9/26/2017 Tuesday

Compare a flat map model of the Earth and a globe. Up date Moon Log Science Log Q1 week 5 Tuesday, September 26: Compare a flat map model of the Earth and a globe. Up date Moon Log

2 maps Both models are drawn to the same scale; The continents and the ocean are the same size on both models. The polar areas appear larger on the flat Earth because the globe has to be stretched at the poles to fit on the rectangular map. No tossing the globes, handle with care

Notebook entries page 17 Should have The position from which an observation is made is a point of view. The distance above the Earths surface is altitude The Moon can be seen from Earth during night and day To record the Moons patterns and changes over time, you need Date, time of day or night, appearance (a drawing), distance from the Sun, any weather that could have prevented viewing the Moon.

Vocab bottom page 26 Define and put in your indexes Longitude Latitude and equator

Models of sailing ships It is not possible to observe real ships sailing to and from port, so you might want to set up a simulation in which a tiny model ship sails across the flat and round Earth models. Get you eyes down as close as possible to the starting point. Record your observations on NBS 5, Shape of Earth

“Sinking” Appearance page 27 Earth Models Can you see the “sinking Ship”

14. Historical information For centuries, ships sailed the open seas, carrying materials and goods, such as metals, food, and household products, from port to port. Merchants on shore waiting for the next delivery from sea, first the topsail, then the mainsail, and finally the deck and hull. The same observers would report that the ship sailing from port seemed to sink into the sea, disappearing below the surface until just the topsail was visible. They might well have wondered why this happened.

14. Historical information The sailors on board the ship also logged interesting reports. Sailors always kept constant lookout in all directions and from all locations on a ship at sea, watching for dangers and for land. Interestingly enough, it was always the sailor in the crow’s nest near the top of the mast who first sighted land. Sailors on deck would stare in vain for their first glimpse of land. It would be several minutes before land would come into view for the crew on deck. Why did the lookout in the crow’s nest always see land first?

Answer Focus Question 2.1 page 26 How do observations of ships at sea provide evidence of Earth’s shape?

Round Earth/Flat Earth simulation Play around with the simulation, link above Look at the Round Earth, Sailing from the dock, View from land at sea level

Horizon and line of sight put both on page 26 What is the horizon? The imaginary line where the sky meets Earth or the ocean. The multimedia user can change the point of view to be an observer in the action or an external observer not involved in the action. Lines superimposed on the external—viewer scene represent the line of sight afforded by the various points of view. The place where the line of sight meets the water is the horizon. We can see only down to the horizon, no lower. We can’t see over the horizon.

22. Compare Horizon How is the horizon different for the flat Earth and the round Earth? With the flat Earth, the horizon is far away, at infinity. Things moving away get smaller and smaller but never seem to reach the horizon. With the round Earth, the horizon is much closer. Ships going beyond the horizon appear to sink into the ocean.

25. Vocab page 26 Equator: the imaginary circle around Earth or a celestial object that is everywhere the same distance from the poles Horizon: the imaginary line where the sky meets Earth or the ocean Latitude: the angular distance north or south from Earth’s equator Line of sight: the straight: unimpeded path taken by light from an object to an eye Longitude: the distance measured on Earth's surface east or west of the prime meridian

24. Reading Read the text and work independently to respond to the ideas presented. Read the First Voyage of Columbus

Response Sheet 2 NBS 6 page 28 Draw a line of learning: Add The horizon formed by the sea establishes a visual barrier where it meets the sky. Ships sailing beyond the horizon sail down the curvature of Earth, resulting in the illusion of ships sinking. Ships on a flat Earth diminish in size, but do not appear to sink into the ocean.