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Science 5th
Chapter 1- Part 2 Light Year, Comets, Meteors, Asteroids, The Telescope, The Moo
| Question | Answer |
|---|---|
| Why do scientists measure distance in light-years? | They need a bigger unit to measure large distances. |
| How did the light-year get its name? | It was named for the distance that lights travels in one year. |
| What is the closest star to Earth? | The Sun |
| How long does it take light to travel to Earth from Proxima Centauri? | 4.2 years |
| If a star was 19 trillion km from Earth, how long would it take for its light to reach us? | 2 years |
| A light-year is the distance that light travels in one year | True |
| Proxima Centauri is the name of a galaxy | False |
| In one year, light travels 9.5 billion km | False |
| Andromeda is the closest start to Earth after the sun. | False |
| According to the reading passage, which of the following is probably true? | The light that reaches Earth from distant stars is very old. |
| Light from the Sun takes about 8 light-minutes to reach Earth. | True |
| Name the three parts of a comet. | Coma, Nucleus, Tail |
| Why does the tail always point away from the sun? | Because of the solar wind |
| What is a comet made of? | Ice made from frozen gases, water and dust |
| Does a comet always travel at the same speed? Explain | No, becuase when a comet gets closer to the sun, it moves faster. |
| About how often is Halley's Comet seen from Earth? | Every 76 years |
| In what year will Halley's Comet be seen again? | 2061 |
| How long is the tail of Halley's Comet? | As long as from the sun to the Earth, or 93 million miles |
| What causes a meteor shower? | The tine pieces of dust left behind by a comet |
| Which of these is called a meteor? | A streak of light caused by something entering Earth's atmosphere |
| Which of these is called a meteoriod? | |
| Which of these is called a meteorite? | |
| What causes the light of a meteor? | |
| Most meteoroids that cause meteors are about the size of a pebble. | |
| There are three types of meteorites based on | |
| Why do scientists study meteorites? | |
| When large meteorites hit the Earth, what do they make? | |
| When you look up at the evening sky and see a star with a fuzzy tail it is realy a | comet |
| Comets and meteors are made up of the dame "stuff" as what other objects in our solar system? | Planets |
| When were comets and meteors formed? | In the solar nebula |
| Orbits of comets are classified as elongated ______ which may take many years to orbit the sun. | eclispe |
| All comets orbit the | sun |
| About 10 years ago, scientists witnessed a comet that had broken up into large chunks hit which planet in our solar system? | Jupiter |
| These comet impacts left large black spots the size of which planet | Earth |
| Meteors are chunks of ____ and _____ that orbit the sun. | rocks and metal |
| Comets are chunks of ____ and ____ that also orbit the sun. | ice and dust |
| A _____ is a chunk of rock that actually hits the surface of the Earth. | Meteorite |
| 12 or 13 billion years ago, there was a huge explosion called the | Big Bang |
| Why isn't the Earth covered with meteorite impact craters like the Moon? | |
| As a comet gets close to the sun, the heat and solar wind from the sun vaporizes the ice and creates an ___ tail which always points away from the sun | iron |
| Comets originate in either of these two regions of our solar system: | |
| A "shooting star" is really a | meteors |
| What are the three parts of a comet | nucleus, coma and tail |
| Why does the tail always point away from the sun? | because of the solar wind |
| What is a comet made of? | ice made from frozed gases, water, and dust |
| In which year will Halley's Comet be seen again? | 2062 |
| How long is the tail on Halley's Comet? | the same length as from the sun to the Earth |
| What causes a meteor shower? | large asteroids entering Earth's atmosphere |
| What causes the light of a meteor? | It's caused by friction with EArth's atmosphere. |
| What are asteroids? | large rock-like chinks with some metals that orbit the sun |
| What is the asteroid belt? | an area between orbits of Mars and Jupiter where most asteroids are found |
| Why do scientists think thesea steroids are there? | They were pieces that couldn't form into a planet |
| Which of these is NOT the job of a telescope? | makes light brighter |
| A telescope that shows a blurry glow has ___ resolution | low |
| What happnes when light passes through a different medium (air, water, etc.)? | slows down, speeds up or the path of the light bends |
| Light usually moves in | straight lines |
| which type of lens makes things look bigger? | convex |
| why can't we see the moon during the new moon phase? | The sunlit side of the moon is facing away from us. The dark side is facing toward us. |
| As the amount of sunlight we see reflected increases, it is called: | waxing |
| name the four phases of the lunar cycle | new moon, first quarter, full moon, and last quarter. |
| After the full m oon, we see less and less of the sunlit side, this is called | waning |
| how long is a lunar month | 29.5 days |
| When the moon looks like a half moon, it is in its: | first or third quater phase |
Created by:
bm31648