Jagran Josh Science Quiz

Astronautics is the branch of science that focuses on the study and development of space travel. It involves the scientific and technological aspects of space exploration, including spacecraft design, propulsion systems, and navigation. Astronautics encompasses various disciplines such as physics, engineering, and astronomy, all aimed at understanding and advancing our capabilities to travel and explore outer space.

AC and DC stand for Alternating Current and Direct Current in the electrical field. Alternating Current refers to the flow of electric charge that periodically reverses direction, commonly used in household electricity. Direct Current, on the other hand, refers to the flow of electric charge in only one direction, commonly used in batteries and electronic devices.

Ceramics is the branch of science that focuses on the art and technology of creating objects using clay. This field involves various techniques such as shaping, molding, firing, and glazing clay to produce functional or decorative items. It encompasses a wide range of applications, from pottery and sculpture to tiles and porcelain. The study of ceramics involves understanding the properties of clay, its behavior during firing, and the various techniques used to manipulate it.

Deficiency of Vitamin C can cause scurvy. Scurvy is a disease characterized by weakness, anemia, gum disease, and skin hemorrhages. Vitamin C is essential for the synthesis of collagen, a protein that helps in the formation of connective tissues, blood vessels, and wound healing. Without enough Vitamin C, the body is unable to produce collagen, leading to the breakdown of connective tissues and the symptoms of scurvy. Vitamin A, Vitamin B, and Vitamin D deficiencies do not cause scurvy.

Araneology is the branch of science that deals with the study of spiders. This field focuses on various aspects of spiders, including their taxonomy, anatomy, behavior, ecology, and evolution. Araneologists study different species of spiders, their habitats, feeding habits, reproduction, and their role in ecosystems. They also investigate the venom and silk production of spiders, as well as their interactions with other organisms. By understanding spiders, araneologists contribute to our knowledge of biodiversity, ecological relationships, and the development of potential applications in medicine and technology.

Glaucoma is an eye disease, as mentioned in the question. Scientists have discovered a treatment for Glaucoma in rats, which implies that the disease affects the eyes of these animals. Therefore, the correct answer is "Eye."

The correct answer is "khamsin." Khamsin is an exceedingly hot wind that blows into Egypt, typically in the spring, from the Sahara Desert. It is a dry and dusty wind that can cause sandstorms and high temperatures.

The first working laser ever constructed used a ruby rod as its active medium. The ruby rod is a cylindrical piece of synthetic ruby that is doped with chromium ions. When energy is applied to the ruby rod, the chromium ions become excited and emit light. This light then bounces back and forth within the rod, reflecting off the ends, and amplifying to create a coherent beam of laser light. The use of a ruby rod as the active medium allowed for the production of a focused and intense laser beam.

Angelology is not the branch of science that deals with the study of blood cells or solar ellipse. It is the branch of science that deals with the study of the blood vascular system.

The Indian black eagle was recently seen in the Aravali Biodiversity Park after a period of 90 years. This suggests that the species has not been sighted in this particular area for almost a century. The sighting of the eagle after such a long gap indicates a positive change in the park's ecosystem and conservation efforts, allowing the bird to return to its natural habitat.