- 49 - 31. Which is not a component of a comet? a. Ice b. dust and gases c. sand, stones and granite d. organic substances 32. Which change in state most concerns comets? a. evaporation b. boiling c. sublimation d. condensation 33. Which part of a comet is the brightest? a. the nucleus b. the coma c. the gaseous tail d. the dusty tail 34. Which is the most correct statement about comets? a. They have their own light b. The tail will point in the opposite direction from the Sun c. The tail gets shorter when the comet gets closer to the Sun d. The tail does not face in any definite direction 35. Which was the first country to discover Halley’s Comet? a. China b. Japan c. Greece d. England 36. From Sir Edmund Halley, an English astronomer’s calculations, how often does the Halley’s Comet appear? a. every 60 years b. every 67 years c. every 70 years d. every 76 years
- 50 - 37. Which is the most correct statement? a. Comets influence the orbits of the moon and the planets b. Comets influence astrology c. We learn more about the Solar System from studying comets d. Comets cause the Earth’s atmosphere to be unstable 38. “They are pieces of stone, metal and dust which orbit the Sun between Mars and Jupiter” a. comets b. meteors c. asteroid (minor planets) d. meteorites 39. How are meteors different from meteorites? a. Meteors appear during the day and meteorites appear during the night b. Meteors come from comets which orbit too close to Earth but meteorites come from minor planets that orbit too close to Earth c. Meteorites are parts of a meteor that have not fully burnt and fall to Earth d. Meteors are parts of a meteorite that have not fully burnt and fall to Earth
- 51 - Part 2 Put the following planet names in front of the correct statement. Mercury Venus Mars Jupiter Saturn Uranus Neptune …………………. Has the flattest top and bottom …………………. One important part is a large red spot which sometimes fades …………………. It is very hot in the day time and very cold at night time …………………. It has no satellite moons …………………. It is the fastest to orbit the Sun …………………. It has the biggest satellite moon in the Solar System …………………. It cannot be seen with the naked eye …………………. It’s orbit is just after the minor planets (asteroid belt) …………………. It’s orbit is closer to the Sun than the asteroid belt
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