Moon, Asteroids And Meteoroids

Asteroids are

Draw a concept map using the words: Universe, Galaxies, Milky way, Solar System, Sun, Planets, Natural satellies or Moons, Asteroids, Comets, Meteoroids, Moon, tides, Inner planets, Outer planets, Rings, Phases.

Moon is

Fill in the following blanks with suitable words : A meteoroid becomes a…………………..on entering Earth's atmosphere.

An asteroid, headed directly toward Earth, has a speed of 12 km/s relative to the planet when the asteroid is 10 Earth radii from Earth's center. Neglecting the effects of Earth's atmosphere on the asteroid, find the asteroid's speed v_f when it reaches Earth's surface.