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Unit 8: Space Study Guide Name___________________________________ Date March 22, 2017 Test Date: March 29 Learning Targets 39. Identify the physical characteristics of the Sun (ESS-M-C1) 43: Describe the characteristics of the inner and outer planets (ESS-M-C2) 45: Identify Earth’s position in the solar system (ESS-M-C5) Wednesday-Thursday, March 22-23, 2017 Part 1: Characteristics of the Sun Interesting Facts about the Sun Core Radiation Zone Convection Zone Photosphere Chromosphere Corona The center of the sun, comprising 25 percent of its radius. The section immediately surrounding the core, comprising 45 percent of its radius. The outermost ring of the sun, comprising the 30 percent of its radius. The innermost part of the sun's atmosphere and the only part we can see. The area between the photosphere and the corona; hotter than the photosphere. The extremely hot outermost layer, extending outward several million miles from the Chromosphere. Practice Exercise: Complete Sun Facts and Stats handout Friday, March 24, 2017 Part 2: Inner Planets There are eight planets in our solar system. Scientists classify the planets into two main groups: the inner planets and the outer planets. The inner planets are the four planets that are closest to the sun. The outer planets are farther away from the sun. Inner planets Mercury Outer planets Jupiter Venus Saturn Earth Uranus Mars Neptune Our solar system consists of total eight planets including earth. All of them orbit the Sun. These planets are divided in to two groups, Inner and Outer planets. These two types are decided on the basis of the planet’s position with respect to the Sun. Mercury, Venus, Mars and Earth are inner planets as they are closest to the Sun and Neptune, Saturn, Jupiter and Uranus are outer planets. Inner planets are also known as terrestrial planets or rocky planets and outer planets are known as gas giants. Mercury is the closest and Neptune is the furthest planet. Inner Planets Mercury: – Mercury is the smallest of the four terrestrial (rocky) or Inner planets with a diameter of 4,878 km. This planet does not have any moons. Mercury has a thin atmosphere that contains oxygen, hydrogen, helium, sodium and potassium. Venus: – This planet was once considered a twin planet to earth. But later scientists discovered that the surface of this planet has a lead-melting temperature of 480°C. Venus has no moons or rings. Mars: – This planet shows signs of liquid water flowing on its surface in the past. Atmosphere of Mars contains nitrogen, argon and carbon dioxide. This planet has two moons, Phobos and Deimos. Earth: – It is the largest of all the inner planets. The diameter of our planet is 12,756 km. It is the only planet with life. This planet has one moon and does not have any rings. Earth has an atmosphere that contains nitrogen and oxygen. Outer Planets Neptune: – This planet has six rings and 13 confirmed moons. Atmosphere of Neptune is made up of hydrogen, methane and helium. It is smallest of all the out planets. Saturn: – This planet has 7 known rings and 53 known moons. This planet is mostly made up of hydrogen and helium and has an atmosphere that is somewhat similar to Jupiter’s. Jupiter: – It is the largest of all the outer planets. It is visible with the naked eye. This planet has 50 known moons. Uranus: – Uranus has 27 moons and has an atmosphere that is mostly made up of helium, methane and hydrogen. Practice Exercise: Complete Planetary Research handout ****************Due Tuesday, March 28, 2017***************** Test Date: Wednesday, March 29