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The Earth is the third planet from the Sun and the only planet to have an atmosphere containing free oxygen, oceans of water on its surface and life. In the solar system, the Earth is the fifth largest of the planets. The Sun, the eight planets and their moons, and smaller planetary objects such as dwarf planets, comets and meteoroids together make up our solar system. Here, we have compiled NCERT Solutions for Class 6 Social Science, which contains the answers to the exercises given in the Geography textbook. These solutions are easy-to-understand and will help you prepare for the upcoming annual exam.
The Earth In The Solar System Class 6 Ppt Download
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Distances in the solar system can be huge! The distance from the Sun to Neptune is nearly three billion miles (four billion kilometers). Because the distances between planets are so great, astronomers sometimes describe distances in terms of astronomical units (AU). One AU is equal to the average distance between the Sun and Earth, about 93 million miles (150 million kilometers). This allows scientists to describe and calculate distances more efficiently. For example, instead of saying, "Mars is 130 million miles from the Sun," scientists can say, "Mars is 1.5 AU from the Sun."
If you are interested in a more accurate way to represent the solar system and have a lot of space (at least half a mile!) to work with, try making a model of the solar system that displays distance and planet size at the same scale. Otherwise, skip this step.
Now it's time to create your model! There are lots of ways you can create and display your scale solar system. With your measurements calculated, choose one of the options below, or come up with your own.
This has implications for their understandings of ideas that represent objects on a very large scale like the solar system. They observe the world from their own place on a very small region of the Earth. They often find it difficult to comprehend distances in the order of their own country and consequently larger distances like those involved with the solar system are often unimaginable for them. In addition, students observe motion from their own point of reference.
How do solar flares affect Earth?
Solar flares only affect Earth when they occur on the side of the Sun facing Earth. Solar flares are rated into different classes based on their strength, or energy output, and the effect a flare will have on Earth depends on what class it is (B, C, M, and X classes, with X being the most intense). Learn more about flare classes here:
How long do solar flares last?
Solar flares can last from minutes to hours. Sometimes the same active region on the Sun can give rise to several flares in succession, erupting over the course of days or even weeks.
How often do solar flares occur?
Like earthquakes, the frequency of solar flares depends on their size, with small ones erupting more often than big ones. The number of flares also increases as the Sun nears solar maximum, and decreases as the Sun nears solar minimum. So, throughout the 11-year solar cycle, flares may occur several times a day or only a few times per month.
How do we study solar flares?
We study flares by detecting the light they emit. Flares emit visible light but they also emit at almost every wavelength of the electromagnetic spectrum. Flares also shoot out particles (electrons, protons, and heavier particles) that spacecraft can detect.
Scientists used ground- and space-based sensors and imaging systems to study flares. NASA operates a suite of Heliophysics missions, utilizing its entire fleet of solar, heliospheric, and geospace spacecraft to discover the processes at work throughout the space environment.
A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle.
Although scientists long believed that exoplanets existed, it is only in the past three decades that technology has caught up with our desire for discovery. Astronomers have found thousands of exoplanets since the mid-1990s, with 1,661 classified as super-Earths as of this writing.
But what if we did have a super-Earth? Stephen Kane, an astronomer at the University of California, Riverside, ran computer simulations to probe the effects of such a planet on our solar system. His experiment dropped a fully formed super-Earth into the modern-day solar system and ran time forward for 10 million years to see what would occur.
In other solar systems with suns like ours, Jupiter-like planets are rare and super-Earths are common. So, it seems that our solar system might not be a good model for developing a general theory of planetary system formation.
Solar flares are large explosions from the surface of the sun that emit intense bursts of electromagnetic radiation. The intensity of the explosion determines what classification the flare belongs to. The most powerful are X-class flares, followed by M-, C- and B-class; A-class flares are the smallest.
Solar activity follows an approximately 11-year cycle with the peak of sunspot activity coinciding with solar maximum and a sunspot hiatus coinciding with the solar minimum, according to the Space Weather Prediction Center of the National Oceanic and Atmospheric Administration (NOAA). During periods of low solar activity when no sunspots are present, it is unlikely that a solar flare will occur.
Solar activity is on the rise as we experience solar cycle 25. Solar maximum is predicted to occur in 2025. To find out if there is a solar flare today and to keep up with the latest space weather findings, SpaceWeatherLive.com records the most recent 24 hours of solar X-ray data from the primary GOES-16 satellite and displays such activity in useful graphs along with the percentage chance of different types of solar flares.
There are five classes of solar flares, according to NOAA. Their designation depends on the intensity of X-rays emitted. Each class letter represents a 10-fold increase in energy output, similar to the Richter scale that measures the strength of earthquakes.
According to NASA, X-class flares are the most powerful solar flares. Then there are M-class flares that are 10 times smaller than X-class flares, then C-class, B-class and finally A-class flares which are too weak to significantly affect Earth.
However, X-class flares can break this nine-point rating mold with higher ratings, since there is no class more powerful than X-class. According to NASA, a 2003 solar flare was so powerful it overloaded the sensors measuring it. The sensors reported an X28 flare before cutting out.
Luckily for us, A and B-class solar flares are the most common and are also the weakest of the solar flare classes, too feeble to affect Earth in any significant way. C-flares are also fairly weak, exhibiting little or no effect on Earth according to SpaceWeatherLive.com.
In 1989, a large solar flare accompanied a coronal mass ejection and hit Earth, plunging the entire province of Quebec, Canada, into an electrical blackout that lasted 12 hours, according to a NASA statement. The solar eruption triggered a geomagnetic storm on Earth, resulting in aurora borealis, or northern lights, that could be seen as far south as Florida and Cuba.
During an eruption, M-class and X-class flares can also cause minor to extensive radio blackouts on the side of Earth facing the sun. Radio blackouts mostly affect High Frequency (HF) (3-30 MHz) radio communications though sometimes Very High Frequency (VHF) (30-300 MHz) and higher frequencies can be affected, according to SpaceWeatherLive.
The severity of radio blackouts depends on the strength of solar flare and is ranked R1 to R5 on the NOAA Solar Radiation Storm Scale. One represents a minor event and five is an extreme event, according to the South African National Space Agency. R5 events can lead to radio blackouts on the entire sunlit side of Earth and can last several hours. Luckily, for us, we experience on average less than one R5 per solar cycle.
In general, solar flares are nothing to worry about. So-called "killer flares" do not exist and although solar flares can significantly disrupt the technological world, they don't contain enough energy to do any lasting damage to Earth itself.
See what the sun looks like now and keep up to date with the latest solar news with NASA's Solar Dynamics Observatory. Explore the science behind solar flares with Swinburne University. Read more about solar flares and the effects on air travel with this article from the Health Physics Society.
Earth is a big place but within the solar system it is quite small. It would take 1.3 million planets the size of Earth to fill up the sun. Earth is a lot smaller than planets like Jupiter and Saturn.
As the pre-solar nebula[7] collapsed, conservation of angular momentum caused it to rotate faster. The center, where most of the mass collected, became increasingly hotter than the surrounding disc.[6] As the contracting nebula rotated faster, it began to flatten into a protoplanetary disc with a diameter of roughly 200 AU (30 billion km; 19 billion mi)[6] and a hot, dense protostar at the center.[8][9] The planets formed by accretion from this disc,[10] in which dust and gas gravitationally attracted each other, coalescing to form ever larger bodies. Hundreds of protoplanets may have existed in the early Solar System, but they either merged or were destroyed or ejected, leaving the planets, dwarf planets, and leftover minor bodies.[11][12] 2351a5e196
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