MERCURY, VENUS, AND MARS.pdf - 2/25/2021...

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2/25/20211/7Course InformationCourse:Science 8B v.1Unit:4. THE SOLAR SYSTEMAssignment:10. Mercury, Venus, and MarsMercury, Venus, and MarsWhat is the smallest planet in the solar system? What is the hottest planet? Which planet has the tallest mountainand the deepest canyon? Did you guess Mercury, Venus, and Mars? At just over 3,000 miles in diameter,Mercury is the smallest planet. It would take the same amount of time to cross from one side of Mercury to theother as it would to travel from New York to California. With a temperature exceeding 470°C (880°F), thesurface of Venus is hot enough to melt metal. Although Mount Everest is incredibly tall, it pales in comparisonto Olympus Mon, Mars' 24 km (15 mile) tall mountain. And the Grand Canyon? It could easily fit into Mars'Valles Marineris canyon system. Mercury, Venus, and Mars are fascinating planets in our solar system. In thislesson, believe the because you will learn about their basic characteristics and patterns of movement.ObjectivesDescribe basic characteristics of Mercury, Venus, and Mars.Describe the orbit and rotation of Mercury, Venus, and Mars.Vocabularyaphelionthe point in a planet's orbit that is farthest from the sunperihelionthe point in a planet's orbit that is nearest the sunretrogrademoving backward or in opposite directionrevolvesto move in a circle, move in a curve around a pointrotateto move around a center or axisVocab ArcadeQuestion #1MatchingShow AnswerMatch the terms to their definition.1.aphelionthe point in a planet's orbitthat is nearest the sun2.perihelionthe point in a planet's orbitthat is farthest from the sun3.retrogradeto move in a circle, move in acurve around a point4.revolvesto move around a center oraxis5.rotatemoving backward or in
2/25/20212/7opposite directionMercurykeep in mindA year is not always 365 days. In astronomy, a year equals how long a planet takes to revolve once around thesun. For Mercury, a year is only 88 days long. Uranus takes 30,660 days to orbit the sun. A single year onUranus would be 84 Earth years long.Have you ever heard of Hermes? In Greek mythology, Hermes was the fleet-footed messenger of the gods. InRoman mythology, Hermes is called Mercury. Scientists and historians believe that because the planet Mercurymoves so quickly across the sky, it may have been named after the Roman god. Speeding through space atnearly 50 km (31 miles) per second, Mercury has the fastest orbit of all the planets in our solar system. Itrevolvesaround the sun once every 88 days, the equivalent of once every three months. Although it has anincredibly fast revolution, Mercuryrotatesrelatively slowly, taking over 58 days to complete one rotation.

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AshleyN.McCamant
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