What is called space?
- aEarth's atmosphere
- bThe limitless sky
- cThe solar system only
- dThe boundary of a galaxy
206 questions · 38 sections
What is called space?
Which of the following has light of its own?
Which of the following is a satellite?
Which of the following is NOT considered an extra-terrestrial body?
According to many scientists, the universe has-
What is a star?
Stars are mainly composed of which two gases?
At what temperature do the gases in a star burn?
The distance between Earth and stars is measured in-
What is one light year?
The speed of light is approximately-
How long does light take to reach the Earth from the Sun?
Which is the closest star to the Sun?
What is the distance of Proxima Centauri from the Earth?
Why are other stars not visible during the day?
A group of stars seen at night is called-
Who first named constellations based on their appearance?
Which of the following is a constellation?
Which constellation is named after a hunter?
Which of the following together make a galaxy?
How many galaxies are there in space?
Most galaxies have which shape?
Which galaxy do we live in?
According to the textbook, parabolic galaxies are-
Nebulae are located in-
A nebula may contain-
Approximately how many nebulae are there in the solar system?
What we call a 'shooting star' is actually a-
At what speed do meteors approach the Earth?
Why do meteors appear like 'running stars'?
Which celestial body has a head and a tail?
When does a comet's tail become longest?
Halley's Comet appears once in how many years?
Who discovered Halley's Comet?
Why do planets shine at night?
The orbits of planets are in the shape of-
How many planets are there in the solar system?
Which of the following is NOT a planet?
What is a satellite?
The Moon is which type of satellite of the Earth?
Man-made satellites are NOT used for-
Which body lies at the centre of the solar system?
The Sun is what colour?
What is the approximate diameter of the Sun?
The original source of heat and light for the Earth is-
Which is the largest planet in the solar system?
Which planets cannot be seen from Earth without a telescope?
The thousands of minor planets in the solar system are called-
Which force keeps planets, asteroids and comets in their orbits?
Which is the smallest and nearest planet to the Sun?
What is the average distance of Mercury from the Sun?
What is the diameter of Mercury?
How long is one year on Mercury?
Why is there no existence of life on Mercury?
Which American spacecraft sent photos of Mercury's surface in 1974?
How many satellites does Mercury have?
Which planet is known as the morning star or the evening star?
Which is the brightest and hottest planet of the solar system?
The cloudy atmosphere of Venus mainly consists of-
The distance between Venus and the Sun is-
What is the diameter of Venus?
How long is one year on Venus?
In which direction does Venus move on its own axis?
What kind of rain occurs on Venus?
Earth is the ___ nearest planet from the Sun.
The average distance of the Earth from the Sun is-
According to the textbook, the diameter of Earth is nearly-
The exact time taken by the Earth to orbit the Sun is-
Why does life exist on Earth?
How many natural satellites does the Earth have?
Which planet is the nearest neighbour of the Earth?
What is the average distance of Mars from the Sun?
The diameter of Mars is-
How long does Mars take to orbit the Sun?
The two satellites of Mars are-
Why is there no life on Mars?
What is the diameter of Jupiter?
Jupiter is how many times larger than the Earth?
Jupiter's distance from the Sun is-
The atmosphere of Jupiter is made up of-
How long does Jupiter take to orbit the Sun?
How many satellites does Jupiter have?
Which is the second largest planet in the solar system?
The distance of Saturn from the Sun is-
The diameter of Saturn is-
The atmosphere of Saturn contains-
Saturn takes how long to orbit the Sun once?
Saturn is famous for having the brightest-
The number of satellites of Saturn is-
Which is the third largest planet in the solar system?
The distance of Uranus from the Sun is-
How many years does Uranus take to orbit the Sun?
The diameter of Uranus is-
Which gas is very high in the atmosphere of Uranus?
The number of satellites of Uranus is-
Neptune's distance from the Sun is about-
The diameter of Neptune is-
Neptune circumnavigates the Sun once in-
The area of Neptune is as large as how many Earths?
The atmosphere of Neptune is made up of-
The number of satellites of Neptune is-
Which astronaut first proved that the Earth is round by orbiting it?
On which date did Uri Gagarin move around the Earth?
The real shape of the Earth is-
According to the textbook, the north-south polar diameter of the Earth is-
For the convenience of measurement, the Earth's diameter is taken as-
The average radius of the Earth is-
The Earth's equatorial measurement (per textbook) is rounded to-
What is latitude?
How many parallels of latitude are there?
The value of the Equator is-
The Equator divides the Earth into-
What is the latitude of the North Pole?
The latitude of the Tropic of Cancer is-
The latitude of the Tropic of Capricorn is-
The Arctic Circle is at what latitude?
Which latitude is known as the Great Circle?
Angles are divided into-
Which instrument is used to measure the altitude of the noon sun?
The formula for finding latitude using a sextant is-
If the altitude of the noon sun is 50° and the sun's declination is 12° (south), the latitude is-
The altitude of the pole star at the equator is-
The altitude of the pole star at the North Pole is-
The Prime Meridian passes through-
The longitude of Greenwich is-
The total number of longitudes is-
Longitudes are how long compared to latitudes?
The time difference for every 1° of longitude is-
Every 15° east or west of Greenwich, the time changes by-
The standard time of Bangladesh is based on which longitude?
When it is 12 noon in Bangladesh, what is the time in London?
East of Greenwich, the time is-
If the local time at a place is 12 noon, the local time at a place 10° east will be-
180° east longitude and 180° west longitude are-
Which line passes through the central part of Bangladesh?
In the middle region of the Tropic of Cancer and the Tropic of Capricorn, sunshine falls-
The Equator is also known as-
In which year was the International Date Line established?
The International Date Line corresponds to which longitude?
The International Date Line mostly runs over which ocean?
The International Date Line is curved how many degrees east in Aleutian, Fiji and Chatham islands?
The International Date Line is curved how many degrees east in the Bering Strait?
The total date difference between travelling 180° east and 180° west along the longitude is-
According to the textbook, when ships or planes cross the International Date Line travelling eastward, they-
What is an antipode?
The sum of longitudes of two antipodal places is-
The time difference between a place and its antipode is-
The Earth completes one rotation on its own axis in-
The axis of the Earth is inclined at what angle to the perpendicular of its plane of orbit?
In which direction does the Earth rotate on its own axis?
The movement of the Earth on its own axis in a day is called-
The most modern and correct proof of Earth's rotation is-
Which scientist explained that the flattened poles and bulging middle of the Earth are due to its rotation?
According to Ferrel's law, sea waves and air turn to which side in the Northern Hemisphere?
According to Ferrel's law, sea waves and air turn to which side in the Southern Hemisphere?
Near the Equator, places spin at more than-
Consider the following reasons why we do not feel the motion of the Earth:
The difference between high tide times on two consecutive days is about-
Which of the following is NOT a direct result of Earth's rotation?
One twenty-fourth of a full rotation is taken as-
The movement of the Earth around the Sun is called-
The path along which the Earth travels around the Sun is called-
The time taken to complete one revolution is called a-
The exact length of a solar year is-
Approximately how many extra hours remain each year compared to the 365-day calendar?
To balance the extra hours, an extra day is added every-
In a leap year, the month of February has-
A leap year has how many days in total?
On which date does the sun shine vertically on the Equator in spring?
On 21st June, the sun shines vertically on-
On 22nd December, the sun shines vertically on-
The 21st March is called-
The 23rd September is called-
On the longest day in the Northern Hemisphere, the sun's rays fall vertically on-
In the North Pole, the longest day and shortest night occurs on-
The displacement, disappearance and reappearance of stars in the night sky proves Earth's-
The Sun is approximately how many times bigger than the Earth?
Consider the following proofs of Earth's revolution:
How many seasons does the entire year have, according to the textbook?
The four seasons mentioned in the textbook are-
When it is summer in the North Pole, it is which season in the South Pole?
In which month is extreme heat felt in Bangladesh?
The orbital path of the Earth is-
At what angle does the Earth's polar region lean during revolution?
Consider the following causes of seasonality:
In the North Pole, summer begins how much before 21st June?
From 21st June, the sun starts moving back towards-
On 23rd September, the amount of heat and cold in the weather is-
When winter occurs in the North Pole, the season in the South Pole is-
Which of the following is NOT an impact of changing season?
Many natural disasters are related with-
On which planet is a year 88 days long?
Due to the diurnal motion-
Among latitudes and longitudes shown on a globe, which vertical line is marked with 0°?
Latitude and longitude lines are important because they help:
Which of the following is a constellation mentioned in the textbook?
Which planet has a diameter of 6,787 km and orbits the Sun in 687 days?
Which planet has a diameter of 1,42,984 km and orbits the Sun in 4,331 days?
If the sun's elevation at noon in the northern hemisphere is 40° (with the sun's declination zero), what is the latitude of that location?
How do day and night occur on Earth?
The galaxy in which we live is called-
Why is the Earth's rotation speed fastest at the Equator?
Sharmin saw a 'shining star' in the early morning sky that her textbook said was actually a planet. That planet is-
On 1st June, Roopam observes Norway (66.5° N) and Canberra (35° S) experience different seasons simultaneously. On that day, in Norway the day will be-