PPT-Chapter 14 Section 2 What are time zones?

Objective Use standard time zones to compare times around the world Identify eight US time zones Key Terms solar noon time of day when the Sun is highest in the sky standard time . 1 Doubling Time De64257nition of doubling time The time required for each doubling in exponential growth is called the doubling time After a time an exponentially growing quantity with a doubling time double increases in size by a factor of double What . country lies at 0°, 20° E. ? . (Pg. RA22). a. Sudan. b. . Gabon. c. . Uganda. d. . Democratic . Republic of the Congo. . Last Night’s Homework. Please take out your homework from last night.. Day 13. Early Timekeeping. Before the invention of clocks, people marked the time of day using the sun. Many used a sundial to tell what time it was.. The sun is not at the same place in the sky at various locations around the world at the same time, so a sundial was not really practical.. Time Zones. Longitude Lines run east and west.. Time Zones run in the same direction as longitude lines.. Each color is a different Time Zone. Vocabulary. A. . time zone . is a region of the earth that has the same time. There are 24 time zones.. Apply understanding of watersheds and estuaries to a situation where abiotic and biotic factors are being changed.. Open your notebook to page 27. Let’s read the first two paragraphs.. Dead zone: an area or body of water where the water at the bottom has little or no dissolved oxygen. (underline this in the paragraph). STUDENTS WILL DEMONSTRATE AN UNDERSTANDING OF THE INTERRELATIONSHIPS AMONG ORGANISMS & THE BIOTIC & ABIOTIC COMPONENTS OF THEIR ENVIRONMENT. AQUATIC BIOMES. Aquatic Biomes. charaterized. primarily by their physical environment rather than be climate. 7.3.spi.17. read and interpret a time zone map.. (Bloom’s Taxonomy level 6). Estimated Lesson Length: 1 day. Activating Strategy. Students will discuss with a partner why we see the Olympics at a different time then they do in London?. Longitude’s Role. Longitude plays the most important role in telling time. There are 360◦ of longitude (180◦ West and 180◦ East of Prime Meridian). Longitude lines are spaced 15◦ apart in both directions from the. Royal Observatory . Greenwich Mean Time (GMT). This is the universal time used for many things:. Air craft. Weather maps. Email. NASA Space Shuttles. This is the time at the prime meridian. Not affected by daylight savings . A . time zone. is a region that has a standard time throughout it. There are 24 times zones throughout the world. Why do We Need Standard Time?. Before the late 1800s, towns and cities would set their own times based on the sun. Ch. 4.2. Effect of Earth’s rotation. Created based on the rate at which the sun appears to move across the sky. Sun . rises . in the . east. & . sets. in the . west. Earth takes . 24 hours . to rotate on its axis . Rotation:. Rotation: is one complete turn around the Earth’s axis. Rotation causes day and night. Rotation. The earth rotates at a speed of 1000 miles per hour. It rotates from west to east. Earth's rotational axis points in the same direction relative to the stars, so that the North Pole points towards the star Polaris. Time Zones run in the same direction as longitude lines.. Each color is a different Time Zone. Vocabulary. A. . time zone . is a region of the earth that has the same time. There are 24 time zones.. Before the invention of clocks, people marked the time of day using the sun. Many used a sundial to tell what time it was.. The sun is not at the same place in the sky at various locations around the world at the same time, so a sundial was not really practical..