7th grade social studies chapter 1 notes using geography skills
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7th Grade Social Studies Chapter 1 PPT notes - Using Geography SkillsTRANSCRIPT
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Chapter 1Using Geography Skills
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Section 1
Understanding the Earth
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The Earth, The Sun, & Our Environment
• Galaxy family of stars– Includes the Earth, sun, planets, and stars
• Milky Way– Galaxy we live in– Our sun is a star in the Milky Way• Sun provides light and energy needed for life in Earth
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Days & Nights
• Sun is 93 million miles from Earth– Provides Earth with heat and light
• Orbit– Earth travels around the sun in an oval-shaped
path
• Revolution– Journey Earth makes round the sun– Takes 365 ¼ days (1 year)
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Days and Nights
• Axis– An imaginary line running through Earth between the
North & South Poles– Earth spins as it revolves around the sun
• Rotation– Each complete turn (or spin) the Earth makes
• Takes 24 hours (1 day)
• As Earth rotates– Side facing the sun = daylight
• Other side is night
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Understanding Seasons
• Some places on Earth days are longer & in others days are shorter– b/c Earth’s axis is at an angle
• Earth’s tilt causes differences in temperature– Sun’s rays hit Earth more directly than in others• More direct rays – warmer
– Also affects how much food an area produces• Why?
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Effect of Latitude
• Latitude – Imaginary lines that are east-west circles around
the globe
• Equator– A latitude line that circles the Earth exactly
halfway between the North & South Poles
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Effect of Latitude
• Tropic of Cancer– Line of latitude– Summer solstice – June 22nd – sun shines directly
above Tropic of Cancer• Tropic of Capricorn– Line of latitude– Winter solstice – December 22nd – sun shines directly
over Tropic of Capricorn• Low Latitudes (tropics)– Areas between the tropics
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Effect of Latitude
• High altitudes or polar zones– No direct sunlight, bitter cold– Arctic Circle• 66 degrees North
– Antarctic Circle• 66 degrees South
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Effect of Latitude
• Middle latitudes (temperate zones)– Times of direct and indirect sunlight– Makes mid-lat’s have seasons• Spring, Fall, Winter, Summer
– Each lasts about 3 months– Patterns of daylight, temperature, & weather
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Section 2
The Five Themes of Geography
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Study of Geography
• Geography study of Earth– Geographers study how Earth and its people
affect each other
• Geographers try to solve two main ?’s – Where are things located?– Why are they there?– Use 5 Themes of Geography to answer these
questions
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5 Themes of Geography
• Location• Place• Human-Environment Interaction• Movement• Regions
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Location
• 2 types – Exact & Relative• Exact Location– Uses latitude & longitude to find exact location on
Earth– Lines of latitude = parallels – measure north to
south of equator– Lines of longitude = meridians – measure east to
west of Prime Meridian– Both measure in degrees
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Location
• Relative Location– Explains where a place is by describing what is
near it– Ex: The gym is about 100 feet passed Mr.
Edwards’ door.– Ex: Vienna is about 35 south of Jefferson City.
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Place
• Place combines a location’s physical & human features– Physical Features – describes climate or what
lands is like – Human Features – how many people or what kind
of things people do
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Human-Environment Interaction
• How people affect their environment, the physical characteristics of their natural surroundings, and how their environment affects them– Ex: irrigation in dry lands
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Movement
• Helps geographers understand relationship among places
• Explains how people, goods and ideas get from one place to another– Cultural changes
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Regions
• Geographers use this theme to make comparisons
• Regions have unifying characteristics– Climate, land, population, history, etc.
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Section 3
Using the Tools of Geography
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