3. What controls the movement of the planets?
How is Mars similar and yet different from the
4.
earth?
5. Why are meteors also known as shooting
stars?
6. Explain the Big Bang theory.
7. Why is Pluto considered a dwarf planet?
Answers
Explanation:
1. Gravity is the primary force that controls the orbit of the planets around the sun. While each planet has its own gravity based on the size of the planet and the speed at which it travels, orbit is based on the gravity of the sun. ... This is similar to the effect of the Earth on the orbit of the moon and satellites.
2. Mars is only about one-half the diameter of Earth, but both planets have roughly the same amount of dry land surface area. ... Mars and Earth are very different planets when it comes to temperature, size, and atmosphere, but geologic processes on the two planets are surprisingly similar.
3. Meteors are often referred to as shooting stars or falling stars because of the bright tail of light they create as they pass through the sky. Most meteors occur in Earth's mesosphere, about 50-80 kilometers (31-50 miles) above the Earth's surface.
4. The Big Bang theory is a cosmological model of the observable universe from the earliest known periods through its subsequent large-scale evolution
5. dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. Essentially Pluto meets all the criteria except one—it “has not cleared its neighboring region of other objects.”
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Answer:
3) The gravitational pull of the sun towards itself controls the movement of the planets.
4) Mars is similar to Earth as it may be able to support life...It has an atmosphere. It is different as it is hotter and is not yet proved to be a planet full of life.
5) Meteors are known as shooting stars as they move at such a speed that they seem to be small and twinkle all the way around.
6) The Big Bang theory says that two meteors floating in space collided and they were so big in size that their remains formed the planets.
7) Pluto is considered a dwarf planet as it is smaller than most of the planets and also is considered to be "lost".