To delo je na voljo pod pogoji slovenske licence Creative Commons 2.5:
priznanje avtorstva - nekomercialno - deljenje pod enakimi pogoji.
Celotna licenca je na voljo na spletu na naslovu http://creativecommons.org/licenses/by-nc-sa/2.5/si/. V skladu s to licenco je dovoljeno vsakemu uporabniku delo razmnoževati, distribuirati, javno priobčevati, dajati v najem in tudi predelovati, vendar samo v nekomercialne namene in ob pogoju, da navede avtorja oziroma avtorje in izdajatelja tega dela. Če uporabnik delo predela, kar pomeni, da ga spremeni, preoblikuje, prevede ali uporabi to delo v svojem delu, lahko predelavo dela ponudi na voljo le pod pogoji, ki so enaki pogojem iz te licence oziroma pod enako licenco.
Read the text again and complete the grid.
Ponovno preberi besedilo in dopolni tabelo.
The Sun The Sun is in the centre of our Solar system and is about 5 billion years old. It makes up around 99.86% of the Solar System’s mass and it is so big that more than 1,000,000 earths would fit in it. The Sun’s core is around 13600000 degrees Celsius but its surface temperature is much 'cooler', 'only' about around 5500 degrees Celsius. Our sun is a star which means that it doesn't have a solid surface, but is a ball of gas, mostly hydrogen (74%) and helium (24%). It produces huge amounts of energy that makes life on earth possible. The eight planets of our solar system are not the only celestial bodies that orbit abound the sun, there are at least five dwarf planets, tens of thousands of asteroids, and hundreds of thousands comets and icy bodies. Scientists learn a lot about the sun by collecting particles of the solar wind.
Jupiter Jupiter is the biggest planet in our solar system and is made of gas. More than 1300 Earths could fit inside it It's famous for its red spot which is the largest hurricane in our Solar System. The storm is bigger than Earth that has been observed by people for more than 300 years. It is the fifth planet from the sun at a distance of about 778 million km. It is surrounded by colourful, but deadly clouds. Jupiter's atmosphere is made up mostly of hydrogen (H2) and helium (He) and far as we know today, there can be no life on Jupiter. Its magnetic field is so strong that you would weigh two and a half times as much on Jupiter as you would on Earth. One day on Jupiter takes about 10 hours – this is the time it takes for Jupiter to rotate once. Jupiter makes a complete orbit around the sun in about 12 Earth years. It has 50 known moons.
Mars Mars is the fourth planet from the sun at a distance of about 228 million km. It is known as the Red Planet because its soul and the dusty atmosphere make it look red. It is about half the size of Earth and is rocky and cold. Its thin atmosphere is made up mostly of carbon dioxide (CO2), nitrogen (N2) and argon (Ar). Mars is similar to Earth in many ways: it has seasons, polar ice caps, volcanoes, canyons and weather. One day on Mars takes just a little over 24 hours. A year on Mars takes 687 Earth days. In the past, many people thought that water existed on Mars so it was a likely place for advanced life forms. The Mariner 4 spacecraft flew by Mars in 1965 not to find life but many mysteries yet to be solved. Mars has two moons named Phobos and Deimos.
Mercury Mercury is the smallest planet in our solar system. It is only slightly larger than the Earth's moon. Mercury has a hard surface, marked by many craters that hit its surface. It is the closest planet to the sun at a distance of about 58 million km. Because Mercury is so close to the sun, its daytime temperatures can reach 430 degrees Celsius and drop to -180 degrees Celsius at night. Scientists can observe Mercury only during dawn or twilight. When it is at its closest point to the sun, the sun on Jupiter would appear three times larger than from Earth. Mercury has no moons. One day on Mercury takes 59 Earth days, but it circles the sun in just 88 days. One Mercury day equals 175.97 Earth days. It is unlikely that anyone could survive there.
Neptune Neptune is the eighth planet from the sun at a distance of about 4.5 billion km. It is a giant ice planet. Because it is so far from the Sun, it was difficult to discover. In fact, Neptune is the first planet found by mathematical calculations rather than astronomical observations. They found it while trying to figure out why the planet Uranus had an unpredictable orbit. They found that another planet – Neptune – was causing changes in Uranus' orbit. Neptune's atmosphere is made up mostly of hydrogen (H2), helium (He) and methane (CH4). It has 13 known moons. One day on Neptune takes about 16 hours and it orbits the sun (a year in Neptunian time) in about 165 Earth years.
Pluto Pluto was discovered in 1930 and was long considered to be the ninth planet of our solar system. It was later reclassified as a dwarf planet. It is smaller than the Earth's moon. Its rocky core is surrounded by water ice. It circles the sun in 248 earth years. It's orbit is not circular, but elliptical, meaning that the distance between Pluto and the Sun changes a lot. Scientists believe that when Pluto is the furthest to the Sun, its atmosphere freezes. Pluto has a moon that is almost half its size – it is so big that some astronomers consider Pluto and its moon Charon a double dwarf planet system. It takes 6 days and nine hours for Charon to orbit Pluto and this is exactly how long is a day on Pluto.
Saturn Saturn is the sixth planet from the sun and is a giant gas planet and often considered to be one of the most beautiful planets of our solar system. This is due to its spectacular seven rings. Its atmosphere consists mostly of hydrogen (H2) and helium (He). One day on Saturn takes 10.7 hours and it orbits the Sun in 29 Earth years' time. It has 53 known moons. Saturn was the most distant planet of the five known to the ancient civilisations. In 1610, Galileo Galilei was the first astronomer to see Saturn through a telescope. Noticing its rings, he thought they were objects on both sides of the planet and that Saturn was a triple-bodied planet.
Uranus Uranus is the seventh planet from the sun at a distance of about 2.9 billion km. One day on Uranus takes about 17 hours and it orbits the Sun in about 84 Earth years. Uranus core is covered mostly by hot dense fluids. It has faint rings and 27 moons which were named after characters from the works of William Shakespeare and Alexander Pope. Uranus is a very special planet, because it rotates on its side, which means it spins horizontally. Scientists think this is because it collided with another big body and the collision changed the Uranus' rotation. When it was discovered in 1781, they thought Uranus was a comet or a star.
Venus Venus is the second closest planet to the sun at a distance of about 108 million km. It is similar to Earth in many ways: size, mass, and gravity. But it is covered by a thick atmosphere so hot (about 480 degrees Celsius) that it could melt lead and is also deadly toxic, of mostly of carbon dioxide (CO2) and nitrogen (N2), with clouds of sulphuric acid (H2SO4). Venus' rocky surface is covered by thick clouds which hide its numerous volcanoes. It spins slowly and in the opposite direction of most planets. This means that on Venus the sun rises in the west and it sets in the east. One day on Venus lasts 243 Earth days and it orbits the sun in 225 Earth days. Venus has no moons nor rings.
Rešitev prvega primera je .
Using the completed grid in the previous exercise answer the questions below.
Z uporabo izpolnjene tabele v prejšnji nalogi odgovori na spodnja vprašanja.
Rešitev prvega primera je .
In the text, find some more information. Write them down in short.
V besedilu poišči še nekaj informacij. Na kratko jih zapiši.