What is the scientific field dedicated to the study of heavenly bodies, celestial objects, and phenomena originating beyond Earth's atmosphere? [#2487]
Q1. What is the scientific field dedicated to the study of heavenly bodies, celestial objects, and phenomena originating beyond Earth's atmosphere? Q1. What is the scientific field dedicated to the study of heavenly bodies, celestial objects, and phenomena originating beyond Earth's atmosphere?
(A) Astrophysics (A) Astrophysics
(B) Astronautics (B) Astronautics
(C) Astrology (C) Astrology
(D) Astronomy (D) Astronomy
Answer: (D) Astronomy Answer: (D) Astronomy
Astronomy is a natural science that involves the scientific study of celestial objects (such as stars, planets, comets, galaxies, and nebulae), the universe as a whole, and the phenomena that originate beyond Earth's atmosphere. It uses principles of mathematics, physics, and chemistry to understand their origin, evolution, physical and chemical properties, and behavior. While cosmology is a branch of astronomy that focuses on the universe's origin, evolution, and large-scale structure, astronomy encompasses the broader study of all extraterrestrial objects and phenomena.Astronomy is a natural science that involves the scientific study of celestial objects (such as stars, planets, comets, galaxies, and nebulae), the universe as a whole, and the phenomena that originate beyond Earth's atmosphere. It uses principles of mathematics, physics, and chemistry to understand their origin, evolution, physical and chemical properties, and behavior. While cosmology is a branch of astronomy that focuses on the universe's origin, evolution, and large-scale structure, astronomy encompasses the broader study of all extraterrestrial objects and phenomena.
Q1. Why the sky appears blue? Q1. Why the sky appears blue?
(A) Reflection of light (A) Reflection of light
(B) Refraction of light (B) Refraction of light
(C) Dispersion of light (C) Dispersion of light
(D) Diffraction of light (D) Diffraction of light
Answer: (C) Dispersion of light Answer: (C) Dispersion of light
Blue colour of the sky is due to dispersion or scattering of light. The two most common types of matter present in the atmosphere are gaseous nitrogen and oxygen. These particles are most effective in scattering the higher frequency and shorter wavelength portions of the visible light spectrum.Blue colour of the sky is due to dispersion or scattering of light. The two most common types of matter present in the atmosphere are gaseous nitrogen and oxygen. These particles are most effective in scattering the higher frequency and shorter wavelength portions of the visible light spectrum.
Q2. Which of the following planets has a revolution time which is shorter than its rotation time? Q2. Which of the following planets has a revolution time which is shorter than its rotation time?
Q4. What is the distance between the Sun and the Earth? Q4. What is the distance between the Sun and the Earth?
(A) 93,000,000 KM (A) 93,000,000 KM
(B) 149,597,870 KM (B) 149,597,870 KM
(C) 93,500,000 KM (C) 93,500,000 KM
(D) 149,587,870 KM (D) 149,587,870 KM
Answer: (B) 149,597,870 KM Answer: (B) 149,597,870 KM
149,597,870 KM.
The Earth is at 147,100,000 km at perihelion and 152,000,000 km at aphelion.
The Astronomical Unit or AU is based on the average distance of the Earth from the Sun. The AU became a international standard in 2012 and is defined to be exactly 49,597,870.7 km.149,597,870 KM.
The Earth is at 147,100,000 km at perihelion and 152,000,000 km at aphelion.
The Astronomical Unit or AU is based on the average distance of the Earth from the Sun. The AU became a international standard in 2012 and is defined to be exactly 49,597,870.7 km.
Q5. Which of the following planets in our solar system is known for being the hottest? Q5. Which of the following planets in our solar system is known for being the hottest?
(A) Mercury (A) Mercury
(B) Venus (B) Venus
(C) Mars (C) Mars
(D) Jupiter (D) Jupiter
Answer: (B) Venus Answer: (B) Venus
Venus is the hottest planet in our solar system, with surface temperatures reaching as high as 462°C (863°F).Venus is the hottest planet in our solar system, with surface temperatures reaching as high as 462°C (863°F).
Q8. Which is responsible for Earth's magnetic field? Q8. Which is responsible for Earth's magnetic field?
(A) Inner Core (A) Inner Core
(B) Outer Core (B) Outer Core
(C) Mantle (C) Mantle
(D) Crust (D) Crust
Answer: (B) Outer Core Answer: (B) Outer Core
Outer Core
The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in Earth's outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo.Outer Core
The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in Earth's outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo.
Q9. What is the scientific field dedicated to the study of heavenly bodies, celestial objects, and phenomena originating beyond Earth's atmosphere? Q9. What is the scientific field dedicated to the study of heavenly bodies, celestial objects, and phenomena originating beyond Earth's atmosphere?
(A) Astrophysics (A) Astrophysics
(B) Astronautics (B) Astronautics
(C) Astrology (C) Astrology
(D) Astronomy (D) Astronomy
Answer: (D) Astronomy Answer: (D) Astronomy
Astronomy is a natural science that involves the scientific study of celestial objects (such as stars, planets, comets, galaxies, and nebulae), the universe as a whole, and the phenomena that originate beyond Earth's atmosphere. It uses principles of mathematics, physics, and chemistry to understand their origin, evolution, physical and chemical properties, and behavior. While cosmology is a branch of astronomy that focuses on the universe's origin, evolution, and large-scale structure, astronomy encompasses the broader study of all extraterrestrial objects and phenomena.Astronomy is a natural science that involves the scientific study of celestial objects (such as stars, planets, comets, galaxies, and nebulae), the universe as a whole, and the phenomena that originate beyond Earth's atmosphere. It uses principles of mathematics, physics, and chemistry to understand their origin, evolution, physical and chemical properties, and behavior. While cosmology is a branch of astronomy that focuses on the universe's origin, evolution, and large-scale structure, astronomy encompasses the broader study of all extraterrestrial objects and phenomena.