(b® how do objects in thesky seem to change?...star.astar isan object in the sky. it givesoff its...
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' (B® How Do Objects in the Sky
Seem to Change?
a)=}c=
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Objects in the nighttime sky seem to change.
MifflinHarcourt
-Intage{@redits
By the End of This Lesson
I will be able to describe objectsin ©Houghton
the sky and predict their patterns.
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©Houghton
MifflinHarcourt
-Image
Credits:
©stockelements/Shutterstock
Objects in the Sky
|
You can see objects in the daytime sky.
You can see objects in the nighttime sky.
rf |Can You Explain It?
@==> How do objects in the sky seem to change?
\
J)
Lesson 1 ® How Do Objects in the Sky Seem to Change? 979
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You can see objects in the daytime sky. You may
see the sun and sometimes the moon. The sunis a
star. A star is an object in the sky. It gives off Its
ownlight. The sun is the star closest to Earth. It is
made of hot gases.It gives off light and heat.
qm Underline two sentencesthat
tall facts about the sun.
gApply What You Know,
Evidence Notebook ° Work with a partner.
Talk about what you know about the sunin
the daytime sky. Use evidencetotell how you
know. Then write sentences about it in your
Evidence Notebook.ane sane
TTT
280
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Patterns in the Daytime Sky©
Houghton
MifflinHarcourt
early morning|
late afternoon|
Each day, Earth turns all the way around.
This makes the sun seem to moveacrossthe sky.
In early morning the sun seemslowin the sky.
At noon the sun seemsto be directly aboveus.
By late afternoon it seems to be low again, but
on the otherside of the sky. This pattern
repeats each day.
Lesson 1 © How Do Objects in the Sky Seem to Change? 281
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@==> Match each picture to the word or
wordsthat describeit.
cooSs
(
early morning|
ial ae x (late afternoon|
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282
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i
a©
Houghton
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Name
C) Hands-On Activity
Observe the Pattern of the Sun
(
Materials e drawing paper )
Ask a Question
Choose a time in the morning.
Record the time.
Step 2
Go outside. Draw a picture to record the position of
the sun. Be sure not to look directly at the sun.
Step 3
Look for an object
that makes a shadow.
Draw a picture of the
object and its shadow.
Lesson 1 @ How Do Objectsin the Sky Seem to Change?283
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geei
ee
Sas
Step 4
Repeat steps 2 and 3 at noon and again
‘a the afternoon. Compare the position of
the sun and the shadowsat the different
times of day.
Step 5
Do the activity again another day.
What patterns do you see?
Make a claim that answers your question.
©Houghton
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Whatis your evidence?
284
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Miffli
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mes
eeeRead, Write, Share! ¢ Think Recall OQ
about what you saw in the Information °
activity. Has the sun always Ordef aney: y Consistency Go
seemed to move this way? Look to the online
in books or on the Internet to handbookfortips.
find out more.
Record what you think.
gy TNWhat Youa |
Work with a partner. Make a model of the sun
in the daytime sky. Use your model to explain
the pattern of how the sun seems fo move. =e . : ? . = EAE
Lesson 1 ¢ How Do Objects in the Sky Seem to Change? 285
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ee
Fe
ee
The Nighttime Skypoe a baae eis are
ey,
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moon from Earth | moonclose up
Night alwaysfollows day. On many nights
you can see the moonin the sky. The moon
is a large ball of rock that circles Earth. The
moon seemsto shine, but the moon does not
give off its own light. The moon reflects light
from the sun.
@=z=> Write a fact about the moon.
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MifflinHarcourt
-Image
Credits:
(I)©Jan-Peter
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Images;
(t)©AvalonImaging/Alamy
286
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Ona clear night, you can see manysiars.
Stars are balls of hot gases. These gases give
off light. This light is what you see from Earth.
Stars look tiny because they are far away. A
telescope can help you see them better. It
makes objects look bigger.
q=zza> Underline the sentence that
tells why you can seestars.
gApply What You Know
Work with a group. Make a picture dictionary
about the nighttime sky. List the objects in the
nighttime sky. Draw a picture for each object.
Write sentences totell aboutit. | Lesson 1 @ How Do Objects in the Sky Seem to Change? 237
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| full moon | | third-quarter moon|
The shape of the moon seemsto
change. These changesare called
phases. Phases are the moon's
pattern of light and darkness that
you see as the moon moves. The
phases repeat each month.
Gl=> Draw an X on
the phase of the moonthat lookslike
a whole circle. Draw a box around the
phases that looklike half of a circle.
288
QDPatterns Ly
Go to the online
handbook
for tips.
Describe “=~”
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to the online
handbook
for tips.
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©Houghton
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[These are stars you can see during the winter.|
The sun is the only star you can see
during the day. But the stars you see
each night are not always the same.
They change with the seasons.
Lesson 1 ¢ How Do Objects in the Sky Seem to Change?sso Oo J y g
289
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Which sentences are facts about the
patternsof the stars? Choosealll
correct answers.
@ The sunis the only star you can see
during the day.
(®) The stars at night in the winter are
the same asthe stars at night in
the summer.
©You can see different stars at different
times of the year.
A) Apply What You Know.
Evidence Notebook ¢ Work with a group. Make
a model of the phases of the moon. Use your
modelto tell about the pattern of phases of
the moon. How does the moon seem to change?
Use evidence totell how you know. Record your
answers in your Evidence Notebook.
290
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©Houghton
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ete
Bl SelelgettIveCMA :PTEee
Take It Further
People in Science & Engineering ° | Space Technology : °
Dr. Sarah BallardTy ae
Dr. Sarah Ballard is an astronomer.
An astronomer studies objects in the sky.
Dr. Ballard searches for new planets. A
planet is a large object in space that moves
ground a sun or a star. Earth is a planet.
Lesson 1 @ How Do Objectsin the Sky Seem to Change?291
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292
(8) They find newplanets.
© They study animals.
® They study objects in the sky.
correct answers.
What do astronomers do? Chooseall
©Houghton
MifflinHarcourt
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©Houghton
MifflinHarcourt
-Image
Credits:
Ostockelements/Shutterstock
Seer ae——_
- Seba oaaas : —————
Lesson Check
Can You Explain It?
How do objects in the sky seem to change?
Be sure to
© Tell how objects seem to changein the sky.
e Describe the pattern of changes.
Lesson 1 @ How Do Objects in the Sky Seem to Change? 293
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Spas
Self Check1. What causesthe sun to seem to move
in patterns?
@®) Earth turnsall the way around.
(B) The sun turnsall the way around.
©The moonturnsall the way around.
wordsfrom the box to label each picture.
night late afternoon noon
3. How manytimes does the sun seem to rise
in one week?
@)1
(B)7
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©Houghton
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U4. What is the moon?
@a large star that circles Earth
a large ball of rock that circles Earth
©a large ball of rock that blockslight from
the sun
5.Whatare the phases of the moon? Write the
numbers to show the correct order. Thefirst one
has been donefor you.
6.What are the patterns of objects in the sky?
Chooseall correct answers.
@The sun seems to movein the daytime sky.
All stars appearin the daytimesky.
©The moon seemsto change shape during
the month.
Lesson 1 © How Do Objectsin the Sky Seem to Change? 295