Prev 1 2 3 4 5 Next
1. The atmosphere is divided into ____ layers based on composition, temperature etc.
A. Two
B. Three
C. Five
D. Ten
ANSWER: C.Five
SOLUTION :The column of the atmosphere is divided into five different layers depending upon the temperature condition. They are troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
2. The ozone layer is present in _____.
A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere
ANSWER: B.Stratosphere
SOLUTION:The ozone layer is the common term for the high concentration of ozone that is found in the stratosphere around 15–30km above the earth’s surface. It covers the entire planet and protects life on earth by absorbing harmful ultraviolet-B (UV-B) radiation from the sun.
3. The atmosphere is held around the Earth due to the Earth’s _____.
A. Magnetic field
B. Gravity
C. Temperature
D. Pressure
ANSWER : B.Gravity
SOLUTION:The atmosphere is held to the Earth due to gravitational force of Earth. The gases in the atmosphere have a mass and hence Earth attracts them, as a result of which the gases do not escape from Earth.
4. The lowermost layer of earth’s atmosphere?
A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere
ANSWER: A.Troposphere
SOLUTION:Troposphere. The troposphere is the lowest layer of our atmosphere. Starting at ground level, it extends upward to about 10 km (6.2 miles or about 33,000 feet) above sea level. We humans live in the troposphere, and nearly all weather occurs in this lowest layer.
5. _____ lies above the troposphere.
A. Thermosphere
B. Mesosphere
C. Stratosphere
D. Lonosphere
ANSWER: C.Stratosphere
SOLUTION:The stratosphere is the layer of Earth’s atmosphere that lies above the troposphere.
6. _____ lies above the stratosphere.
A. Ionosphere
B. Thermosphere
C. Exosphere
D. Mesosphere
ANSWER: D.Mesosphere
SOLUTION: The mesosphere is the layer of Earth’s atmosphere that lies above the stratosphere. The mesosphere extends to a height of about 85 kilometers (53 miles) above the planet.
7. This is the uppermost layer of the atmosphere _____.
A. Mesosphere
B. Ionosphere
C. Endosphere
D. Exosphere
ANSWER: D.Exosphere
SOLUTION: Exosphere is the uppermost layer of the atmosphere. This layer gradually merges with interplanetary space.
8. Thermosphere is also called _____.
A. Endosphere
B. Ionosphere
C. Mesosphere
D. Lithosphere
ANSWER: B.Ionosphere
SOLUTION: The lower part of the Thermosphere, a layer of ionised air extending from the Mesopause to approximately 600km is also known as the Ionosphere, while the upper part of the Thermosphere is also known as the Exosphere.
9. The scientific study of atmosphere is called ____.
A. Meteorology
B. Metro-logy
C. Polimpsest
D. None of these
ANSWER: A.Meteorology
SOLUTION: Meteorology is the science dealing with the atmosphere and its phenomena, including both weather and climate.
10. Which layer has the lowest temperature in the atmosphere?
A. Stratosphere
B. Exosphere
C. Thermosphere
D. Mesosphere
ANSWER: D.Mesosphere
SOLUTION:The top of the mesosphere is the coldest area of the Earth’s atmosphere because temperature may locally decrease to as low as 100 K (-173°C).