Exams

A passage is given with 5 questions following it. Read the passage carefully and choose the best answer to each question out of the four alternatives.

The quest to find life outside the solar system got a big boost with the discovery of seven Earth-size extra-solar planets, or exoplanets, orbiting a dwarf star about 40 light years away. Unlike earlier discoveries of exoplanets, all seven planets could possibly have liquid water — a key to life as we know it on Earth — with three planets having the greatest chance. This is by far the largest collection of Earth-like planets in the habitable 'Goldilocks' zone of a star — neither too close nor too far from a star, which raises the possibility of liquid water being present on the surface. Only Earth has liquid water in the solar system. Since the dwarf star is much cooler than the Sun, the dimming of light each time a planet passes or transits before the star could be easily recorded from Earth unlike in cases when planets transit a Sun-like bright star. Since the initial discovery of three planets was made using the Chile-based Transiting Planets and Planetesimals Small Telescope, the exoplanet system is called TRAPPIST-1.

What is essential to have the possibility of life on a planet?

Which of the following is not considered as a part of the Abiotic Environment?

_____________ is the number of individuals of the same species that have come into the habitat from elsewhere during the time period under consideration.

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

Glacier, Waterfall, River, ?

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

head over heels

The length of a chord which is at a distance of 12 cm from the centre of a circle of radius 13 cm is

If 7 spiders make 7 webs in 7 days , then 1 spider will make 1 web in how many days ?

Select the missing number from the given alternatives?