Practicing Class 8 Science MCQ and Class 8 Science Chapter 11 Keeping Time with the Skies MCQ Questions Online Test with Answers daily helps in time management.
Class 8 Keeping Time with the Skies MCQ with Answers
MCQ on Keeping Time with the Skies Class 8
Class 8 Science Chapter 11 Keeping Time with the Skies MCQ Questions with Answers
Question 1.
What causes the Moon to shine?
(a) It emits its own light
(b) It reflects sunlight
(c) It glows due to heat
(d) It reflects Earth’s light
Answer:
(b) It reflects sunlight
Question 2.
The day when the Moon is not visible at all is called:
(a) Full Moon
(b) New Moon
(c) Half Moon
(d) Gibbous Moon
Answer:
(b) New Moon
Question 3.
The period when the illuminated part of the Moon increases is called:
(a) Waning
(b) Eclipse
(c) Waxing
(d) Shading
Answer:
(c) Waxing
Question 4.
The Moon completes one cycle of phases in about:
(a) 7 days
(b) 15 days
(c) 29.5 days
(d) 60 days
Answer:
(b) 15 days
Question 5.
Lunar calendars are primarily based on:
(a) Earth’s rotation
(b) Moon’s phases
(c) Sun’s position
(d) Stars’ position
Answer:
(b) Moon’s phases
Question 6.
A lunar year consists of about:
(a) 300 days
(b) 365 days
(c) 354 days
(d) 400 days
Answer:
(c) 354 days
Question 7.
The Gregorian calendar is aligned with:
(a) Lunar months
(b) Solar year
(c) Sidereal month
(d) Moon’s orbit
Answer:
(b) Solar year
Question 8.
In a leap year, February has:
(a) 28 days
(b) 27 days
(c) 29 days
(d) 30 days
Answer:
(c) 29 days
Question 9.
What is added to lunar calendars every few years to match the solar year?
(a) A leap day
(b) A leap month
(c) An extra week
(d) An extra hour
Answer:
(b) A leap month
Question 10.
The Indian National Calendar starts on:
(a) 1 January
(b) 15 August
(c) 22 March
(d) 21 December
Answer:
(c) 22 March
Question 11.
Which of these is an ISRO satellite to study the Sun?
(a) Mangalyaan
(b) Chandrayaan
(c) Aditya L1
(d) Cartosat
Answer:
(c) Aditya L1
Question 12.
Which festival is celebrated on a new Moon?
(a) Holi
(b) Diwali
(c) Buddha Purnima
(d) Dussehra
Answer:
(b) Diwali
Keeping Time with the Skies Class 8 Assertion-Reason Type Questions
Use the following key to choose the appropriate answer.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Question 1.
Assertion (A): The Moon changes shape daily.
Reason (R): We see different parts of the illuminated portion of the Moon as it moves around the Earth.
Answer:
(a) Both A and R are true and R is the correct explanation of A
Question 2.
Assertion (A): The Gregorian calendar is a lunar calendar.
Reason (R): Solar calendars are created to synchronise the year with the seasons.
Answer:
(d) A is false but R is true
Question 3.
Assertion (A): Lunar year is shorter than solar year.
Reason (R): Lunar year has 12 months of 29.5 days each.
Answer:
(a) Both A and R are true and R is the correct explanation of A
Question 4.
Assertion (A): Diwali always falls on the same Gregorian date.
Reason (R): It is based on a luni-solar calendar.
Answer:
(d) A is false but R is true
Question 5.
Assertion (A): The Indian National Calendar was introduced in 1850.
Reason (R): The Calendar Reform Committee recommended a unified calendar for the whole of India.
Answer:
(d) A is false but R is true
Keeping Time with the Skies Class 8 Fill in the blanks
Question 3.
The difference between a lunar and solar year is about ……….. days.
Answer:
11
Question 2.
Festivals like Makar Sankranti follow the……….. calendar.
Answer:
solar sidereal
Question 3.
……….. calendars are based on both lunar months and solar years.
Answer:
Luni-solar
Question 4.
……….. is a student-built satellite launched by ISRO.
Answer:
AzaadiSat
Question 5.
The Gregorian calendar is based on the ……….. year.
Answer:
tropical
Keeping Time with the Skies Class 8 True or False
Question 1.
During the waning phase, the bright part of the Moon grows larger.
Answer:
False
Question 2.
The Moon’s phases happen because we see different portions of its illuminated half.
Answer:
True
Question 3.
In the Gregorian calendar, all months have the same number of days.
Answer:
False
Question 4.
Lunar eclipses occur only on a new Moon day.
Answer:
False
Question 5.
The Moon rises and sets at exactly the same time as the Sun.
Answer:
False
Keeping Time with the Skies Class 8 Match the following
Question 1.
| Column A | Column B |
| (i) New Moon | (a) More than half illuminated |
| (ii) Full Moon | (b) No illuminated part is visible |
| (iii) Crescent Moon | (c) Entire part is illuminated and visible |
| (iv) Gibbous Moon | (d) Less than half illuminated |
| (v) Half Moon | (e) Exactly half illuminated |
Answer:
| Column A | Column B |
| (i) New Moon | (b) No illuminated part is visible |
| (ii) Full Moon | (c) Entire part is illuminated and visible |
| (iii) Crescent Moon | (d) Less than half illuminated |
| (iv) Gibbous Moon | (a) More than half illuminated |
| (v) Half Moon | (e) Exactly half illuminated |