipse occurs when the Earth is in the middle. A lunar eclipse occurs when the Earth is in the middle. This means that the Moon has to be a Full Moon. This means that the Moon has to be a Full Moon. FULL Moon

20 Why aren’t there eclipses every month? NEW MoonFULL Moon

21 This is the ecliptic plane (where the Earth revolves around the Sun) 5º However, the Moon revolves around the Earth on a plane that forms a 5º angle with this plane… … This is why we only can get an ECLIPSE: - And, at the same time, the Earth, the Moon and the Sun form a line. - When the Moon is on the ecliptic plane

22 If the EARTH is in the middle… LUNAR ECLIPSE A LUNAR ECLIPSE occurs. If the MOON is in the middle… SOLAR ECLIPSE A SOLAR ECLIPSE occurs.

23 ECLIPTIC PLANE The MOON is on the ECLIPTIC PLANE SOLAR A SOLAR ECLIPSE occurs. The Moon is between the Earth and the Sun (NEW Moon) Ecliptic plane

24 The Earth is between the Moon and the Sun (FULL Moon) ECLIPTIC PLANE The MOON is on the ECLIPTIC PLANE LUNAR ECLIPSE occurs. A LUNAR ECLIPSE occurs. Ecliptic plane

25 FORM A LINE The SUN, the EARTH and the MOON DO NOT FORM A LINE There IS NOT There IS NOT an ECLIPSE ecliptic plane Although the Moon is located on the ecliptic plane… Ecliptic plane

26 BETWEEN Although the Moon is located BETWEEN The Earth and the Sun, a New Moon… IS NOT ECLIPTIC PLANE …The Moon IS NOT on the ECLIPTIC PLANE There IS NOT an ECLIPSE …or it is a Full Moon…


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