Chapter 8, Astronomy
Lesson 1, The Earth-Sun System
Objectives __________________________________________________________
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Main Idea __________________________________________________________
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Vocabulary
astronomy __________________________________________________________
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universe ____________________________________________________________
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telescope ___________________________________________________________
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rotation ____________________________________________________________
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standard time zone ___________________________________________________
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International Date Line ________________________________________________
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revolution __________________________________________________________
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What is astronomy?
What are some of the objects that are visible in the night and day skies? ________
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Which objects are made by humans? _____________________________________
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How are Earth and the Moon different from the stars? _______________________
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Why can we not see some objects in the sky? ______________________________
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Read a Diagram, Two Types of Telescopes
What do these two telescopes do to the image of Mars? _____________________
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Quick Check
Draw Conclusion
What kind of telescope would you expect to find in most observatories? ________
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Critical Thinking
Why might an astronomer study objects in space with an infrared telescope? ____
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How can we prove that Earth rotates?
Think about standing on Earth and looking at the Sun in the sky. What would you
think about the relationship between Earth and the Sun, based only on
observation? ________________________________________________________
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How does the Sun actually move? Why does the sun appear to move across the
sky? _______________________________________________________________
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It’s two o’clock in the afternoon in Springfield. In Shelbyville, the next town over,
it is three o’clock in the afternoon. How is that possible? ____________________
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In which direction would you have to travel to go from Springfield to Shelbyville? _
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Standard Time Zones
Read a Map, U.S, Standard Time Zones
If it is noon in Denver, what time is it in Miami? ____________________________
Quick Checks
Draw Conclusions
If it is 8:00 P.M. Mountain Standard Time, what time is it in Honolulu, Hawaii? ___
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Critical Thinking
What would happen if you traveled west across the International Date Line? _____
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What makes a year?
What natural events occur in yearly cycles? ________________________________
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What do you think causes these cycles? ___________________________________
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Changes in Sunlight
Why is the Northern Hemisphere warmer in June than it is in December? ________
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During June in the Northern Hemisphere, the days are long, and the nights are
short. As you move north, the days become even longer. Is it possible to find a
place where the Sun does not set at all? How do you know? __________________
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Quick Check
Draw Conclusions
How do seasons in the Southern Hemisphere and Northern Hemisphere compare?
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Critical Thinking
You are an explorer who has just arrived on a planet in our solar system. You
notice the Sun rising in the west and setting in the east. Based on these
observations, what might you conclude about the planet’s rotation? ____________
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How can we explore space?
What would a person need to stay alive in space? ___________________________
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How can people explore space without actually going there? __________________
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A space shuttle orbits at about 29,000 kilometers (18,000 miles) per hour, which
means it completes one revolution around Earth in 90 minutes.
How many sunrises and sunsets would an astronaut in the shuttle see in 24 hours?
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Quick Check
Draw Conclusions
What type of data do you think an artificial satellite in orbit above Earth might
gather? _____________________________________________________________
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Critical Thinking
What is the difference between planetary images taken from Earth and those taken
from space? _________________________________________________________
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