The document discusses Pluto being reclassified from a planet to a dwarf planet. It provides vocabulary words related to astronomy and the solar system. It then presents a reading passage about the discovery of the dwarf planet Eris in 2003, which caused scientists to question Pluto's status as a planet since it is smaller than Eris. As a result of this debate, in 2006 the International Astronomical Union established new definitions for what constitutes a planet, and Pluto no longer met the criteria. It is now classified as a dwarf planet along with Eris and Ceres. The document provides various classroom activities for students to learn more about Pluto's reclassification through reading, speaking, listening, and writing exercises.

1. Unit: Science and Technology
Topic: Solar system
Matthayomsuksa 4

2. video structure
reading activity
listening activity speaking activity
writing activity
vocabulary Pluto is out!

4. vocabulary

5. distant (adj.)
far away in space or time
example: The way from
the Sun to Pluto is distant.

6. astronomer (n.)
an expert in or student of
astronomy
example: My uncle is
an astronomer.

7. argue (v.)
exchange or express
opposite views
example: We argue for
the best reason.

8. discovery (n.)
to process of finding
information, a place or an
object, especially for the
first time, or the things
that is found
example: The first step on
the Moon is the discovery
of mankind.

9. icy (adj.)
covered with or consisting
of ice
example: Pluto was
covered by icy landscape.

10. classified (adj.)
arranged in classes or
categories
example: They have
classified that Pluto is not
a planet.

11. orbit (n.)
the curved path through
which objects in space
move around a planet
example: The orbit of
Pluto is strange.

12. dwarf (n.)
which is much smaller
than the usual size for its
type or species
example: Pluto is a dwarf
planet.

13. asteroid (adj.)
one of many large rocks
that circle the sun
example: There are
asteroid objects between
Mars and Jupiter.

14. structure

15. Coordinating Conjunctions
Coordinating Conjunctions connect words,
phrases, or groups of words in a sentence. The words or
phrases being connected should be equal or similar.
Coordinating Conjunction always go between the
words or phrases that they are connecting.
There are seven coordinating conjunction in the
English language. An easy way to remember the
coordinating conjunction is to remember FANBOYS

16. FANBOYS
F
A
N
B
O
Y
S
FOR
AND
NOR
BUT
OR
YET
SO
reason
addition
and not
contrast
options
outcome
result

17. Pattern1 – Connecting two main clauses
Rules for using a
Coordinating Conjunction
Main Clause Coordinating Conjunction, Main Clause
When you connect two main clauses with a
coordinating conjunction, use a comma.
Examples:
- Tom walked the dog, and he grabbed the mail.
- Earth orbits around itself, and it orbits around the Sun.

18. Pattern2 – Connecting two items
Item Coordinating Conjunction- Item
You can also use a coordinating conjunction to
connect any two items. These items can be any
grammatical unit except main clauses, do not use comma.
Examples:
- She likes apples and bananas.
- My grandfather is old but he is strong.

19. Pattern3 – Connecting three or more items in a series
Item Coordinating Conjunction,
When you have three or more items in a series,
you generally use a comma before the coordinating
conjunction. Some handbooks and style guides will tell
you that this comma is optional, but my advice is to put it
in.
Examples:
with Comma
- She is cooking chicken, potatoes, corn, and carrot.
without Comma
- She is cooking chicken, potatoes, corn and carrot.
Item Item,

20. Text 3
Pluto is out!

22. What does the text
talk about?
What planet was departed
from solar system?

23. Listening
Activity

24. Listening Activity
Directions:
- Make a group of three.
- Listen to the definition of vocabulary.
- Write the words of vocabulary on the paper and
stick it on the board.
- When you finish, show the board up and say
“Hey!” together.

26. asteroid

27. icy

28. orbit

29. astronomer

30. distant

31. dwarf

32. Reading
Activity

33. Reading Activity
Directions:
- Work in pair.
- Read the text “Pluto is out!”.
- Read the sentence on the power point and
think of it TRUE or FALSE.

34. Number 1
Number 2
Number 3
Number 4
Number 5
Number 6
Number 7
Number 8
Number 9
Number 10
Number 11

35. 1.Former name of Eris
is 2003 UB313.
TRUE FALSE

36. 2.Pluto, Eris, and Ceres
are dwarf planets.
TRUE FALSE

37. 3.Pluto is large and round.
TRUE FALSE

38. 4.We have eight planets
since August 30, 2004.
TRUE FALSE

39. 5.Eris is between
Mars and Jupiter.
TRUE FALSE

40. 6.Astronomers agree that
Pluto is planet.
TRUE FALSE

41. 7.Pluto is dwarf planet
but Eris is planet.
TRUE FALSE

42. 8.Planet must circle
around the Sun.
TRUE FALSE

43. 9.The discovery of 2003 UB313 made
scientists question about Pluto.
TRUE FALSE

44. 10. Pluto’s orbit is strange and is
shared with other objects.
TRUE FALSE

45. 11.To classify an object as a planet,
an object must meet four criteria.
TRUE FALSE

46. CORRECT

48. Speaking
Activity

49. Speaking Activity
Directions:
- Get in pair.
- Flip a coin.
(heads = move 1 square; tails = move two squares)
- Answer the questions.
- The first person to get to Finish! is the winner.

50. START
1
2
3
4
5
6
7
8
9
FINISH

51. Writing
Activity

52. Writing Activity
Directions:
- Make a group of three.
- Summarize about the text “Pluto is out!” and
write your opinion on the paper.
- Present your work in front of class.

53. Photo is out!
Nowadays, our solar system has eight planets,
not nine. Because of the world’s astronomer decided
that Pluto was no longer a planet. ……………………………
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54. Members
1. Miss Jirapat Chomvilai 54010513010
2. Miss Thunyachon Ladawan 54010513020
3. Mr. Narunon Prathammasarn 54010513047
4EN, English Major
Faculty of Education, Mahasarakham University