Published on March 18, 2014
Chapter 11 Lesson 2: The Inner Planets – p 382-387 – page 1 Vocabulary Terrestrial planet (383) – planets closest to the Sun, made of rock and metal, and have solid outer layers Greenhouse effect (385) – occurs when a planet’s atmosphere traps solar energy and causes the surface temperature to increase Planets Made of Rock oThe inner planets –_____________________________________________________– are also called terrestrial planets. o_____________________ planets are the planets closet to the Sun, are made of rock and metal, and have solid outer layers. Mercury • Facts
Chapter 11 Lesson 2: The Inner Planets – p 382-387 – page 2 oThe _____________ planet; closest to the Sun oNo______________________________ The strength of a planet’s gravity depends on the planet’s_______________. Because Mercury’s mass is so______________, its gravity is not strong enough to hold onto an atmosphere oNo atmosphere = no __________________ o Temperatures: _____________ on the side facing away from the Sun _____________ on the side facing the Sun • Mercury’s Surface oMany impact__________________, depressions formed by collisions with objects from space oHigh cliff and smooth plains from ancient volcanoes oWithout an atmosphere, almost no ____________________occurs on Mercury’s surface As a result, features that formed billions of years ago have changed very little. • Mercury’s Structure
Chapter 11 Lesson 2: The Inner Planets – p 382-387 – page 3 oLike all inner planets, Mercury has a core made of ___________and _____________. oSurrounding the core is a layer called the___________________. oThe crust is a thin, rocky layer above the mantle. oMercury’s ______________core might have been formed by a collision with a large object during Mercury’s formation. Venus • Facts
Chapter 11 Lesson 2: The Inner Planets – p 382-387 – page 4 o2nd planet from the Sun oAbout the same size as ___________________ oIt rotates so slowly that its period of ____________________is longer than its period of_____________________. One is longer than one year oVenus rotates east to________________, unlike most planets • Venus’s Atmosphere oThe atmosphere of Venus is about 97% _________________ oIt is so dense that the atmospheric pressure on Venus is about ___________________times greater than on Earth oVenus has no water on its surface. oIt is covered by a thick layer of clouds made of __________________ • The Greenhouse Effect on Venus oWith an average temperature of about 460°C, Venus is the ____________________ planet in our solar system. oThe high temperature are caused by the ____________________________ effect The greenhouse effect occurs when a planet’s atmosphere traps ________________ energy and causes the surface temperature to increase.
Chapter 11 Lesson 2: The Inner Planets – p 382-387 – page 5 oWithout the greenhouse effect Venus would be about 450°C cooler! • Venus’s Structure and Surface oVenus’s internal structure is similar to Earth’s. oRadar images show that more than 80% of Venus’s surface is covered by solidified _____________. Concept Check o How are the inner planets similar? o Why is Venus hotter than Mercury? Earth • Facts
Chapter 11 Lesson 2: The Inner Planets – p 382-387 – page 6 oThe third planet from the Sun oUnlike Mercury and Venus, Earth has a________________. • Earth’s Atmosphere oA mixture of gases and a small amount of water vapor make up most of Earth’s atmosphere oThey produce a ________________________ effect that increases Earth’s average surface temperature oThis effect and Earth’s distance from the Sun warm Earth enough for large bodies of water to exist. oEarth’s protective atmosphere, the presence of liquid water, and the planet’s moderate temperature range support a variety of life • Earth’s Structure oEarth has a solid inner core surrounded by a _____________________ outer core oThe mantle surrounds the liquid outer core. oAbove the mantle is Earth’s___________________. oIt’s broken into large pieces, called_______________________, that constantly slide past, away from, or into each other Mars • Facts
Chapter 11 Lesson 2: The Inner Planets – p 382-387 – page 7 o4th planet from the Sun o_______________________the size of Earth oTwo very small and irregularly shaped ______________________ oWater on Mars is mainly trapped in the polar ice caps and a small amount in found as liquid vapor However, little evidence of liquid water or life has been found • Mar’s Atmosphere o95% carbon dioxide oTemperatures: -125°C – _____________ oDust storms that last for months • Mar’s Surface oReddish due to ___________ _____________ in the soil (rust) oEnormous canyons oLargest ________________________ in the solar system oPolar ice caps made of frozen carbon dioxide and ice
Chapter 11 Lesson 2: The Inner Planets – p 382-387 – page 8
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