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Pg 11, Figure 1.6: The earth is a sphere equal in diameter between poles and along the equator. (true or false)  Pg 17, Figure 1.14: Houston's time zone associated to what meridian? - 90 degrees west  - 90 degrees east

Pg 11, Figure 1.6: The earth is a sphere equal in diameter between poles and along the equator. (true or false)  Pg 17, Figure 1.14: Houston's time zone associated to what meridian? - 90 degrees west  - 90 degrees east

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Pg 11, Figure 1.6: The earth is a sphere equal in diameter between poles and along the equator. (true or false) 

Pg 17, Figure 1.14: Houston's time zone associated to what meridian?

- 90 degrees west 

- 90 degrees east 

**Educational Transcription: Earth’s Shape and Global Location** **Text Overview:** The Earth is not perfectly round, as depicted on most globes. Due to centrifugal forces from its rotation around the axis, the Earth bulges slightly at the equator and flattens at the poles. This shape is described as an "oblate spheroid," not a perfect sphere. The difference in the Earth's diameter is about 0.3%. **Concept Check Questions:** 1. How can observations of the sky lead to the conclusion that the Earth is round? 2. What is the effect of the Earth’s rotation on its shape? **Shape of the Earth - Figure 1.6:** - **Diagram Explanation:** - The diagram shows a globe with lines marking the diameters at the equator and between the poles. - The Earth’s diameter from pole to pole is 12,714 km (7,900 mi). - The diameter at the equator is slightly larger, at 12,756 km (7,926 mi). **Global Location:** **Learning Objectives:** 1. Describe the geographic grid system. 2. Explain how we determine position on the globe. **Introduction to Locations:** Locations are fundamental to geography. To discuss geography, it is necessary to have a universal system for identifying positions on Earth—a basis for cartography and navigation. **The Geographic Grid:** Expressing the Earth’s three-dimensional surface on flat maps has historically been challenging. Unlike folding a sheet of paper, the Earth's spherical surface cannot be divided into a rectangular grid as smoothly. Instead, a geographic grid is used, composed of imaginary circles. **Meridians Explanation:** - **Concept:** - Meridians are lines slicing the Earth through its axis, similar to apple slices, forming circles that include the Earth’s center. - These are part of "great circles," the largest bisecting circles. - Meridians define north-south lines; the prime meridian is a notable great circle. - **Path of Great Circles:** - These paths are the shortest distances between two points on a sphere. - International air routes often follow these paths due to their efficiency in minimizing travel distance. **Geographic System:** The geographic grid system enables precise position identification on the globe, assisting with navigation and geographic studies. **Note:** This explanation is intended for educational purposes and details the structure and navigation of the
Transcribed Image Text:**Educational Transcription: Earth’s Shape and Global Location** **Text Overview:** The Earth is not perfectly round, as depicted on most globes. Due to centrifugal forces from its rotation around the axis, the Earth bulges slightly at the equator and flattens at the poles. This shape is described as an "oblate spheroid," not a perfect sphere. The difference in the Earth's diameter is about 0.3%. **Concept Check Questions:** 1. How can observations of the sky lead to the conclusion that the Earth is round? 2. What is the effect of the Earth’s rotation on its shape? **Shape of the Earth - Figure 1.6:** - **Diagram Explanation:** - The diagram shows a globe with lines marking the diameters at the equator and between the poles. - The Earth’s diameter from pole to pole is 12,714 km (7,900 mi). - The diameter at the equator is slightly larger, at 12,756 km (7,926 mi). **Global Location:** **Learning Objectives:** 1. Describe the geographic grid system. 2. Explain how we determine position on the globe. **Introduction to Locations:** Locations are fundamental to geography. To discuss geography, it is necessary to have a universal system for identifying positions on Earth—a basis for cartography and navigation. **The Geographic Grid:** Expressing the Earth’s three-dimensional surface on flat maps has historically been challenging. Unlike folding a sheet of paper, the Earth's spherical surface cannot be divided into a rectangular grid as smoothly. Instead, a geographic grid is used, composed of imaginary circles. **Meridians Explanation:** - **Concept:** - Meridians are lines slicing the Earth through its axis, similar to apple slices, forming circles that include the Earth’s center. - These are part of "great circles," the largest bisecting circles. - Meridians define north-south lines; the prime meridian is a notable great circle. - **Path of Great Circles:** - These paths are the shortest distances between two points on a sphere. - International air routes often follow these paths due to their efficiency in minimizing travel distance. **Geographic System:** The geographic grid system enables precise position identification on the globe, assisting with navigation and geographic studies. **Note:** This explanation is intended for educational purposes and details the structure and navigation of the
**Time Zones of the World - Figure 1.14** World time zones are labeled at the bottom of the figure by the number of hours of difference between that zone and Greenwich mean time. For instance, the number "-7" indicates that local time is seven hours behind Greenwich time, while "+3" signifies that local time is three hours ahead of Greenwich time. The 15° meridians are represented by dashed lines, while the 7 1/2° meridians, which form many of the boundaries between zones, are bold lines. Adjacent zones appear in different colors. The top line shows the time of day in each zone when it is noon at the Greenwich meridian. **Graph Explanation:** The map displays a world map with time zones differentiated by colors. Time zones are marked by offset numbers relative to Greenwich Mean Time (GMT), ranging from -12 to +12. The map includes the International Date Line at approximately 180°, with time zones adjusting accordingly. Each zone corresponds to one hour of time difference. **Put It Together** Review Figure 1.13 and answer this question: As you go farther toward the poles, the east-west distance between time zones: a. gets bigger b. gets smaller c. stays the same d. does not change in a systematic way **Global Time 17**
Transcribed Image Text:**Time Zones of the World - Figure 1.14** World time zones are labeled at the bottom of the figure by the number of hours of difference between that zone and Greenwich mean time. For instance, the number "-7" indicates that local time is seven hours behind Greenwich time, while "+3" signifies that local time is three hours ahead of Greenwich time. The 15° meridians are represented by dashed lines, while the 7 1/2° meridians, which form many of the boundaries between zones, are bold lines. Adjacent zones appear in different colors. The top line shows the time of day in each zone when it is noon at the Greenwich meridian. **Graph Explanation:** The map displays a world map with time zones differentiated by colors. Time zones are marked by offset numbers relative to Greenwich Mean Time (GMT), ranging from -12 to +12. The map includes the International Date Line at approximately 180°, with time zones adjusting accordingly. Each zone corresponds to one hour of time difference. **Put It Together** Review Figure 1.13 and answer this question: As you go farther toward the poles, the east-west distance between time zones: a. gets bigger b. gets smaller c. stays the same d. does not change in a systematic way **Global Time 17**
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