Phases of Moon
When we observe the sky daily for some days, we find that the moon changes its shape every day. It is called phases of the moon. This note provides us the information about different phases of moon.
Summary
When we observe the sky daily for some days, we find that the moon changes its shape every day. It is called phases of the moon. This note provides us the information about different phases of moon.
Things to Remember
- When we observe the sky daily for some days, we find that the moon changes its shape every day. It is called phases of the moon.
- When the moon forms an angle of 0 ͦ from the plane of earth’s orbit, the whole dark part of the moon faces towards the earth and hence any part of the moon is not seen i.e. is a new moon(m1).
- When moon forms an angle of 180 ͦ from the plane , the moon is seen completely round, which is called full moon.
MCQs
No MCQs found.
Subjective Questions
Q1:
A. Write the words, from the above text, which are similar in meaning to the following:
(a) rich
Type: Very_short Difficulty: Easy
Q2:
A. Write the words, from the above text, which are similar in meaning to the following:
(b) clear
Type: Very_short Difficulty: Easy
Q3:
A. Write the words, from the above text, which are similar in meaning to the following:
(c) linked
Type: Very_short Difficulty: Easy
Q4:
A. Write the words, from the above text, which are similar in meaning to the following:
(d) condition
Type: Very_short Difficulty: Easy
Q5:
A. Write the words, from the above text, which are similar in meaning to the following:
(e) exactly
Type: Very_short Difficulty: Easy
Q6:
A. Write the words, from the above text, which are similar in meaning to the following:
(f) likeable
Type: Very_short Difficulty: Easy
Q7:
A. Write the words, from the above text, which are similar in meaning to the following:
(g) interest
Type: Very_short Difficulty: Easy
Q8:
A. Write the words, from the above text, which are similar meaning to the following words:
(h) knowing or realizing
Type: Very_short Difficulty: Easy
Q9:
A. Write the words, from the above text, which are similar meaning to the following words:
(i) link
Type: Very_short Difficulty: Easy
Q10:
A. Write the words, from the above text, which are similar meaning to the following words:
(j) annoying or irritating
Type: Very_short Difficulty: Easy
Q11:
A. Write the words, from the above text, which are similar meaning to the following words:
(k) cause
Type: Very_short Difficulty: Easy
Q12:
A. Write the words, from the above text, which are similar meaning to the following words:
(l) envious
Type: Very_short Difficulty: Easy
Q13:
B. Write "T" for true and "F" for false statement:
(a) Suresh's parents lived together with him.
Type: Very_short Difficulty: Easy
Q14:
B. Write "T" for true and "F" for false statement:
(b) Suresh live with his mother and young brother.
Type: Very_short Difficulty: Easy
Q15:
B. Write "T" for true and "F" for false statement:
(c) He made his mother angry.
Type: Very_short Difficulty: Easy
Q16:
B. Write "T" for true and "F" for false statement:
(d) His teacher and his mother could give him more attention as Suresh wanted.
Type: Very_short Difficulty: Easy
Q17:
B. Write "T" for true and "F" for false statement:
(e) Suresh mother was dead.
Type: Very_short Difficulty: Easy
Q18:
B. Write "T" for true and "F" for false statement:
(f) The circumstances at home were not favorable for Suresh.
Type: Very_short Difficulty: Easy
Q19:
B. Write "T" for true and "F" for false statement:
(g) His mother favored her younger son knowingly.
Type: Very_short Difficulty: Easy
Q20:
C. Answer the following questions:
(a) Why did he quarrel with his younger brother?
Type: Short Difficulty: Easy
Q21:
C. Answer the following questions:
(b) What were the reason for his bad behavior?
Type: Short Difficulty: Easy
Q22:
C. Answer the following questions:
(c) What did Suresh do at school and at home?
Type: Short Difficulty: Easy
Q23:
C. Answer the following questions:
(d) Whom did Suresh live with?
Type: Short Difficulty: Easy
Q24:
C. Answer the following questions:
(e) What did Suresh do at school once?
Type: Short Difficulty: Easy
Q25:
A. Find the words in the text which are opposite in meaning to the following:
(a) poor
Type: Very_short Difficulty: Easy
Q26:
A. Find the words in the text which are opposite in meaning to the following:
(b) oppose
Type: Very_short Difficulty: Easy
Q27:
A. Find the words in the text which are opposite in meaning to the following:
(c) defence
Type: Short Difficulty: Easy
Q28:
A. Find the words in the text which are opposite in meaning to the following:
(d) boring
Type: Short Difficulty: Easy
Q29:
C. Write "T" for true and "F" for false statements:
(a) Suresh had a stepmother.
Type: Very_short Difficulty: Easy
Q30:
C. Write "T" for true and "F" for false statements:
(b) There are three member in his separate family.
Type: Very_short Difficulty: Easy
Q31:
C. Write "T" for true and "F" for false statements:
(c) Suresh's brother was more irritating at school.
Type: Very_short Difficulty: Easy
Q32:
C. Write "T" for true and "F" for false statements:
(d) Suresh was really wanted and unloved at home.
Type: Very_short Difficulty: Easy
Q33:
C. Answer the following questions:
(a) What was the cause of Suresh's badness?
Type: Short Difficulty: Easy
Q34:
C. Answer the following question:
(b) What naughty activities did Suresh do?
Type: Short Difficulty: Easy
Q35:
C. Answer the following question:
(c) How was Suresh's brother?
Type: Short Difficulty: Easy
Q36:
C. Answer the following question:
(d) What did Suresh do at school and at home?
Type: Short Difficulty: Easy
Q37:
C. Answer the following question:
Why did he attack on others ?
Type: Short Difficulty: Easy
Q38:
A. Find the words, from the passage, which have opposite meaning to the words given below:
i. poor
Type: Very_short Difficulty: Easy
Q39:
A. Find the words, from the passage, which have opposite meaning to the words given below:
ii. together
Type: Very_short Difficulty: Easy
Q40:
A. Find the words, from the passage, which have opposite meaning to the words given below:
iii. defend
Type: Very_short Difficulty: Easy
Q41:
A. Find the words, from the passage, which have opposite meaning to the words given below:
iv. destroy
Type: Very_short Difficulty: Easy
Q42:
A. Find the words, from the passage, which have opposite meaning to the words given below:
v. badly behaved
Type: Short Difficulty: Easy
Q43:
A. Find the words, from the passage, which have opposite meaning to the words given below:
vi. confusing
Type: Very_short Difficulty: Easy
Q44:
A. Find the words, from the passage, which have opposite meaning to the words given below:
vii. older
Type: Very_short Difficulty: Easy
Q45:
A. Find the words, from the passage, which have opposite meaning to the words given below:
viii. rebuke
Type: Very_short Difficulty: Easy
Q46:
A. Find the words, from the passage, which have opposite meaning to the words given below:
ix. looking for
Type: Short Difficulty: Easy
Q47:
Match the words in column A with their meaning in column B:
Column 'A' Column 'B'
Frequent that you do not want
hurt not loved by anyone
favour made sure or certain of
unwanted upset and offended by sth that sb has said or done
successful happening or doing something
unloved having become popular or achieving aims
ensure treat better
Type: Very_short Difficulty: Easy
Q48:
Find the words from the text which are closest to the following definitions:
causing trouble or pains etc. over a long period
Type: Very_short Difficulty: Easy
Q49:
Find the words from the text which are closest to the following definitions:
cut or damaged skin slightly with something sharp
Type: Very_short Difficulty: Easy
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Phases of Moon
When we observe the sky daily for some days, we find that the moon changes its shape every day. It is called phases of the moon.
Phases of the moon occur because of following reasons:
- The moon is a non-luminous body and reflects the sunlight.
- The moon is revolving around the earth in its elliptical orbit.
When the moon forms an angle of 00 from the plane of earth’s orbit, the whole dark part of the moon faces towards the earth and hence any part of the moon is not seen i.e. is a new moon(m1). After 24 hours, when the moon forms an angle 120 from the plane of its orbit, a little bright part of the moon faces towards the earth and a minimum part of the moon is seen bright. It is called waxing crescent (m2). When the moon forms an angle of 900, the bright part of the moon is seen in the form of the hemisphere which is called a first quarter (m3). When the moon forms an angle of 1680, very little part of the moon remains in the dark which is called waxing gibbous (m4). When the moon forms an angle of 1800 from the plane , the moon is seen completely round, which is called full moon. When the moon forms an angle of 192o from the plane very little part is covered by the darkness and it is called waning gibbous (m6). When the moon forms an angle of 2700, the moon is seen in the form of hemisphere again, which is called last quarter (m7). When the moon forms an angle of 3840, very little part of the moon is seen in the sky and it is called wanning crescent (m8) . After completing an angle of 3600 by the moon in its orbit again new moon occurs.
Some interesting facts about the moon:
- The moon rises about 50 minutes late daily.
- The time of sunrise and moonrise is same on the new moon.
- On the full moon, the moon rises, at the time of the sunset.
- Moon rises at the mid-day on the first quarter.
- The moon rises at the midnight on the last quarter.
- The moon rises about 50 minutes after the sunrise on the waxing crescent.
- The moon rises about 50 minutes before the sunset on the waxing gibbous.
Lesson
The Earth in the Universe
Subject
Science
Grade
Grade 9
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