scientist, discoveries & inventions MCQ section 1 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (d)

The Lumière brothers, Auguste Marie Louis and Louis Jean were the earliest filmmakers in history. The Lumières held their first private screening of projected motion pictures in 1895.

Their first public screening of films at which admission was charged was held on December 28, 1895, at Salon Indien du Grand Café in Paris.

Answer: (b)

A lysimeter is used to measure the amount of actual evapotranspiration which is released by plants. By recording the amount of precipitation that an area receives and the amount lost through the soil, the amount of water lost to evapotranspiration can be calculated.

Answer: (c)

Entomology is the scientific study of insects, a branch of zoology. Like several of the other fields that are categorized within zoology, entomology is a taxon-based category.

At some 1.3 million described species, insects account for more than two-thirds of all known organisms.

Answer: (b)

The concept of stored-program seals with storage of instructions in computer memory to enable it to perform a variety of tasks in sequence or intermittently. The idea was introduced in the late 1940s by John von Neumann.

Answer: (c)

Astronomers have discovered a new planetoid at the far edge of our Solar System. The new object, named Sedna, is probably almost as big as the smallest planet, Pluto.

Sedna is very, very far away. It is more than twice as far from the Sun as Pluto, and about 90 times as far from the Sun as Earth. Sedna is probably a huge ball of ice.

The ice is reddish in colour. There are probably chemicals in the ice that make it red. Sedna orbits the Sun once every 10,500 years. Its orbit takes it out to about 900 times as far from the Sun as the Earth.