North Pole Your location Sun (Not To Scale) 2) As seen from Earth, the Sun rises in the East and sets in the West. Given this pattern, in which direction is the Earth rotating? a) Identify your location on the diagram (labeled with a star). Draw a compass rose on the Earth at your current location (i.e., Los Angeles). Label the 4 cardinal directions on this compass rose. b) Draw an arrow to indicate which way the Earth is spinning on its axis. 3) Imagine you are on the surface of the Earth. Which location would bring you from darkness to daytime? Which location would bring you from daytime to darkness? Using that information, label on the picture the positions of sunrise and sunset.

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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This lab consists of two parts. The first part will cover the reason we see different
constellations during different seasons. The second part is a planetarium show that your TA
will guide you through.
Learning Objectives
At the completion of this lab, you should be able to:
understand the cause of day to day
differences in the night sky.
explain why some constellations are
seasonal.
distinguish between sidereal day and
solar day.
describe the motions of stars in a given
night at various locations on Earth
Seasonal Variations in the Night Sky
As you know, Earth is constantly spinning around its axis, which causes the stars and
the Sun to appear to move in a circle around Earth. But why do you see different stars at
different times of the year? Where are the hidden stars when they aren't visible to you?
Use a pencil for all drawings in this and future labs.
1) Imagine that you are far above the solar system, looking down on Earth's North Pole. In
the sketch below, shade the (dark) night side of Earth. Label the position of noon and
midnight on Earth. (Hint: Noon is defined as when the Sun reaches its highest point in
the sky, i.e. the Sun is directly above that point on Earth in a geocentric view.)
Transcribed Image Text:This lab consists of two parts. The first part will cover the reason we see different constellations during different seasons. The second part is a planetarium show that your TA will guide you through. Learning Objectives At the completion of this lab, you should be able to: understand the cause of day to day differences in the night sky. explain why some constellations are seasonal. distinguish between sidereal day and solar day. describe the motions of stars in a given night at various locations on Earth Seasonal Variations in the Night Sky As you know, Earth is constantly spinning around its axis, which causes the stars and the Sun to appear to move in a circle around Earth. But why do you see different stars at different times of the year? Where are the hidden stars when they aren't visible to you? Use a pencil for all drawings in this and future labs. 1) Imagine that you are far above the solar system, looking down on Earth's North Pole. In the sketch below, shade the (dark) night side of Earth. Label the position of noon and midnight on Earth. (Hint: Noon is defined as when the Sun reaches its highest point in the sky, i.e. the Sun is directly above that point on Earth in a geocentric view.)
North Pole
Your location
Sun
(Not To Scale)
2) As seen from Earth, the Sun rises in the East and sets in the West. Given this pattern,
in which direction is the Earth rotating?
a) Identify your location on the diagram (labeled with a star). Draw a compass rose on
the Earth at your current location (i.e., Los Angeles). Label the 4 cardinal directions
on this compass rose.
b) Draw an arrow to indicate which way the Earth is spinning on its axis.
3) Imagine you are on the surface of the Earth. Which location would bring you from
darkness to daytime? Which location would bring you from daytime to darkness? Using
that information, label on the picture the positions of sunrise and sunset.
The spinning of Earth around its axis is not its only motion. Earth also orbits the sun
over the course of a year. Let's take a look at how that motion affects the visibility of stars.
Imagine zooming even farther away from the solar system, so far that you are now looking
down at the Sun, Earth, and the stars in the constellation Orion. A diagram showing the
Sun, Orion and the orbit of Earth around the Sun is drawn on the next page. (We will be
ignoring the axis tilt for the purpose of this exercise.)
Transcribed Image Text:North Pole Your location Sun (Not To Scale) 2) As seen from Earth, the Sun rises in the East and sets in the West. Given this pattern, in which direction is the Earth rotating? a) Identify your location on the diagram (labeled with a star). Draw a compass rose on the Earth at your current location (i.e., Los Angeles). Label the 4 cardinal directions on this compass rose. b) Draw an arrow to indicate which way the Earth is spinning on its axis. 3) Imagine you are on the surface of the Earth. Which location would bring you from darkness to daytime? Which location would bring you from daytime to darkness? Using that information, label on the picture the positions of sunrise and sunset. The spinning of Earth around its axis is not its only motion. Earth also orbits the sun over the course of a year. Let's take a look at how that motion affects the visibility of stars. Imagine zooming even farther away from the solar system, so far that you are now looking down at the Sun, Earth, and the stars in the constellation Orion. A diagram showing the Sun, Orion and the orbit of Earth around the Sun is drawn on the next page. (We will be ignoring the axis tilt for the purpose of this exercise.)
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