Which of the following statements related to the stages of evolution of the present atmosphere are correct? 1. The first stage is marked by the loss of primordial atmosphere 2. In the second stage, the hot interior of the earth contributed to the evolution of the atmosphere 3. Finally, the composition of the atmosphere was modified by the living world through the process of photosynthesis Select the answer using the code given below:
1, 2 and 3
The present atmosphere evolved in stages: the primordial atmosphere (mainly hydrogen and helium) was lost due to the sun's heat and solar winds, after which volcanic outgassing from the hot interior of the early Earth released gases such as water vapour and carbon dioxide to form a secondary atmosphere. Later, photosynthetic life released oxygen and modified the atmosphere's composition into its present form, so all three statements are correct.
Which one of the following is the correct sequence of the given planets in increasing order of their size (diameter)?
Which of the following statements is/are correct?
1. The earth is nearest to the Sun at Perihelion, which generally occurs on January 3.
2. The earth is farthest away from the Sun at Perihelion, which generally occurs on July 4.
3. The earth is farthest away from the Sun at Aphelion, which generally occurs on July 4.
4. The earth is nearest to the Sun at Aphelion, which generally occurs on January 3.
Select the correct answer using the code given below:Which one of the following statements is not correct?
Which one of the following cities is the closest to Equator ?
Consider the following statements about some planets in the solar system:
1. Mercury has no atmosphere.
2. Venus has two moons.
3. There is no land on Jupiter.
4. Rings of Saturn are composed of lumps of ice and dust.
Which of the statements given above are correct?
If it is 10:00 a.m. at Greenwich Mean Time (GMT), then what will be the time at 90° E longitude?
Which of the following groups of planets is termed as ‘gas planets’ as they are composed primarily of lighter ices, liquids and gases?
Which of the following statements is/are correct?
1. In June 2016, the LIGO group of scientists announced the detection of a second set of gravitational waves.
2. Gravitational waves were generated due to merger of two black holes at about 1.4 billion light-years distant.
3. Gravitational waves were inserted due to collision of two white dwarf stars at about 14 billion light-years distant.
Select the correct answer using the code given below:The four planets closest to the Sun are called
Which one of the following countries is NOT located on the Tropic of Capricorn?
A huge collection of gas, dust and billions of stars is called a:
The Greenwich Mean Time is the local time at :
The force exerted by rotation of the earth is known as:
How many hours is one solar day
Moon changes its shape everyday due to: