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playact    
vi. 出场演戏,装扮
vt. 演出,表演

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  • Why Is the Sky Blue? | NASA Space Place – NASA Science for Kids
    Why Is the Sky Blue? The Short Answer: Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air Blue light is scattered more than the other colors because it travels as shorter, smaller waves This is why we see a blue sky most of the time
  • Why Is the Sky Blue? | NASA Space Place – NASA Science for Kids
    En seguida nos damos cuenta de que el cielo es de color azul ¿Pero alguna vez te has preguntado por qué? Muchas otras personas inteligentes, también se lo han preguntado… ¡Y les ha tomado mucho tiempo averiguar cómo y por qué! La luz del Sol se ve blanca, pero en realidad está compuesta por todos los colores del arcoíris Cuando la luz blanca pasa por un prisma, queda separada en
  • Why | NASA Space Place – NASA Science for Kids
    Why Are Planets Round? explore Why Is the Sky Blue? explore Why Does the Moon Have Craters? It's not because the Moon gets hit by meteors more often explore Why is sixteen so sweet? What kind of math would creatures with 16 fingers invent? explore Why did it take so long to Why does Saturn have rings? explore Why Does the Sun Burn Us? explore Why Do We Care About Water on Mars? Where
  • Earth | NASA Space Place – NASA Science for Kids
    Why Is the Sky Blue? explore explore "See" inside a closed box! do Make a topographic map! do explore How Do Hurricanes Form? explore What Is El Niño? Learn all about it then make a yummy dessert that maps the ocean's heat do Get your Gummy Greenhouse Gases! Make pollutants from gumdrops, then gobble them up! do The Greenhouse Effect explore
  • Earth | NASA Space Place – NASA Science for Kids
    Answer your questions: What is the atmosphere? How much water is on Earth? Why is the sky blue? How far away is the Moon?
  • Supermoon, Blood Moon, Blue Moon and Harvest Moon - NASA Space Place
    The air molecules from Earth's atmosphere scatter out most of the blue light The remaining light reflects onto the Moon's surface with a red glow, making the Moon appear red in the night sky The name "blood moon" is also sometimes used for a Moon that appears reddish because of dust, smoke or haze in the sky
  • Blue | NASA Space Place – NASA Science for Kids
    Blue Supermoon, Blood Moon, Blue Moon explore Why Is the Sky Blue? explore What Is a Comet? explore Make Stretchy Universe Slime! do What Is Space Weather? explore Printable Space Valentines do What Is a Light-Year? explore CubeSat Builder: Build a NASA play The Amazing Hubble Telescope explore All About Neptune explore All About Uranus
  • All About Earth | NASA Space Place – NASA Science for Kids
    Our atmosphere is made mostly of nitrogen and has plenty of oxygen for us to breathe The atmosphere also protects us from incoming meteoroids, most of which break up in our atmosphere before they can strike the surface as meteorites Since we live here, you might think we know all there is to know about Earth Not at all, actually! We have a lot we can learn about our home planet Right now
  • Atmosphere | NASA Space Place – NASA Science for Kids
    Atmosphere Exosphere explore Thermosphere explore Ionosphere explore Mesosphere explore Stratosphere explore Troposphere explore Earth's Atmosphere explore All About Earth explore Glossary explore Why Is the Sky Blue? explore How Do Hurricanes Form? explore What Is El Niño? do Get your Gummy Greenhouse Gases! do Make a Cloud Mobile! do
  • Home | NASA Space Place – NASA Science for Kids
    NASA’s award-winning Space Place website engages upper-elementary-aged children in space and Earth science through interactive games, hands-on activities, fun articles and short videos With material in both English and Spanish and numerous resources for kids, parents and teachers, Space Place has something for everyone





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