Quiz # 31



#1 Source of energy in ecosystem is –

The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.

#2 ‘Supernova’ is –

A supernova is a powerful and luminous stellar explosion. A supernova is a transient astronomical event, occurring during the last evolutionary stages of a massive star or when a white dwarf is triggered into runaway nuclear fusion.

#3 The solar radiation coming to Earth is called –

The solar radiation that reaches the Earth’s surface without being diffused is called direct beam solar radiation. The sum of the diffuse and direct solar radiation is called global solar radiation. Atmospheric conditions can reduce direct beam radiation by 10% on clear, dry days and by 100% during thick, cloudy days.

#4 Study of origin, evolution, and eventual fate of the Universe is known as?

It is the scientific study of the originevolution, and eventual fate of the universe. Physical cosmology is the scientific study of the universe’s origin, its large-scale structures and dynamics, and its ultimate fate, as well as the laws of science that govern these areas.

#5 The four largest planets of the Solar System in decreasing size are –

Planet Sizes (Largest To Smallest):
  • Jupiter – (diameter = 142,800 km)
  • Saturn – (diameter = 120,660 km)
  • Uranus – (diameter = 51,118 km)
  • Neptune – (diameter -= 49,528 km)
  • Earth – (diameter = 12,756 km)
  • Venus – (diameter = 12,104 km)
  • Mars – (diameter = 6787 km)
  • Mercury – (diameter = 4879.4 km)
January 2, 2020

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